// SPDX-License-Identifier: GPL-2.0+
/*
 * Texas Instruments System Control Interface Protocol Driver
 * Based on drivers/firmware/ti_sci.c from Linux.
 *
 * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
 *      Lokesh Vutla <lokeshvutla@ti.com>
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <mailbox.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <linux/bitops.h>
#include <linux/compat.h>
#include <linux/err.h>
#include <linux/soc/ti/k3-sec-proxy.h>
#include <linux/soc/ti/ti_sci_protocol.h>

#include "ti_sci.h"
#include "ti_sci_static_data.h"

/* List of all TI SCI devices active in system */
static LIST_HEAD(ti_sci_list);

/**
 * struct ti_sci_xfer - Structure representing a message flow
 * @tx_message: Transmit message
 * @rx_len:     Receive message length
 */
struct ti_sci_xfer {
        struct k3_sec_proxy_msg tx_message;
        u8 rx_len;
};

/**
 * struct ti_sci_rm_type_map - Structure representing TISCI Resource
 *                              management representation of dev_ids.
 * @dev_id:     TISCI device ID
 * @type:       Corresponding id as identified by TISCI RM.
 *
 * Note: This is used only as a work around for using RM range apis
 *      for AM654 SoC. For future SoCs dev_id will be used as type
 *      for RM range APIs. In order to maintain ABI backward compatibility
 *      type is not being changed for AM654 SoC.
 */
struct ti_sci_rm_type_map {
        u32 dev_id;
        u16 type;
};

/**
 * struct ti_sci_desc - Description of SoC integration
 * @default_host_id:    Host identifier representing the compute entity
 * @max_rx_timeout_ms:  Timeout for communication with SoC (in Milliseconds)
 * @max_msgs: Maximum number of messages that can be pending
 *                simultaneously in the system
 * @max_msg_size: Maximum size of data per message that can be handled.
 */
struct ti_sci_desc {
        u8 default_host_id;
        int max_rx_timeout_ms;
        int max_msgs;
        int max_msg_size;
};

/**
 * struct ti_sci_info - Structure representing a TI SCI instance
 * @dev:        Device pointer
 * @desc:       SoC description for this instance
 * @handle:     Instance of TI SCI handle to send to clients.
 * @chan_tx:    Transmit mailbox channel
 * @chan_rx:    Receive mailbox channel
 * @xfer:       xfer info
 * @list:       list head
 * @is_secure:  Determines if the communication is through secure threads.
 * @host_id:    Host identifier representing the compute entity
 * @seq:        Seq id used for verification for tx and rx message.
 */
struct ti_sci_info {
        struct udevice *dev;
        const struct ti_sci_desc *desc;
        struct ti_sci_handle handle;
        struct mbox_chan chan_tx;
        struct mbox_chan chan_rx;
        struct mbox_chan chan_notify;
        struct ti_sci_xfer xfer;
        struct list_head list;
        struct list_head dev_list;
        bool is_secure;
        u8 host_id;
        u8 seq;
};

struct ti_sci_exclusive_dev {
        u32 id;
        u32 count;
        struct list_head list;
};

#define handle_to_ti_sci_info(h) container_of(h, struct ti_sci_info, handle)

/**
 * ti_sci_setup_one_xfer() - Setup one message type
 * @info:       Pointer to SCI entity information
 * @msg_type:   Message type
 * @msg_flags:  Flag to set for the message
 * @buf:        Buffer to be send to mailbox channel
 * @tx_message_size: transmit message size
 * @rx_message_size: receive message size. may be set to zero for send-only
 *                   transactions.
 *
 * Helper function which is used by various command functions that are
 * exposed to clients of this driver for allocating a message traffic event.
 *
 * Return: Corresponding ti_sci_xfer pointer if all went fine,
 *         else appropriate error pointer.
 */
static struct ti_sci_xfer *ti_sci_setup_one_xfer(struct ti_sci_info *info,
                                                 u16 msg_type, u32 msg_flags,
                                                 u32 *buf,
                                                 size_t tx_message_size,
                                                 size_t rx_message_size)
{
        struct ti_sci_xfer *xfer = &info->xfer;
        struct ti_sci_msg_hdr *hdr;

        /* Ensure we have sane transfer sizes */
        if (rx_message_size > info->desc->max_msg_size ||
            tx_message_size > info->desc->max_msg_size ||
            (rx_message_size > 0 && rx_message_size < sizeof(*hdr)) ||
            tx_message_size < sizeof(*hdr)) {
                dev_err(info->dev, "TI-SCI message transfer size not sane\n");
                return ERR_PTR(-ERANGE);
        }


        info->seq = ~info->seq;
        xfer->tx_message.buf = buf;
        xfer->tx_message.len = tx_message_size;
        xfer->rx_len = (u8)rx_message_size;

        hdr = (struct ti_sci_msg_hdr *)buf;
        hdr->seq = info->seq;
        hdr->type = msg_type;
        hdr->host = info->host_id;
        hdr->flags = msg_flags;

        return xfer;
}

/**
 * ti_sci_get_response() - Receive response from mailbox channel
 * @info:       Pointer to SCI entity information
 * @xfer:       Transfer to initiate and wait for response
 * @chan:       Channel to receive the response
 *
 * Return: -ETIMEDOUT in case of no response, if transmit error,
 *         return corresponding error, else if all goes well,
 *         return 0.
 */
static int ti_sci_get_response(struct ti_sci_info *info,
                                      struct ti_sci_xfer *xfer,
                                      struct mbox_chan *chan)
{
        struct k3_sec_proxy_msg *msg = &xfer->tx_message;
        struct ti_sci_secure_msg_hdr *secure_hdr;
        struct ti_sci_msg_hdr *hdr;
        int ret;

        /* Receive the response */
        ret = mbox_recv(chan, msg, info->desc->max_rx_timeout_ms * 1000);
        if (ret) {
                dev_err(info->dev, "%s: Message receive failed. ret = %d\n",
                        __func__, ret);
                return ret;
        }

        /* ToDo: Verify checksum */
        if (info->is_secure) {
                secure_hdr = (struct ti_sci_secure_msg_hdr *)msg->buf;
                msg->buf = (u32 *)((void *)msg->buf + sizeof(*secure_hdr));
        }

        /* msg is updated by mailbox driver */
        hdr = (struct ti_sci_msg_hdr *)msg->buf;

        /* Sanity check for message response */
        if (hdr->seq != info->seq) {
                dev_dbg(info->dev, "%s: Message for %d is not expected\n",
                        __func__, hdr->seq);
                return ret;
        }

        if (msg->len > info->desc->max_msg_size) {
                dev_err(info->dev, "%s: Unable to handle %zu xfer (max %d)\n",
                        __func__, msg->len, info->desc->max_msg_size);
                return -EINVAL;
        }

        if (msg->len < xfer->rx_len) {
                dev_err(info->dev, "%s: Recv xfer %zu < expected %d length\n",
                        __func__, msg->len, xfer->rx_len);
        }

        return ret;
}

/**
 * ti_sci_is_response_ack() - Generic ACK/NACK message checkup
 * @r:  pointer to response buffer
 *
 * Return: true if the response was an ACK, else returns false.
 */
static bool ti_sci_is_response_ack(void *r)
{
        struct ti_sci_msg_hdr *hdr = r;

        return hdr->flags & TI_SCI_FLAG_RESP_GENERIC_ACK ? true : false;
}

/**
 * ti_sci_do_xfer() - Do one transfer
 * @info:       Pointer to SCI entity information
 * @xfer:       Transfer to initiate and wait for response
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_do_xfer(struct ti_sci_info *info,
                                 struct ti_sci_xfer *xfer)
{
        struct k3_sec_proxy_msg *msg = &xfer->tx_message;
        u8 secure_buf[info->desc->max_msg_size];
        struct ti_sci_secure_msg_hdr secure_hdr;
        int ret;

        if (info->is_secure) {
                /* ToDo: get checksum of the entire message */
                secure_hdr.checksum = 0;
                secure_hdr.reserved = 0;
                memcpy(&secure_buf[sizeof(secure_hdr)], xfer->tx_message.buf,
                       xfer->tx_message.len);

                xfer->tx_message.buf = (u32 *)secure_buf;
                xfer->tx_message.len += sizeof(secure_hdr);

                if (xfer->rx_len)
                        xfer->rx_len += sizeof(secure_hdr);
        }

        /* Send the message */
        ret = mbox_send(&info->chan_tx, msg);
        if (ret) {
                dev_err(info->dev, "%s: Message sending failed. ret = %d\n",
                        __func__, ret);
                return ret;
        }

        /* Get response if requested */
        if (xfer->rx_len) {
                ret = ti_sci_get_response(info, xfer, &info->chan_rx);
                if (!ti_sci_is_response_ack(xfer->tx_message.buf)) {
                        dev_err(info->dev, "Message not acknowledged");
                        ret = -ENODEV;
                }
        }

        return ret;
}

/**
 * ti_sci_cmd_get_revision() - command to get the revision of the SCI entity
 * @handle:     pointer to TI SCI handle
 *
 * Updates the SCI information in the internal data structure.
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_get_revision(struct ti_sci_handle *handle)
{
        struct ti_sci_msg_resp_version *rev_info;
        struct ti_sci_version_info *ver;
        struct ti_sci_msg_hdr hdr;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_VERSION,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&hdr, sizeof(struct ti_sci_msg_hdr),
                                     sizeof(*rev_info));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        rev_info = (struct ti_sci_msg_resp_version *)xfer->tx_message.buf;

        ver = &handle->version;
        ver->abi_major = rev_info->abi_major;
        ver->abi_minor = rev_info->abi_minor;
        ver->firmware_revision = rev_info->firmware_revision;
        strncpy(ver->firmware_description, rev_info->firmware_description,
                sizeof(ver->firmware_description));

        return 0;
}

/**
 * cmd_set_board_config_using_msg() - Common command to send board configuration
 *                                    message
 * @handle:     pointer to TI SCI handle
 * @msg_type:   One of the TISCI message types to set board configuration
 * @addr:       Address where the board config structure is located
 * @size:       Size of the board config structure
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int cmd_set_board_config_using_msg(const struct ti_sci_handle *handle,
                                          u16 msg_type, u64 addr, u32 size)
{
        struct ti_sci_msg_board_config req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, msg_type,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.boardcfgp_high = (addr >> 32) & 0xffffffff;
        req.boardcfgp_low = addr & 0xffffffff;
        req.boardcfg_size = size;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_set_board_config() - Command to send board configuration message
 * @handle:     pointer to TI SCI handle
 * @addr:       Address where the board config structure is located
 * @size:       Size of the board config structure
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_set_board_config(const struct ti_sci_handle *handle,
                                       u64 addr, u32 size)
{
        return cmd_set_board_config_using_msg(handle,
                                              TI_SCI_MSG_BOARD_CONFIG,
                                              addr, size);
}

/**
 * ti_sci_cmd_set_board_config_rm() - Command to send board resource
 *                                    management configuration
 * @handle:     pointer to TI SCI handle
 * @addr:       Address where the board RM config structure is located
 * @size:       Size of the RM config structure
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static
int ti_sci_cmd_set_board_config_rm(const struct ti_sci_handle *handle,
                                   u64 addr, u32 size)
{
        return cmd_set_board_config_using_msg(handle,
                                              TI_SCI_MSG_BOARD_CONFIG_RM,
                                              addr, size);
}

/**
 * ti_sci_cmd_set_board_config_security() - Command to send board security
 *                                          configuration message
 * @handle:     pointer to TI SCI handle
 * @addr:       Address where the board security config structure is located
 * @size:       Size of the security config structure
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static
int ti_sci_cmd_set_board_config_security(const struct ti_sci_handle *handle,
                                         u64 addr, u32 size)
{
        return cmd_set_board_config_using_msg(handle,
                                              TI_SCI_MSG_BOARD_CONFIG_SECURITY,
                                              addr, size);
}

/**
 * ti_sci_cmd_set_board_config_pm() - Command to send board power and clock
 *                                    configuration message
 * @handle:     pointer to TI SCI handle
 * @addr:       Address where the board PM config structure is located
 * @size:       Size of the PM config structure
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_set_board_config_pm(const struct ti_sci_handle *handle,
                                          u64 addr, u32 size)
{
        return cmd_set_board_config_using_msg(handle,
                                              TI_SCI_MSG_BOARD_CONFIG_PM,
                                              addr, size);
}

static struct ti_sci_exclusive_dev
*ti_sci_get_exclusive_dev(struct list_head *dev_list, u32 id)
{
        struct ti_sci_exclusive_dev *dev;

        list_for_each_entry(dev, dev_list, list)
                if (dev->id == id)
                        return dev;

        return NULL;
}

static void ti_sci_add_exclusive_dev(struct ti_sci_info *info, u32 id)
{
        struct ti_sci_exclusive_dev *dev;

        dev = ti_sci_get_exclusive_dev(&info->dev_list, id);
        if (dev) {
                dev->count++;
                return;
        }

        dev = kzalloc(sizeof(*dev), GFP_KERNEL);
        dev->id = id;
        dev->count = 1;
        INIT_LIST_HEAD(&dev->list);
        list_add_tail(&dev->list, &info->dev_list);
}

static void ti_sci_delete_exclusive_dev(struct ti_sci_info *info, u32 id)
{
        struct ti_sci_exclusive_dev *dev;

        dev = ti_sci_get_exclusive_dev(&info->dev_list, id);
        if (!dev)
                return;

        if (dev->count > 0)
                dev->count--;
}

/**
 * ti_sci_set_device_state() - Set device state helper
 * @handle:     pointer to TI SCI handle
 * @id:         Device identifier
 * @flags:      flags to setup for the device
 * @state:      State to move the device to
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_set_device_state(const struct ti_sci_handle *handle,
                                   u32 id, u32 flags, u8 state)
{
        struct ti_sci_msg_req_set_device_state req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_DEVICE_STATE,
                                     flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.id = id;
        req.state = state;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        if (state == MSG_DEVICE_SW_STATE_AUTO_OFF)
                ti_sci_delete_exclusive_dev(info, id);
        else if (flags & MSG_FLAG_DEVICE_EXCLUSIVE)
                ti_sci_add_exclusive_dev(info, id);

        return ret;
}

/**
 * ti_sci_set_device_state_no_wait() - Set device state helper without
 *                                     requesting or waiting for a response.
 * @handle:     pointer to TI SCI handle
 * @id:         Device identifier
 * @flags:      flags to setup for the device
 * @state:      State to move the device to
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_set_device_state_no_wait(const struct ti_sci_handle *handle,
                                           u32 id, u32 flags, u8 state)
{
        struct ti_sci_msg_req_set_device_state req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_DEVICE_STATE,
                                     flags | TI_SCI_FLAG_REQ_GENERIC_NORESPONSE,
                                     (u32 *)&req, sizeof(req), 0);
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.id = id;
        req.state = state;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_get_device_state() - Get device state helper
 * @handle:     Handle to the device
 * @id:         Device Identifier
 * @clcnt:      Pointer to Context Loss Count
 * @resets:     pointer to resets
 * @p_state:    pointer to p_state
 * @c_state:    pointer to c_state
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_get_device_state(const struct ti_sci_handle *handle,
                                   u32 id,  u32 *clcnt,  u32 *resets,
                                   u8 *p_state,  u8 *c_state)
{
        struct ti_sci_msg_resp_get_device_state *resp;
        struct ti_sci_msg_req_get_device_state req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        if (!clcnt && !resets && !p_state && !c_state)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_DEVICE_STATE,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.id = id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_get_device_state *)xfer->tx_message.buf;

        if (clcnt)
                *clcnt = resp->context_loss_count;
        if (resets)
                *resets = resp->resets;
        if (p_state)
                *p_state = resp->programmed_state;
        if (c_state)
                *c_state = resp->current_state;

        return ret;
}

/**
 * ti_sci_cmd_get_device() - command to request for device managed by TISCI
 * @handle:     Pointer to TISCI handle as retrieved by *ti_sci_get_handle
 * @id:         Device Identifier
 *
 * Request for the device - NOTE: the client MUST maintain integrity of
 * usage count by balancing get_device with put_device. No refcounting is
 * managed by driver for that purpose.
 *
 * NOTE: The request is for exclusive access for the processor.
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_get_device(const struct ti_sci_handle *handle, u32 id)
{
        return ti_sci_set_device_state(handle, id, 0,
                                       MSG_DEVICE_SW_STATE_ON);
}

static int ti_sci_cmd_get_device_exclusive(const struct ti_sci_handle *handle,
                                           u32 id)
{
        return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE,
                                       MSG_DEVICE_SW_STATE_ON);
}

/**
 * ti_sci_cmd_idle_device() - Command to idle a device managed by TISCI
 * @handle:     Pointer to TISCI handle as retrieved by *ti_sci_get_handle
 * @id:         Device Identifier
 *
 * Request for the device - NOTE: the client MUST maintain integrity of
 * usage count by balancing get_device with put_device. No refcounting is
 * managed by driver for that purpose.
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_idle_device(const struct ti_sci_handle *handle, u32 id)
{
        return ti_sci_set_device_state(handle, id,
                                       0,
                                       MSG_DEVICE_SW_STATE_RETENTION);
}

static int ti_sci_cmd_idle_device_exclusive(const struct ti_sci_handle *handle,
                                            u32 id)
{
        return ti_sci_set_device_state(handle, id, MSG_FLAG_DEVICE_EXCLUSIVE,
                                       MSG_DEVICE_SW_STATE_RETENTION);
}

/**
 * ti_sci_cmd_put_device() - command to release a device managed by TISCI
 * @handle:     Pointer to TISCI handle as retrieved by *ti_sci_get_handle
 * @id:         Device Identifier
 *
 * Request for the device - NOTE: the client MUST maintain integrity of
 * usage count by balancing get_device with put_device. No refcounting is
 * managed by driver for that purpose.
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_put_device(const struct ti_sci_handle *handle, u32 id)
{
        return ti_sci_set_device_state(handle, id, 0,
                                       MSG_DEVICE_SW_STATE_AUTO_OFF);
}

static
int ti_sci_cmd_release_exclusive_devices(const struct ti_sci_handle *handle)
{
        struct ti_sci_exclusive_dev *dev, *tmp;
        struct ti_sci_info *info;
        int i, cnt;

        info = handle_to_ti_sci_info(handle);

        list_for_each_entry_safe(dev, tmp, &info->dev_list, list) {
                cnt = dev->count;
                debug("%s: id = %d, cnt = %d\n", __func__, dev->id, cnt);
                for (i = 0; i < cnt; i++)
                        ti_sci_cmd_put_device(handle, dev->id);
        }

        return 0;
}

/**
 * ti_sci_cmd_dev_is_valid() - Is the device valid
 * @handle:     Pointer to TISCI handle as retrieved by *ti_sci_get_handle
 * @id:         Device Identifier
 *
 * Return: 0 if all went fine and the device ID is valid, else return
 * appropriate error.
 */
static int ti_sci_cmd_dev_is_valid(const struct ti_sci_handle *handle, u32 id)
{
        u8 unused;

        /* check the device state which will also tell us if the ID is valid */
        return ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &unused);
}

/**
 * ti_sci_cmd_dev_get_clcnt() - Get context loss counter
 * @handle:     Pointer to TISCI handle
 * @id:         Device Identifier
 * @count:      Pointer to Context Loss counter to populate
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_dev_get_clcnt(const struct ti_sci_handle *handle, u32 id,
                                    u32 *count)
{
        return ti_sci_get_device_state(handle, id, count, NULL, NULL, NULL);
}

/**
 * ti_sci_cmd_dev_is_idle() - Check if the device is requested to be idle
 * @handle:     Pointer to TISCI handle
 * @id:         Device Identifier
 * @r_state:    true if requested to be idle
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_dev_is_idle(const struct ti_sci_handle *handle, u32 id,
                                  bool *r_state)
{
        int ret;
        u8 state;

        if (!r_state)
                return -EINVAL;

        ret = ti_sci_get_device_state(handle, id, NULL, NULL, &state, NULL);
        if (ret)
                return ret;

        *r_state = (state == MSG_DEVICE_SW_STATE_RETENTION);

        return 0;
}

/**
 * ti_sci_cmd_dev_is_stop() - Check if the device is requested to be stopped
 * @handle:     Pointer to TISCI handle
 * @id:         Device Identifier
 * @r_state:    true if requested to be stopped
 * @curr_state: true if currently stopped.
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_dev_is_stop(const struct ti_sci_handle *handle, u32 id,
                                  bool *r_state,  bool *curr_state)
{
        int ret;
        u8 p_state, c_state;

        if (!r_state && !curr_state)
                return -EINVAL;

        ret =
            ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state);
        if (ret)
                return ret;

        if (r_state)
                *r_state = (p_state == MSG_DEVICE_SW_STATE_AUTO_OFF);
        if (curr_state)
                *curr_state = (c_state == MSG_DEVICE_HW_STATE_OFF);

        return 0;
}

/**
 * ti_sci_cmd_dev_is_on() - Check if the device is requested to be ON
 * @handle:     Pointer to TISCI handle
 * @id:         Device Identifier
 * @r_state:    true if requested to be ON
 * @curr_state: true if currently ON and active
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_dev_is_on(const struct ti_sci_handle *handle, u32 id,
                                bool *r_state,  bool *curr_state)
{
        int ret;
        u8 p_state, c_state;

        if (!r_state && !curr_state)
                return -EINVAL;

        ret =
            ti_sci_get_device_state(handle, id, NULL, NULL, &p_state, &c_state);
        if (ret)
                return ret;

        if (r_state)
                *r_state = (p_state == MSG_DEVICE_SW_STATE_ON);
        if (curr_state)
                *curr_state = (c_state == MSG_DEVICE_HW_STATE_ON);

        return 0;
}

/**
 * ti_sci_cmd_dev_is_trans() - Check if the device is currently transitioning
 * @handle:     Pointer to TISCI handle
 * @id:         Device Identifier
 * @curr_state: true if currently transitioning.
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_dev_is_trans(const struct ti_sci_handle *handle, u32 id,
                                   bool *curr_state)
{
        int ret;
        u8 state;

        if (!curr_state)
                return -EINVAL;

        ret = ti_sci_get_device_state(handle, id, NULL, NULL, NULL, &state);
        if (ret)
                return ret;

        *curr_state = (state == MSG_DEVICE_HW_STATE_TRANS);

        return 0;
}

/**
 * ti_sci_cmd_set_device_resets() - command to set resets for device managed
 *                                  by TISCI
 * @handle:     Pointer to TISCI handle as retrieved by *ti_sci_get_handle
 * @id:         Device Identifier
 * @reset_state: Device specific reset bit field
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_set_device_resets(const struct ti_sci_handle *handle,
                                        u32 id, u32 reset_state)
{
        struct ti_sci_msg_req_set_device_resets req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_DEVICE_RESETS,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.id = id;
        req.resets = reset_state;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_get_device_resets() - Get reset state for device managed
 *                                  by TISCI
 * @handle:             Pointer to TISCI handle
 * @id:                 Device Identifier
 * @reset_state:        Pointer to reset state to populate
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_get_device_resets(const struct ti_sci_handle *handle,
                                        u32 id, u32 *reset_state)
{
        return ti_sci_get_device_state(handle, id, NULL, reset_state, NULL,
                                       NULL);
}

/**
 * ti_sci_set_clock_state() - Set clock state helper
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @flags:      Header flags as needed
 * @state:      State to request for the clock.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_set_clock_state(const struct ti_sci_handle *handle,
                                  u32 dev_id, u8 clk_id,
                                  u32 flags, u8 state)
{
        struct ti_sci_msg_req_set_clock_state req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_CLOCK_STATE,
                                     flags | TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;
        req.request_state = state;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_get_clock_state() - Get clock state helper
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @programmed_state:   State requested for clock to move to
 * @current_state:      State that the clock is currently in
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_get_clock_state(const struct ti_sci_handle *handle,
                                      u32 dev_id, u8 clk_id,
                                      u8 *programmed_state, u8 *current_state)
{
        struct ti_sci_msg_resp_get_clock_state *resp;
        struct ti_sci_msg_req_get_clock_state req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        if (!programmed_state && !current_state)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_CLOCK_STATE,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.dev_id = dev_id;
        req.clk_id = clk_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_get_clock_state *)xfer->tx_message.buf;

        if (programmed_state)
                *programmed_state = resp->programmed_state;
        if (current_state)
                *current_state = resp->current_state;

        return ret;
}

/**
 * ti_sci_cmd_get_clock() - Get control of a clock from TI SCI
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @needs_ssc: 'true' if Spread Spectrum clock is desired, else 'false'
 * @can_change_freq: 'true' if frequency change is desired, else 'false'
 * @enable_input_term: 'true' if input termination is desired, else 'false'
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_get_clock(const struct ti_sci_handle *handle, u32 dev_id,
                                u8 clk_id, bool needs_ssc, bool can_change_freq,
                                bool enable_input_term)
{
        u32 flags = 0;

        flags |= needs_ssc ? MSG_FLAG_CLOCK_ALLOW_SSC : 0;
        flags |= can_change_freq ? MSG_FLAG_CLOCK_ALLOW_FREQ_CHANGE : 0;
        flags |= enable_input_term ? MSG_FLAG_CLOCK_INPUT_TERM : 0;

        return ti_sci_set_clock_state(handle, dev_id, clk_id, flags,
                                      MSG_CLOCK_SW_STATE_REQ);
}

/**
 * ti_sci_cmd_idle_clock() - Idle a clock which is in our control
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 *
 * NOTE: This clock must have been requested by get_clock previously.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_idle_clock(const struct ti_sci_handle *handle,
                                 u32 dev_id, u8 clk_id)
{
        return ti_sci_set_clock_state(handle, dev_id, clk_id, 0,
                                      MSG_CLOCK_SW_STATE_UNREQ);
}

/**
 * ti_sci_cmd_put_clock() - Release a clock from our control back to TISCI
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 *
 * NOTE: This clock must have been requested by get_clock previously.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_put_clock(const struct ti_sci_handle *handle,
                                u32 dev_id, u8 clk_id)
{
        return ti_sci_set_clock_state(handle, dev_id, clk_id, 0,
                                      MSG_CLOCK_SW_STATE_AUTO);
}

/**
 * ti_sci_cmd_clk_is_auto() - Is the clock being auto managed
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @req_state: state indicating if the clock is auto managed
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_is_auto(const struct ti_sci_handle *handle,
                                  u32 dev_id, u8 clk_id, bool *req_state)
{
        u8 state = 0;
        int ret;

        if (!req_state)
                return -EINVAL;

        ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id, &state, NULL);
        if (ret)
                return ret;

        *req_state = (state == MSG_CLOCK_SW_STATE_AUTO);
        return 0;
}

/**
 * ti_sci_cmd_clk_is_on() - Is the clock ON
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @req_state: state indicating if the clock is managed by us and enabled
 * @curr_state: state indicating if the clock is ready for operation
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_is_on(const struct ti_sci_handle *handle, u32 dev_id,
                                u8 clk_id, bool *req_state, bool *curr_state)
{
        u8 c_state = 0, r_state = 0;
        int ret;

        if (!req_state && !curr_state)
                return -EINVAL;

        ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id,
                                         &r_state, &c_state);
        if (ret)
                return ret;

        if (req_state)
                *req_state = (r_state == MSG_CLOCK_SW_STATE_REQ);
        if (curr_state)
                *curr_state = (c_state == MSG_CLOCK_HW_STATE_READY);
        return 0;
}

/**
 * ti_sci_cmd_clk_is_off() - Is the clock OFF
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @req_state: state indicating if the clock is managed by us and disabled
 * @curr_state: state indicating if the clock is NOT ready for operation
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_is_off(const struct ti_sci_handle *handle, u32 dev_id,
                                 u8 clk_id, bool *req_state, bool *curr_state)
{
        u8 c_state = 0, r_state = 0;
        int ret;

        if (!req_state && !curr_state)
                return -EINVAL;

        ret = ti_sci_cmd_get_clock_state(handle, dev_id, clk_id,
                                         &r_state, &c_state);
        if (ret)
                return ret;

        if (req_state)
                *req_state = (r_state == MSG_CLOCK_SW_STATE_UNREQ);
        if (curr_state)
                *curr_state = (c_state == MSG_CLOCK_HW_STATE_NOT_READY);
        return 0;
}

/**
 * ti_sci_cmd_clk_set_parent() - Set the clock source of a specific device clock
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @parent_id:  Parent clock identifier to set
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_set_parent(const struct ti_sci_handle *handle,
                                     u32 dev_id, u8 clk_id, u8 parent_id)
{
        struct ti_sci_msg_req_set_clock_parent req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_CLOCK_PARENT,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;
        req.parent_id = parent_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_clk_get_parent() - Get current parent clock source
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @parent_id:  Current clock parent
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_get_parent(const struct ti_sci_handle *handle,
                                     u32 dev_id, u8 clk_id, u8 *parent_id)
{
        struct ti_sci_msg_resp_get_clock_parent *resp;
        struct ti_sci_msg_req_get_clock_parent req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle || !parent_id)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_CLOCK_PARENT,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        *parent_id = resp->parent_id;

        return ret;
}

/**
 * ti_sci_cmd_clk_get_num_parents() - Get num parents of the current clk source
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @num_parents: Returns he number of parents to the current clock.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_get_num_parents(const struct ti_sci_handle *handle,
                                          u32 dev_id, u8 clk_id,
                                          u8 *num_parents)
{
        struct ti_sci_msg_resp_get_clock_num_parents *resp;
        struct ti_sci_msg_req_get_clock_num_parents req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle || !num_parents)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_NUM_CLOCK_PARENTS,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_get_clock_num_parents *)
                                                        xfer->tx_message.buf;

        *num_parents = resp->num_parents;

        return ret;
}

/**
 * ti_sci_cmd_clk_get_match_freq() - Find a good match for frequency
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @min_freq:   The minimum allowable frequency in Hz. This is the minimum
 *              allowable programmed frequency and does not account for clock
 *              tolerances and jitter.
 * @target_freq: The target clock frequency in Hz. A frequency will be
 *              processed as close to this target frequency as possible.
 * @max_freq:   The maximum allowable frequency in Hz. This is the maximum
 *              allowable programmed frequency and does not account for clock
 *              tolerances and jitter.
 * @match_freq: Frequency match in Hz response.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_get_match_freq(const struct ti_sci_handle *handle,
                                         u32 dev_id, u8 clk_id, u64 min_freq,
                                         u64 target_freq, u64 max_freq,
                                         u64 *match_freq)
{
        struct ti_sci_msg_resp_query_clock_freq *resp;
        struct ti_sci_msg_req_query_clock_freq req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle || !match_freq)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_QUERY_CLOCK_FREQ,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;
        req.min_freq_hz = min_freq;
        req.target_freq_hz = target_freq;
        req.max_freq_hz = max_freq;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_query_clock_freq *)xfer->tx_message.buf;

        *match_freq = resp->freq_hz;

        return ret;
}

/**
 * ti_sci_cmd_clk_set_freq() - Set a frequency for clock
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @min_freq:   The minimum allowable frequency in Hz. This is the minimum
 *              allowable programmed frequency and does not account for clock
 *              tolerances and jitter.
 * @target_freq: The target clock frequency in Hz. A frequency will be
 *              processed as close to this target frequency as possible.
 * @max_freq:   The maximum allowable frequency in Hz. This is the maximum
 *              allowable programmed frequency and does not account for clock
 *              tolerances and jitter.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_set_freq(const struct ti_sci_handle *handle,
                                   u32 dev_id, u8 clk_id, u64 min_freq,
                                   u64 target_freq, u64 max_freq)
{
        struct ti_sci_msg_req_set_clock_freq req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SET_CLOCK_FREQ,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;
        req.min_freq_hz = min_freq;
        req.target_freq_hz = target_freq;
        req.max_freq_hz = max_freq;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_clk_get_freq() - Get current frequency
 * @handle:     pointer to TI SCI handle
 * @dev_id:     Device identifier this request is for
 * @clk_id:     Clock identifier for the device for this request.
 *              Each device has it's own set of clock inputs. This indexes
 *              which clock input to modify.
 * @freq:       Currently frequency in Hz
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_clk_get_freq(const struct ti_sci_handle *handle,
                                   u32 dev_id, u8 clk_id, u64 *freq)
{
        struct ti_sci_msg_resp_get_clock_freq *resp;
        struct ti_sci_msg_req_get_clock_freq req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle || !freq)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_CLOCK_FREQ,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.dev_id = dev_id;
        req.clk_id = clk_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_get_clock_freq *)xfer->tx_message.buf;

        *freq = resp->freq_hz;

        return ret;
}

/**
 * ti_sci_cmd_core_reboot() - Command to request system reset
 * @handle:     pointer to TI SCI handle
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle)
{
        struct ti_sci_msg_req_reboot req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_SYS_RESET,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.domain = 0;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_get_resource_range - Helper to get a range of resources assigned
 *                             to a host. Resource is uniquely identified by
 *                             type and subtype.
 * @handle:             Pointer to TISCI handle.
 * @dev_id:             TISCI device ID.
 * @subtype:            Resource assignment subtype that is being requested
 *                      from the given device.
 * @s_host:             Host processor ID to which the resources are allocated
 * @range_start:        Start index of the resource range
 * @range_num:          Number of resources in the range
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_get_resource_range(const struct ti_sci_handle *handle,
                                     u32 dev_id, u8 subtype, u8 s_host,
                                     u16 *range_start, u16 *range_num)
{
        struct ti_sci_msg_resp_get_resource_range *resp;
        struct ti_sci_msg_req_get_resource_range req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_GET_RESOURCE_RANGE,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.secondary_host = s_host;
        req.type = dev_id & MSG_RM_RESOURCE_TYPE_MASK;
        req.subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

        resp = (struct ti_sci_msg_resp_get_resource_range *)xfer->tx_message.buf;
        if (!resp->range_start && !resp->range_num) {
                ret = -ENODEV;
        } else {
                *range_start = resp->range_start;
                *range_num = resp->range_num;
        };

fail:
        return ret;
}

static int __maybe_unused
ti_sci_cmd_get_resource_range_static(const struct ti_sci_handle *handle,
                                     u32 dev_id, u8 subtype,
                                     u16 *range_start, u16 *range_num)
{
        struct ti_sci_resource_static_data *data;
        int i = 0;

        while (1) {
                data = &rm_static_data[i];

                if (!data->dev_id)
                        return -EINVAL;

                if (data->dev_id != dev_id || data->subtype != subtype) {
                        i++;
                        continue;
                }

                *range_start = data->range_start;
                *range_num = data->range_num;

                return 0;
        }

        return -EINVAL;
}

/**
 * ti_sci_cmd_get_resource_range - Get a range of resources assigned to host
 *                                 that is same as ti sci interface host.
 * @handle:             Pointer to TISCI handle.
 * @dev_id:             TISCI device ID.
 * @subtype:            Resource assignment subtype that is being requested
 *                      from the given device.
 * @range_start:        Start index of the resource range
 * @range_num:          Number of resources in the range
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static int ti_sci_cmd_get_resource_range(const struct ti_sci_handle *handle,
                                         u32 dev_id, u8 subtype,
                                         u16 *range_start, u16 *range_num)
{
        return ti_sci_get_resource_range(handle, dev_id, subtype,
                                         TI_SCI_IRQ_SECONDARY_HOST_INVALID,
                                         range_start, range_num);
}

/**
 * ti_sci_cmd_get_resource_range_from_shost - Get a range of resources
 *                                            assigned to a specified host.
 * @handle:             Pointer to TISCI handle.
 * @dev_id:             TISCI device ID.
 * @subtype:            Resource assignment subtype that is being requested
 *                      from the given device.
 * @s_host:             Host processor ID to which the resources are allocated
 * @range_start:        Start index of the resource range
 * @range_num:          Number of resources in the range
 *
 * Return: 0 if all went fine, else return appropriate error.
 */
static
int ti_sci_cmd_get_resource_range_from_shost(const struct ti_sci_handle *handle,
                                             u32 dev_id, u8 subtype, u8 s_host,
                                             u16 *range_start, u16 *range_num)
{
        return ti_sci_get_resource_range(handle, dev_id, subtype, s_host,
                                         range_start, range_num);
}

/**
 * ti_sci_cmd_query_msmc() - Command to query currently available msmc memory
 * @handle:             pointer to TI SCI handle
 * @msms_start:         MSMC start as returned by tisci
 * @msmc_end:           MSMC end as returned by tisci
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_query_msmc(const struct ti_sci_handle *handle,
                                 u64 *msmc_start, u64 *msmc_end)
{
        struct ti_sci_msg_resp_query_msmc *resp;
        struct ti_sci_msg_hdr req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_QUERY_MSMC,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_query_msmc *)xfer->tx_message.buf;

        *msmc_start = ((u64)resp->msmc_start_high << TISCI_ADDR_HIGH_SHIFT) |
                        resp->msmc_start_low;
        *msmc_end = ((u64)resp->msmc_end_high << TISCI_ADDR_HIGH_SHIFT) |
                        resp->msmc_end_low;

        return ret;
}

/**
 * ti_sci_cmd_proc_request() - Command to request a physical processor control
 * @handle:     Pointer to TI SCI handle
 * @proc_id:    Processor ID this request is for
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_proc_request(const struct ti_sci_handle *handle,
                                   u8 proc_id)
{
        struct ti_sci_msg_req_proc_request req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_PROC_REQUEST,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_proc_release() - Command to release a physical processor control
 * @handle:     Pointer to TI SCI handle
 * @proc_id:    Processor ID this request is for
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_proc_release(const struct ti_sci_handle *handle,
                                   u8 proc_id)
{
        struct ti_sci_msg_req_proc_release req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_PROC_RELEASE,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_proc_handover() - Command to handover a physical processor
 *                              control to a host in the processor's access
 *                              control list.
 * @handle:     Pointer to TI SCI handle
 * @proc_id:    Processor ID this request is for
 * @host_id:    Host ID to get the control of the processor
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_proc_handover(const struct ti_sci_handle *handle,
                                    u8 proc_id, u8 host_id)
{
        struct ti_sci_msg_req_proc_handover req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_PROC_HANDOVER,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;
        req.host_id = host_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_set_proc_boot_cfg() - Command to set the processor boot
 *                                  configuration flags
 * @handle:             Pointer to TI SCI handle
 * @proc_id:            Processor ID this request is for
 * @config_flags_set:   Configuration flags to be set
 * @config_flags_clear: Configuration flags to be cleared.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_set_proc_boot_cfg(const struct ti_sci_handle *handle,
                                        u8 proc_id, u64 bootvector,
                                        u32 config_flags_set,
                                        u32 config_flags_clear)
{
        struct ti_sci_msg_req_set_proc_boot_config req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_SET_PROC_BOOT_CONFIG,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;
        req.bootvector_low = bootvector & TISCI_ADDR_LOW_MASK;
        req.bootvector_high = (bootvector & TISCI_ADDR_HIGH_MASK) >>
                                TISCI_ADDR_HIGH_SHIFT;
        req.config_flags_set = config_flags_set;
        req.config_flags_clear = config_flags_clear;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_set_proc_boot_ctrl() - Command to set the processor boot
 *                                   control flags
 * @handle:                     Pointer to TI SCI handle
 * @proc_id:                    Processor ID this request is for
 * @control_flags_set:          Control flags to be set
 * @control_flags_clear:        Control flags to be cleared
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_set_proc_boot_ctrl(const struct ti_sci_handle *handle,
                                         u8 proc_id, u32 control_flags_set,
                                         u32 control_flags_clear)
{
        struct ti_sci_msg_req_set_proc_boot_ctrl req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_SET_PROC_BOOT_CTRL,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;
        req.control_flags_set = control_flags_set;
        req.control_flags_clear = control_flags_clear;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_proc_auth_boot_image() - Command to authenticate and load the
 *                      image and then set the processor configuration flags.
 * @handle:     Pointer to TI SCI handle
 * @image_addr: Memory address at which payload image and certificate is
 *              located in memory, this is updated if the image data is
 *              moved during authentication.
 * @image_size: This is updated with the final size of the image after
 *              authentication.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_proc_auth_boot_image(const struct ti_sci_handle *handle,
                                           u64 *image_addr, u32 *image_size)
{
        struct ti_sci_msg_req_proc_auth_boot_image req;
        struct ti_sci_msg_resp_proc_auth_boot_image *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_PROC_AUTH_BOOT_IMAGE,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.cert_addr_low = *image_addr & TISCI_ADDR_LOW_MASK;
        req.cert_addr_high = (*image_addr & TISCI_ADDR_HIGH_MASK) >>
                                TISCI_ADDR_HIGH_SHIFT;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_proc_auth_boot_image *)xfer->tx_message.buf;

        *image_addr = (resp->image_addr_low & TISCI_ADDR_LOW_MASK) |
                        (((u64)resp->image_addr_high <<
                          TISCI_ADDR_HIGH_SHIFT) & TISCI_ADDR_HIGH_MASK);
        *image_size = resp->image_size;

        return ret;
}

/**
 * ti_sci_cmd_get_proc_boot_status() - Command to get the processor boot status
 * @handle:     Pointer to TI SCI handle
 * @proc_id:    Processor ID this request is for
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_get_proc_boot_status(const struct ti_sci_handle *handle,
                                           u8 proc_id, u64 *bv, u32 *cfg_flags,
                                           u32 *ctrl_flags, u32 *sts_flags)
{
        struct ti_sci_msg_resp_get_proc_boot_status *resp;
        struct ti_sci_msg_req_get_proc_boot_status req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_GET_PROC_BOOT_STATUS,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_resp_get_proc_boot_status *)

                                                        xfer->tx_message.buf;

        *bv = (resp->bootvector_low & TISCI_ADDR_LOW_MASK) |
                        (((u64)resp->bootvector_high  <<
                          TISCI_ADDR_HIGH_SHIFT) & TISCI_ADDR_HIGH_MASK);
        *cfg_flags = resp->config_flags;
        *ctrl_flags = resp->control_flags;
        *sts_flags = resp->status_flags;

        return ret;
}

/**
 * ti_sci_proc_wait_boot_status_no_wait() - Helper function to wait for a
 *                              processor boot status without requesting or
 *                              waiting for a response.
 * @proc_id:                    Processor ID this request is for
 * @num_wait_iterations:        Total number of iterations we will check before
 *                              we will timeout and give up
 * @num_match_iterations:       How many iterations should we have continued
 *                              status to account for status bits glitching.
 *                              This is to make sure that match occurs for
 *                              consecutive checks. This implies that the
 *                              worst case should consider that the stable
 *                              time should at the worst be num_wait_iterations
 *                              num_match_iterations to prevent timeout.
 * @delay_per_iteration_us:     Specifies how long to wait (in micro seconds)
 *                              between each status checks. This is the minimum
 *                              duration, and overhead of register reads and
 *                              checks are on top of this and can vary based on
 *                              varied conditions.
 * @delay_before_iterations_us: Specifies how long to wait (in micro seconds)
 *                              before the very first check in the first
 *                              iteration of status check loop. This is the
 *                              minimum duration, and overhead of register
 *                              reads and checks are.
 * @status_flags_1_set_all_wait:If non-zero, Specifies that all bits of the
 *                              status matching this field requested MUST be 1.
 * @status_flags_1_set_any_wait:If non-zero, Specifies that at least one of the
 *                              bits matching this field requested MUST be 1.
 * @status_flags_1_clr_all_wait:If non-zero, Specifies that all bits of the
 *                              status matching this field requested MUST be 0.
 * @status_flags_1_clr_any_wait:If non-zero, Specifies that at least one of the
 *                              bits matching this field requested MUST be 0.
 *
 * Return: 0 if all goes well, else appropriate error message
 */
static int
ti_sci_proc_wait_boot_status_no_wait(const struct ti_sci_handle *handle,
                                     u8 proc_id,
                                     u8 num_wait_iterations,
                                     u8 num_match_iterations,
                                     u8 delay_per_iteration_us,
                                     u8 delay_before_iterations_us,
                                     u32 status_flags_1_set_all_wait,
                                     u32 status_flags_1_set_any_wait,
                                     u32 status_flags_1_clr_all_wait,
                                     u32 status_flags_1_clr_any_wait)
{
        struct ti_sci_msg_req_wait_proc_boot_status req;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_WAIT_PROC_BOOT_STATUS,
                                     TI_SCI_FLAG_REQ_GENERIC_NORESPONSE,
                                     (u32 *)&req, sizeof(req), 0);
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.processor_id = proc_id;
        req.num_wait_iterations = num_wait_iterations;
        req.num_match_iterations = num_match_iterations;
        req.delay_per_iteration_us = delay_per_iteration_us;
        req.delay_before_iterations_us = delay_before_iterations_us;
        req.status_flags_1_set_all_wait = status_flags_1_set_all_wait;
        req.status_flags_1_set_any_wait = status_flags_1_set_any_wait;
        req.status_flags_1_clr_all_wait = status_flags_1_clr_all_wait;
        req.status_flags_1_clr_any_wait = status_flags_1_clr_any_wait;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return ret;
}

/**
 * ti_sci_cmd_proc_shutdown_no_wait() - Command to shutdown a core without
 *              requesting or waiting for a response. Note that this API call
 *              should be followed by placing the respective processor into
 *              either WFE or WFI mode.
 * @handle:     Pointer to TI SCI handle
 * @proc_id:    Processor ID this request is for
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_proc_shutdown_no_wait(const struct ti_sci_handle *handle,
                                            u8 proc_id)
{
        int ret;
        struct ti_sci_info *info;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        /*
         * Send the core boot status wait message waiting for either WFE or
         * WFI without requesting or waiting for a TISCI response with the
         * maximum wait time to give us the best chance to get to the WFE/WFI
         * command that should follow the invocation of this API before the
         * DMSC-internal processing of this command times out. Note that
         * waiting for the R5 WFE/WFI flags will also work on an ARMV8 type
         * core as the related flag bit positions are the same.
         */
        ret = ti_sci_proc_wait_boot_status_no_wait(handle, proc_id,
                U8_MAX, 100, U8_MAX, U8_MAX,
                0, PROC_BOOT_STATUS_FLAG_R5_WFE | PROC_BOOT_STATUS_FLAG_R5_WFI,
                0, 0);
        if (ret) {
                dev_err(info->dev, "Sending core %u wait message fail %d\n",
                        proc_id, ret);
                return ret;
        }

        /*
         * Release a processor managed by TISCI without requesting or waiting
         * for a response.
         */
        ret = ti_sci_set_device_state_no_wait(handle, proc_id, 0,
                                              MSG_DEVICE_SW_STATE_AUTO_OFF);
        if (ret)
                dev_err(info->dev, "Sending core %u shutdown message fail %d\n",
                        proc_id, ret);

        return ret;
}

/**
 * ti_sci_cmd_ring_config() - configure RA ring
 * @handle:     pointer to TI SCI handle
 * @valid_params: Bitfield defining validity of ring configuration parameters.
 * @nav_id: Device ID of Navigator Subsystem from which the ring is allocated
 * @index: Ring index.
 * @addr_lo: The ring base address lo 32 bits
 * @addr_hi: The ring base address hi 32 bits
 * @count: Number of ring elements.
 * @mode: The mode of the ring
 * @size: The ring element size.
 * @order_id: Specifies the ring's bus order ID.
 *
 * Return: 0 if all went well, else returns appropriate error value.
 *
 * See @ti_sci_msg_rm_ring_cfg_req for more info.
 */
static int ti_sci_cmd_ring_config(const struct ti_sci_handle *handle,
                                  u32 valid_params, u16 nav_id, u16 index,
                                  u32 addr_lo, u32 addr_hi, u32 count,
                                  u8 mode, u8 size, u8 order_id)
{
        struct ti_sci_msg_rm_ring_cfg_resp *resp;
        struct ti_sci_msg_rm_ring_cfg_req req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_RM_RING_CFG,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.valid_params = valid_params;
        req.nav_id = nav_id;
        req.index = index;
        req.addr_lo = addr_lo;
        req.addr_hi = addr_hi;
        req.count = count;
        req.mode = mode;
        req.size = size;
        req.order_id = order_id;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

fail:
        dev_dbg(info->dev, "RM_RA:config ring %u ret:%d\n", index, ret);
        return ret;
}

static int ti_sci_cmd_rm_psil_pair(const struct ti_sci_handle *handle,
                                   u32 nav_id, u32 src_thread, u32 dst_thread)
{
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_msg_psil_pair req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_RM_PSIL_PAIR,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.nav_id = nav_id;
        req.src_thread = src_thread;
        req.dst_thread = dst_thread;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

fail:
        dev_dbg(info->dev, "RM_PSIL: nav: %u link pair %u->%u ret:%u\n",
                nav_id, src_thread, dst_thread, ret);
        return ret;
}

static int ti_sci_cmd_rm_psil_unpair(const struct ti_sci_handle *handle,
                                     u32 nav_id, u32 src_thread, u32 dst_thread)
{
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_msg_psil_unpair req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TI_SCI_MSG_RM_PSIL_UNPAIR,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.nav_id = nav_id;
        req.src_thread = src_thread;
        req.dst_thread = dst_thread;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

fail:
        dev_dbg(info->dev, "RM_PSIL: link unpair %u->%u ret:%u\n",
                src_thread, dst_thread, ret);
        return ret;
}

static int ti_sci_cmd_rm_udmap_tx_ch_cfg(
                        const struct ti_sci_handle *handle,
                        const struct ti_sci_msg_rm_udmap_tx_ch_cfg *params)
{
        struct ti_sci_msg_rm_udmap_tx_ch_cfg_resp *resp;
        struct ti_sci_msg_rm_udmap_tx_ch_cfg_req req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_RM_UDMAP_TX_CH_CFG,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }
        req.valid_params = params->valid_params;
        req.nav_id = params->nav_id;
        req.index = params->index;
        req.tx_pause_on_err = params->tx_pause_on_err;
        req.tx_filt_einfo = params->tx_filt_einfo;
        req.tx_filt_pswords = params->tx_filt_pswords;
        req.tx_atype = params->tx_atype;
        req.tx_chan_type = params->tx_chan_type;
        req.tx_supr_tdpkt = params->tx_supr_tdpkt;
        req.tx_fetch_size = params->tx_fetch_size;
        req.tx_credit_count = params->tx_credit_count;
        req.txcq_qnum = params->txcq_qnum;
        req.tx_priority = params->tx_priority;
        req.tx_qos = params->tx_qos;
        req.tx_orderid = params->tx_orderid;
        req.fdepth = params->fdepth;
        req.tx_sched_priority = params->tx_sched_priority;
        req.tx_burst_size = params->tx_burst_size;
        req.tx_tdtype = params->tx_tdtype;
        req.extended_ch_type = params->extended_ch_type;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

fail:
        dev_dbg(info->dev, "TX_CH_CFG: chn %u ret:%u\n", params->index, ret);
        return ret;
}

static int ti_sci_cmd_rm_udmap_rx_ch_cfg(
                        const struct ti_sci_handle *handle,
                        const struct ti_sci_msg_rm_udmap_rx_ch_cfg *params)
{
        struct ti_sci_msg_rm_udmap_rx_ch_cfg_resp *resp;
        struct ti_sci_msg_rm_udmap_rx_ch_cfg_req req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_RM_UDMAP_RX_CH_CFG,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.valid_params = params->valid_params;
        req.nav_id = params->nav_id;
        req.index = params->index;
        req.rx_fetch_size = params->rx_fetch_size;
        req.rxcq_qnum = params->rxcq_qnum;
        req.rx_priority = params->rx_priority;
        req.rx_qos = params->rx_qos;
        req.rx_orderid = params->rx_orderid;
        req.rx_sched_priority = params->rx_sched_priority;
        req.flowid_start = params->flowid_start;
        req.flowid_cnt = params->flowid_cnt;
        req.rx_pause_on_err = params->rx_pause_on_err;
        req.rx_atype = params->rx_atype;
        req.rx_chan_type = params->rx_chan_type;
        req.rx_ignore_short = params->rx_ignore_short;
        req.rx_ignore_long = params->rx_ignore_long;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

fail:
        dev_dbg(info->dev, "RX_CH_CFG: chn %u ret:%d\n", params->index, ret);
        return ret;
}

static int ti_sci_cmd_rm_udmap_rx_flow_cfg(
                        const struct ti_sci_handle *handle,
                        const struct ti_sci_msg_rm_udmap_flow_cfg *params)
{
        struct ti_sci_msg_rm_udmap_flow_cfg_resp *resp;
        struct ti_sci_msg_rm_udmap_flow_cfg_req req;
        struct ti_sci_xfer *xfer;
        struct ti_sci_info *info;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_RM_UDMAP_FLOW_CFG,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.valid_params = params->valid_params;
        req.nav_id = params->nav_id;
        req.flow_index = params->flow_index;
        req.rx_einfo_present = params->rx_einfo_present;
        req.rx_psinfo_present = params->rx_psinfo_present;
        req.rx_error_handling = params->rx_error_handling;
        req.rx_desc_type = params->rx_desc_type;
        req.rx_sop_offset = params->rx_sop_offset;
        req.rx_dest_qnum = params->rx_dest_qnum;
        req.rx_src_tag_hi = params->rx_src_tag_hi;
        req.rx_src_tag_lo = params->rx_src_tag_lo;
        req.rx_dest_tag_hi = params->rx_dest_tag_hi;
        req.rx_dest_tag_lo = params->rx_dest_tag_lo;
        req.rx_src_tag_hi_sel = params->rx_src_tag_hi_sel;
        req.rx_src_tag_lo_sel = params->rx_src_tag_lo_sel;
        req.rx_dest_tag_hi_sel = params->rx_dest_tag_hi_sel;
        req.rx_dest_tag_lo_sel = params->rx_dest_tag_lo_sel;
        req.rx_fdq0_sz0_qnum = params->rx_fdq0_sz0_qnum;
        req.rx_fdq1_qnum = params->rx_fdq1_qnum;
        req.rx_fdq2_qnum = params->rx_fdq2_qnum;
        req.rx_fdq3_qnum = params->rx_fdq3_qnum;
        req.rx_ps_location = params->rx_ps_location;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                goto fail;

fail:
        dev_dbg(info->dev, "RX_FL_CFG: %u ret:%d\n", params->flow_index, ret);
        return ret;
}

/**
 * ti_sci_cmd_set_fwl_region() - Request for configuring a firewall region
 * @handle:    pointer to TI SCI handle
 * @region:    region configuration parameters
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_set_fwl_region(const struct ti_sci_handle *handle,
                                     const struct ti_sci_msg_fwl_region *region)
{
        struct ti_sci_msg_fwl_set_firewall_region_req req;
        struct ti_sci_msg_hdr *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_FWL_SET,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.fwl_id = region->fwl_id;
        req.region = region->region;
        req.n_permission_regs = region->n_permission_regs;
        req.control = region->control;
        req.permissions[0] = region->permissions[0];
        req.permissions[1] = region->permissions[1];
        req.permissions[2] = region->permissions[2];
        req.start_address = region->start_address;
        req.end_address = region->end_address;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        return 0;
}

/**
 * ti_sci_cmd_get_fwl_region() - Request for getting a firewall region
 * @handle:    pointer to TI SCI handle
 * @region:    region configuration parameters
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_get_fwl_region(const struct ti_sci_handle *handle,
                                     struct ti_sci_msg_fwl_region *region)
{
        struct ti_sci_msg_fwl_get_firewall_region_req req;
        struct ti_sci_msg_fwl_get_firewall_region_resp *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_FWL_GET,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.fwl_id = region->fwl_id;
        req.region = region->region;
        req.n_permission_regs = region->n_permission_regs;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_fwl_get_firewall_region_resp *)xfer->tx_message.buf;

        region->fwl_id = resp->fwl_id;
        region->region = resp->region;
        region->n_permission_regs = resp->n_permission_regs;
        region->control = resp->control;
        region->permissions[0] = resp->permissions[0];
        region->permissions[1] = resp->permissions[1];
        region->permissions[2] = resp->permissions[2];
        region->start_address = resp->start_address;
        region->end_address = resp->end_address;

        return 0;
}

/**
 * ti_sci_cmd_change_fwl_owner() - Request for changing a firewall owner
 * @handle:    pointer to TI SCI handle
 * @region:    region configuration parameters
 *
 * Return: 0 if all went well, else returns appropriate error value.
 */
static int ti_sci_cmd_change_fwl_owner(const struct ti_sci_handle *handle,
                                       struct ti_sci_msg_fwl_owner *owner)
{
        struct ti_sci_msg_fwl_change_owner_info_req req;
        struct ti_sci_msg_fwl_change_owner_info_resp *resp;
        struct ti_sci_info *info;
        struct ti_sci_xfer *xfer;
        int ret = 0;

        if (IS_ERR(handle))
                return PTR_ERR(handle);
        if (!handle)
                return -EINVAL;

        info = handle_to_ti_sci_info(handle);

        xfer = ti_sci_setup_one_xfer(info, TISCI_MSG_FWL_CHANGE_OWNER,
                                     TI_SCI_FLAG_REQ_ACK_ON_PROCESSED,
                                     (u32 *)&req, sizeof(req), sizeof(*resp));
        if (IS_ERR(xfer)) {
                ret = PTR_ERR(xfer);
                return ret;
        }

        req.fwl_id = owner->fwl_id;
        req.region = owner->region;
        req.owner_index = owner->owner_index;

        ret = ti_sci_do_xfer(info, xfer);
        if (ret)
                return ret;

        resp = (struct ti_sci_msg_fwl_change_owner_info_resp *)xfer->tx_message.buf;

        owner->fwl_id = resp->fwl_id;
        owner->region = resp->region;
        owner->owner_index = resp->owner_index;
        owner->owner_privid = resp->owner_privid;
        owner->owner_permission_bits = resp->owner_permission_bits;

        return ret;
}

/*
 * ti_sci_setup_ops() - Setup the operations structures
 * @info:       pointer to TISCI pointer
 */
static void ti_sci_setup_ops(struct ti_sci_info *info)
{
        struct ti_sci_ops *ops = &info->handle.ops;
        struct ti_sci_board_ops *bops = &ops->board_ops;
        struct ti_sci_dev_ops *dops = &ops->dev_ops;
        struct ti_sci_clk_ops *cops = &ops->clk_ops;
        struct ti_sci_core_ops *core_ops = &ops->core_ops;
        struct ti_sci_rm_core_ops *rm_core_ops = &ops->rm_core_ops;
        struct ti_sci_proc_ops *pops = &ops->proc_ops;
        struct ti_sci_rm_ringacc_ops *rops = &ops->rm_ring_ops;
        struct ti_sci_rm_psil_ops *psilops = &ops->rm_psil_ops;
        struct ti_sci_rm_udmap_ops *udmap_ops = &ops->rm_udmap_ops;
        struct ti_sci_fwl_ops *fwl_ops = &ops->fwl_ops;

        bops->board_config = ti_sci_cmd_set_board_config;
        bops->board_config_rm = ti_sci_cmd_set_board_config_rm;
        bops->board_config_security = ti_sci_cmd_set_board_config_security;
        bops->board_config_pm = ti_sci_cmd_set_board_config_pm;

        dops->get_device = ti_sci_cmd_get_device;
        dops->get_device_exclusive = ti_sci_cmd_get_device_exclusive;
        dops->idle_device = ti_sci_cmd_idle_device;
        dops->idle_device_exclusive = ti_sci_cmd_idle_device_exclusive;
        dops->put_device = ti_sci_cmd_put_device;
        dops->is_valid = ti_sci_cmd_dev_is_valid;
        dops->get_context_loss_count = ti_sci_cmd_dev_get_clcnt;
        dops->is_idle = ti_sci_cmd_dev_is_idle;
        dops->is_stop = ti_sci_cmd_dev_is_stop;
        dops->is_on = ti_sci_cmd_dev_is_on;
        dops->is_transitioning = ti_sci_cmd_dev_is_trans;
        dops->set_device_resets = ti_sci_cmd_set_device_resets;
        dops->get_device_resets = ti_sci_cmd_get_device_resets;
        dops->release_exclusive_devices = ti_sci_cmd_release_exclusive_devices;

        cops->get_clock = ti_sci_cmd_get_clock;
        cops->idle_clock = ti_sci_cmd_idle_clock;
        cops->put_clock = ti_sci_cmd_put_clock;
        cops->is_auto = ti_sci_cmd_clk_is_auto;
        cops->is_on = ti_sci_cmd_clk_is_on;
        cops->is_off = ti_sci_cmd_clk_is_off;

        cops->set_parent = ti_sci_cmd_clk_set_parent;
        cops->get_parent = ti_sci_cmd_clk_get_parent;
        cops->get_num_parents = ti_sci_cmd_clk_get_num_parents;

        cops->get_best_match_freq = ti_sci_cmd_clk_get_match_freq;
        cops->set_freq = ti_sci_cmd_clk_set_freq;
        cops->get_freq = ti_sci_cmd_clk_get_freq;

        core_ops->reboot_device = ti_sci_cmd_core_reboot;
        core_ops->query_msmc = ti_sci_cmd_query_msmc;

        rm_core_ops->get_range = ti_sci_cmd_get_resource_range;
        rm_core_ops->get_range_from_shost =
                ti_sci_cmd_get_resource_range_from_shost;

        pops->proc_request = ti_sci_cmd_proc_request;
        pops->proc_release = ti_sci_cmd_proc_release;
        pops->proc_handover = ti_sci_cmd_proc_handover;
        pops->set_proc_boot_cfg = ti_sci_cmd_set_proc_boot_cfg;
        pops->set_proc_boot_ctrl = ti_sci_cmd_set_proc_boot_ctrl;
        pops->proc_auth_boot_image = ti_sci_cmd_proc_auth_boot_image;
        pops->get_proc_boot_status = ti_sci_cmd_get_proc_boot_status;
        pops->proc_shutdown_no_wait = ti_sci_cmd_proc_shutdown_no_wait;

        rops->config = ti_sci_cmd_ring_config;

        psilops->pair = ti_sci_cmd_rm_psil_pair;
        psilops->unpair = ti_sci_cmd_rm_psil_unpair;

        udmap_ops->tx_ch_cfg = ti_sci_cmd_rm_udmap_tx_ch_cfg;
        udmap_ops->rx_ch_cfg = ti_sci_cmd_rm_udmap_rx_ch_cfg;
        udmap_ops->rx_flow_cfg = ti_sci_cmd_rm_udmap_rx_flow_cfg;

        fwl_ops->set_fwl_region = ti_sci_cmd_set_fwl_region;
        fwl_ops->get_fwl_region = ti_sci_cmd_get_fwl_region;
        fwl_ops->change_fwl_owner = ti_sci_cmd_change_fwl_owner;
}

/**
 * ti_sci_get_handle_from_sysfw() - Get the TI SCI handle of the SYSFW
 * @dev:        Pointer to the SYSFW device
 *
 * Return: pointer to handle if successful, else EINVAL if invalid conditions
 *         are encountered.
 */
const
struct ti_sci_handle *ti_sci_get_handle_from_sysfw(struct udevice *sci_dev)
{
        if (!sci_dev)
                return ERR_PTR(-EINVAL);

        struct ti_sci_info *info = dev_get_priv(sci_dev);

        if (!info)
                return ERR_PTR(-EINVAL);

        struct ti_sci_handle *handle = &info->handle;

        if (!handle)
                return ERR_PTR(-EINVAL);

        return handle;
}

/**
 * ti_sci_get_handle() - Get the TI SCI handle for a device
 * @dev:        Pointer to device for which we want SCI handle
 *
 * Return: pointer to handle if successful, else EINVAL if invalid conditions
 *         are encountered.
 */
const struct ti_sci_handle *ti_sci_get_handle(struct udevice *dev)
{
        if (!dev)
                return ERR_PTR(-EINVAL);

        struct udevice *sci_dev = dev_get_parent(dev);

        return ti_sci_get_handle_from_sysfw(sci_dev);
}

/**
 * ti_sci_get_by_phandle() - Get the TI SCI handle using DT phandle
 * @dev:        device node
 * @propname:   property name containing phandle on TISCI node
 *
 * Return: pointer to handle if successful, else appropriate error value.
 */
const struct ti_sci_handle *ti_sci_get_by_phandle(struct udevice *dev,
                                                  const char *property)
{
        struct ti_sci_info *entry, *info = NULL;
        u32 phandle, err;
        ofnode node;

        err = ofnode_read_u32(dev_ofnode(dev), property, &phandle);
        if (err)
                return ERR_PTR(err);

        node = ofnode_get_by_phandle(phandle);
        if (!ofnode_valid(node))
                return ERR_PTR(-EINVAL);

        list_for_each_entry(entry, &ti_sci_list, list)
                if (ofnode_equal(dev_ofnode(entry->dev), node)) {
                        info = entry;
                        break;
                }

        if (!info)
                return ERR_PTR(-ENODEV);

        return &info->handle;
}

/**
 * ti_sci_of_to_info() - generate private data from device tree
 * @dev:        corresponding system controller interface device
 * @info:       pointer to driver specific private data
 *
 * Return: 0 if all goes good, else appropriate error message.
 */
static int ti_sci_of_to_info(struct udevice *dev, struct ti_sci_info *info)
{
        int ret;

        ret = mbox_get_by_name(dev, "tx", &info->chan_tx);
        if (ret) {
                dev_err(dev, "%s: Acquiring Tx channel failed. ret = %d\n",
                        __func__, ret);
                return ret;
        }

        ret = mbox_get_by_name(dev, "rx", &info->chan_rx);
        if (ret) {
                dev_err(dev, "%s: Acquiring Rx channel failed. ret = %d\n",
                        __func__, ret);
                return ret;
        }

        /* Notify channel is optional. Enable only if populated */
        ret = mbox_get_by_name(dev, "notify", &info->chan_notify);
        if (ret) {
                dev_dbg(dev, "%s: Acquiring notify channel failed. ret = %d\n",
                        __func__, ret);
        }

        info->host_id = dev_read_u32_default(dev, "ti,host-id",
                                             info->desc->default_host_id);

        info->is_secure = dev_read_bool(dev, "ti,secure-host");

        return 0;
}

/**
 * ti_sci_probe() - Basic probe
 * @dev:        corresponding system controller interface device
 *
 * Return: 0 if all goes good, else appropriate error message.
 */
static int ti_sci_probe(struct udevice *dev)
{
        struct ti_sci_info *info;
        int ret;

        debug("%s(dev=%p)\n", __func__, dev);

        info = dev_get_priv(dev);
        info->desc = (void *)dev_get_driver_data(dev);

        ret = ti_sci_of_to_info(dev, info);
        if (ret) {
                dev_err(dev, "%s: Probe failed with error %d\n", __func__, ret);
                return ret;
        }

        info->dev = dev;
        info->seq = 0xA;

        list_add_tail(&info->list, &ti_sci_list);
        ti_sci_setup_ops(info);

        ret = ti_sci_cmd_get_revision(&info->handle);

        INIT_LIST_HEAD(&info->dev_list);

        return ret;
}

/**
 * ti_sci_dm_probe() - Basic probe for DM to TIFS SCI
 * @dev:        corresponding system controller interface device
 *
 * Return: 0 if all goes good, else appropriate error message.
 */
static __maybe_unused int ti_sci_dm_probe(struct udevice *dev)
{
        struct ti_sci_rm_core_ops *rm_core_ops;
        struct ti_sci_rm_udmap_ops *udmap_ops;
        struct ti_sci_rm_ringacc_ops *rops;
        struct ti_sci_rm_psil_ops *psilops;
        struct ti_sci_ops *ops;
        struct ti_sci_info *info;
        int ret;

        debug("%s(dev=%p)\n", __func__, dev);

        info = dev_get_priv(dev);
        info->desc = (void *)dev_get_driver_data(dev);

        ret = ti_sci_of_to_info(dev, info);
        if (ret) {
                dev_err(dev, "%s: Probe failed with error %d\n", __func__, ret);
                return ret;
        }

        info->dev = dev;
        info->seq = 0xA;

        list_add_tail(&info->list, &ti_sci_list);

        ops = &info->handle.ops;

        rm_core_ops = &ops->rm_core_ops;
        rm_core_ops->get_range = ti_sci_cmd_get_resource_range_static;

        rops = &ops->rm_ring_ops;
        rops->config = ti_sci_cmd_ring_config;

        psilops = &ops->rm_psil_ops;
        psilops->pair = ti_sci_cmd_rm_psil_pair;
        psilops->unpair = ti_sci_cmd_rm_psil_unpair;

        udmap_ops = &ops->rm_udmap_ops;
        udmap_ops->tx_ch_cfg = ti_sci_cmd_rm_udmap_tx_ch_cfg;
        udmap_ops->rx_ch_cfg = ti_sci_cmd_rm_udmap_rx_ch_cfg;
        udmap_ops->rx_flow_cfg = ti_sci_cmd_rm_udmap_rx_flow_cfg;

        return ret;
}

/*
 * ti_sci_get_free_resource() - Get a free resource from TISCI resource.
 * @res:        Pointer to the TISCI resource
 *
 * Return: resource num if all went ok else TI_SCI_RESOURCE_NULL.
 */
u16 ti_sci_get_free_resource(struct ti_sci_resource *res)
{
        u16 set, free_bit;

        for (set = 0; set < res->sets; set++) {
                free_bit = find_first_zero_bit(res->desc[set].res_map,
                                               res->desc[set].num);
                if (free_bit != res->desc[set].num) {
                        set_bit(free_bit, res->desc[set].res_map);
                        return res->desc[set].start + free_bit;
                }
        }

        return TI_SCI_RESOURCE_NULL;
}

/**
 * ti_sci_release_resource() - Release a resource from TISCI resource.
 * @res:        Pointer to the TISCI resource
 */
void ti_sci_release_resource(struct ti_sci_resource *res, u16 id)
{
        u16 set;

        for (set = 0; set < res->sets; set++) {
                if (res->desc[set].start <= id &&
                    (res->desc[set].num + res->desc[set].start) > id)
                        clear_bit(id - res->desc[set].start,
                                  res->desc[set].res_map);
        }
}

/**
 * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device
 * @handle:     TISCI handle
 * @dev:        Device pointer to which the resource is assigned
 * @of_prop:    property name by which the resource are represented
 *
 * Note: This function expects of_prop to be in the form of tuples
 *      <type, subtype>. Allocates and initializes ti_sci_resource structure
 *      for each of_prop. Client driver can directly call
 *      ti_sci_(get_free, release)_resource apis for handling the resource.
 *
 * Return: Pointer to ti_sci_resource if all went well else appropriate
 *         error pointer.
 */
struct ti_sci_resource *
devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
                            struct udevice *dev, u32 dev_id, char *of_prop)
{
        u32 resource_subtype;
        struct ti_sci_resource *res;
        bool valid_set = false;
        int sets, i, ret;
        u32 *temp;

        res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL);
        if (!res)
                return ERR_PTR(-ENOMEM);

        sets = dev_read_size(dev, of_prop);
        if (sets < 0) {
                dev_err(dev, "%s resource type ids not available\n", of_prop);
                return ERR_PTR(sets);
        }
        temp = malloc(sets);
        sets /= sizeof(u32);
        res->sets = sets;

        res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc),
                                 GFP_KERNEL);
        if (!res->desc)
                return ERR_PTR(-ENOMEM);

        ret = dev_read_u32_array(dev, of_prop, temp, res->sets);
        if (ret)
                return ERR_PTR(-EINVAL);

        for (i = 0; i < res->sets; i++) {
                resource_subtype = temp[i];
                ret = handle->ops.rm_core_ops.get_range(handle, dev_id,
                                                        resource_subtype,
                                                        &res->desc[i].start,
                                                        &res->desc[i].num);
                if (ret) {
                        dev_dbg(dev, "type %d subtype %d not allocated for host %d\n",
                                dev_id, resource_subtype,
                                handle_to_ti_sci_info(handle)->host_id);
                        res->desc[i].start = 0;
                        res->desc[i].num = 0;
                        continue;
                }

                valid_set = true;
                dev_dbg(dev, "res type = %d, subtype = %d, start = %d, num = %d\n",
                        dev_id, resource_subtype, res->desc[i].start,
                        res->desc[i].num);

                res->desc[i].res_map =
                        devm_kzalloc(dev, BITS_TO_LONGS(res->desc[i].num) *
                                     sizeof(*res->desc[i].res_map), GFP_KERNEL);
                if (!res->desc[i].res_map)
                        return ERR_PTR(-ENOMEM);
        }

        if (valid_set)
                return res;