LXR linux/drivers/mfd/rsmu

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Core driver for Renesas Synchronization Management Unit (SMU) devices.
   4 *
   5 * Copyright (C) 2021 Integrated Device Technology, Inc., a Renesas Company.
   6 */
   7
   8#include <linux/init.h>
   9#include <linux/kernel.h>
  10#include <linux/mfd/core.h>
  11#include <linux/mfd/rsmu.h>
  12#include <linux/module.h>
  13#include <linux/of.h>
  14#include <linux/regmap.h>
  15#include <linux/slab.h>
  16
  17#include "rsmu.h"
  18
  19enum {
  20        RSMU_PHC = 0,
  21        RSMU_CDEV = 1,
  22        RSMU_N_DEVS = 2,
  23};
  24
  25static struct mfd_cell rsmu_cm_devs[] = {
  26        [RSMU_PHC] = {
  27                .name = "8a3400x-phc",
  28        },
  29        [RSMU_CDEV] = {
  30                .name = "8a3400x-cdev",
  31        },
  32};
  33
  34static struct mfd_cell rsmu_sabre_devs[] = {
  35        [RSMU_PHC] = {
  36                .name = "82p33x1x-phc",
  37        },
  38        [RSMU_CDEV] = {
  39                .name = "82p33x1x-cdev",
  40        },
  41};
  42
  43static struct mfd_cell rsmu_sl_devs[] = {
  44        [RSMU_PHC] = {
  45                .name = "8v19n85x-phc",
  46        },
  47        [RSMU_CDEV] = {
  48                .name = "8v19n85x-cdev",
  49        },
  50};
  51
  52int rsmu_core_init(struct rsmu_ddata *rsmu)
  53{
  54        struct mfd_cell *cells;
  55        int ret;
  56
  57        switch (rsmu->type) {
  58        case RSMU_CM:
  59                cells = rsmu_cm_devs;
  60                break;
  61        case RSMU_SABRE:
  62                cells = rsmu_sabre_devs;
  63                break;
  64        case RSMU_SL:
  65                cells = rsmu_sl_devs;
  66                break;
  67        default:
  68                dev_err(rsmu->dev, "Unsupported RSMU device type: %d\n", rsmu->type);
  69                return -ENODEV;
  70        }
  71
  72        mutex_init(&rsmu->lock);
  73
  74        ret = devm_mfd_add_devices(rsmu->dev, PLATFORM_DEVID_AUTO, cells,
  75                                   RSMU_N_DEVS, NULL, 0, NULL);
  76        if (ret < 0)
  77                dev_err(rsmu->dev, "Failed to register sub-devices: %d\n", ret);
  78
  79        return ret;
  80}
  81
  82void rsmu_core_exit(struct rsmu_ddata *rsmu)
  83{
  84        mutex_destroy(&rsmu->lock);
  85}
  86
  87MODULE_DESCRIPTION("Renesas SMU core driver");
  88MODULE_LICENSE("GPL");
  89