LXR uboot/drivers/reset/tegra186-reset.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2016, NVIDIA CORPORATION.
   4 */
   5
   6#include <common.h>
   7#include <dm.h>
   8#include <log.h>
   9#include <malloc.h>
  10#include <misc.h>
  11#include <reset-uclass.h>
  12#include <asm/arch-tegra/bpmp_abi.h>
  13
  14static int tegra186_reset_request(struct reset_ctl *reset_ctl)
  15{
  16        debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  17              reset_ctl->dev, reset_ctl->id);
  18
  19        return 0;
  20}
  21
  22static int tegra186_reset_free(struct reset_ctl *reset_ctl)
  23{
  24        debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  25              reset_ctl->dev, reset_ctl->id);
  26
  27        return 0;
  28}
  29
  30static int tegra186_reset_common(struct reset_ctl *reset_ctl,
  31                                 enum mrq_reset_commands cmd)
  32{
  33        struct mrq_reset_request req;
  34        int ret;
  35
  36        req.cmd = cmd;
  37        req.reset_id = reset_ctl->id;
  38
  39        ret = misc_call(reset_ctl->dev->parent, MRQ_RESET, &req, sizeof(req),
  40                        NULL, 0);
  41        if (ret < 0)
  42                return ret;
  43
  44        return 0;
  45}
  46
  47static int tegra186_reset_assert(struct reset_ctl *reset_ctl)
  48{
  49        debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  50              reset_ctl->dev, reset_ctl->id);
  51
  52        return tegra186_reset_common(reset_ctl, CMD_RESET_ASSERT);
  53}
  54
  55static int tegra186_reset_deassert(struct reset_ctl *reset_ctl)
  56{
  57        debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  58              reset_ctl->dev, reset_ctl->id);
  59
  60        return tegra186_reset_common(reset_ctl, CMD_RESET_DEASSERT);
  61}
  62
  63struct reset_ops tegra186_reset_ops = {
  64        .request = tegra186_reset_request,
  65        .rfree = tegra186_reset_free,
  66        .rst_assert = tegra186_reset_assert,
  67        .rst_deassert = tegra186_reset_deassert,
  68};
  69
  70static int tegra186_reset_probe(struct udevice *dev)
  71{
  72        debug("%s(dev=%p)\n", __func__, dev);
  73
  74        return 0;
  75}
  76
  77U_BOOT_DRIVER(tegra186_reset) = {
  78        .name           = "tegra186_reset",
  79        .id             = UCLASS_RESET,
  80        .probe          = tegra186_reset_probe,
  81        .ops = &tegra186_reset_ops,
  82};
  83