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