Eric Lee / smarc-uboot

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drivers/reset/tegra186-reset.c 1.77 KB
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4dd99d140   Stephen Warren   reset: add Tegra1... 
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  /*
   * Copyright (c) 2016, NVIDIA CORPORATION.
   *
   * SPDX-License-Identifier: GPL-2.0
   */
  
  #include <common.h>
  #include <dm.h>
  #include <misc.h>
  #include <reset-uclass.h>
  #include <asm/arch-tegra/bpmp_abi.h>
  
  static int tegra186_reset_request(struct reset_ctl *reset_ctl)
  {
  	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)
  ", __func__, reset_ctl,
  	      reset_ctl->dev, reset_ctl->id);
  
  	return 0;
  }
  
  static int tegra186_reset_free(struct reset_ctl *reset_ctl)
  {
  	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)
  ", __func__, reset_ctl,
  	      reset_ctl->dev, reset_ctl->id);
  
  	return 0;
  }
  
  static int tegra186_reset_common(struct reset_ctl *reset_ctl,
  				 enum mrq_reset_commands cmd)
  {
  	struct mrq_reset_request req;
  	int ret;
  
  	req.cmd = cmd;
  	req.reset_id = reset_ctl->id;
  
  	ret = misc_call(reset_ctl->dev->parent, MRQ_RESET, &req, sizeof(req),
  			NULL, 0);
  	if (ret < 0)
  		return ret;
  
  	return 0;
  }
  
  static int tegra186_reset_assert(struct reset_ctl *reset_ctl)
  {
  	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)
  ", __func__, reset_ctl,
  	      reset_ctl->dev, reset_ctl->id);
  
  	return tegra186_reset_common(reset_ctl, CMD_RESET_ASSERT);
  }
  
  static int tegra186_reset_deassert(struct reset_ctl *reset_ctl)
  {
  	debug("%s(reset_ctl=%p) (dev=%p, id=%lu)
  ", __func__, reset_ctl,
  	      reset_ctl->dev, reset_ctl->id);
  
  	return tegra186_reset_common(reset_ctl, CMD_RESET_DEASSERT);
  }
  
  struct reset_ops tegra186_reset_ops = {
  	.request = tegra186_reset_request,
  	.free = tegra186_reset_free,
  	.rst_assert = tegra186_reset_assert,
  	.rst_deassert = tegra186_reset_deassert,
  };
  
  static int tegra186_reset_probe(struct udevice *dev)
  {
  	debug("%s(dev=%p)
  ", __func__, dev);
  
  	return 0;
  }
  
  U_BOOT_DRIVER(tegra186_reset) = {
  	.name		= "tegra186_reset",
  	.id		= UCLASS_RESET,
  	.probe		= tegra186_reset_probe,
  	.ops = &tegra186_reset_ops,
  };