Eric Lee / smarc-fsl-linux-kernel

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drivers/bus/tegra-aconnect.c 2.06 KB
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81f7e3824   Eric Lee   Initial Release, ... 
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  /*
   * Tegra ACONNECT Bus Driver
   *
   * Copyright (C) 2016, NVIDIA CORPORATION.  All rights reserved.
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   */
  
  #include <linux/clk.h>
  #include <linux/module.h>
  #include <linux/of_platform.h>
  #include <linux/platform_device.h>
  #include <linux/pm_clock.h>
  #include <linux/pm_runtime.h>
  
  static int tegra_aconnect_probe(struct platform_device *pdev)
  {
  	int ret;
  
  	if (!pdev->dev.of_node)
  		return -EINVAL;
  
  	ret = pm_clk_create(&pdev->dev);
  	if (ret)
  		return ret;
  
  	ret = of_pm_clk_add_clk(&pdev->dev, "ape");
  	if (ret)
  		goto clk_destroy;
  
  	ret = of_pm_clk_add_clk(&pdev->dev, "apb2ape");
  	if (ret)
  		goto clk_destroy;
  
  	pm_runtime_enable(&pdev->dev);
  
  	of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
  
  	dev_info(&pdev->dev, "Tegra ACONNECT bus registered
  ");
  
  	return 0;
  
  clk_destroy:
  	pm_clk_destroy(&pdev->dev);
  
  	return ret;
  }
  
  static int tegra_aconnect_remove(struct platform_device *pdev)
  {
  	pm_runtime_disable(&pdev->dev);
  
  	pm_clk_destroy(&pdev->dev);
  
  	return 0;
  }
  
  static int tegra_aconnect_runtime_resume(struct device *dev)
  {
  	return pm_clk_resume(dev);
  }
  
  static int tegra_aconnect_runtime_suspend(struct device *dev)
  {
  	return pm_clk_suspend(dev);
  }
  
  static const struct dev_pm_ops tegra_aconnect_pm_ops = {
  	SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend,
  			   tegra_aconnect_runtime_resume, NULL)
  };
  
  static const struct of_device_id tegra_aconnect_of_match[] = {
  	{ .compatible = "nvidia,tegra210-aconnect", },
  	{ }
  };
  MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);
  
  static struct platform_driver tegra_aconnect_driver = {
  	.probe = tegra_aconnect_probe,
  	.remove = tegra_aconnect_remove,
  	.driver = {
  		.name = "tegra-aconnect",
  		.of_match_table = tegra_aconnect_of_match,
  		.pm = &tegra_aconnect_pm_ops,
  	},
  };
  module_platform_driver(tegra_aconnect_driver);
  
  MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver");
  MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>");
  MODULE_LICENSE("GPL v2");