Eric Lee / smarc-fsl-linux-kernel

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arch/arm/plat-samsung/pd.c 2 KB
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d930596a3   Changhwan Youn   ARM: SAMSUNG: Add... 
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  /* linux/arch/arm/plat-samsung/pd.c
   *
   * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   *		http://www.samsung.com
   *
   * Samsung Power domain support
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
  */
  
  #include <linux/init.h>
a69e4c28b   Kukjin Kim   ARM: SAMSUNG: inc... 
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  #include <linux/export.h>
d930596a3   Changhwan Youn   ARM: SAMSUNG: Add... 
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  #include <linux/platform_device.h>
  #include <linux/err.h>
  #include <linux/pm_runtime.h>
  
  #include <plat/pd.h>
  
  static int samsung_pd_probe(struct platform_device *pdev)
  {
  	struct samsung_pd_info *pdata = pdev->dev.platform_data;
  	struct device *dev = &pdev->dev;
  
  	if (!pdata) {
  		dev_err(dev, "no device data specified
  ");
  		return -ENOENT;
  	}
  
  	pm_runtime_set_active(dev);
  	pm_runtime_enable(dev);
  
  	dev_info(dev, "power domain registered
  ");
  	return 0;
  }
  
  static int __devexit samsung_pd_remove(struct platform_device *pdev)
  {
  	struct device *dev = &pdev->dev;
  
  	pm_runtime_disable(dev);
  	return 0;
  }
  
  static int samsung_pd_runtime_suspend(struct device *dev)
  {
  	struct samsung_pd_info *pdata = dev->platform_data;
  	int ret = 0;
  
  	if (pdata->disable)
  		ret = pdata->disable(dev);
  
  	dev_dbg(dev, "suspended
  ");
  	return ret;
  }
  
  static int samsung_pd_runtime_resume(struct device *dev)
  {
  	struct samsung_pd_info *pdata = dev->platform_data;
  	int ret = 0;
  
  	if (pdata->enable)
  		ret = pdata->enable(dev);
  
  	dev_dbg(dev, "resumed
  ");
  	return ret;
  }
  
  static const struct dev_pm_ops samsung_pd_pm_ops = {
  	.runtime_suspend	= samsung_pd_runtime_suspend,
  	.runtime_resume		= samsung_pd_runtime_resume,
  };
  
  static struct platform_driver samsung_pd_driver = {
  	.driver		= {
  		.name		= "samsung-pd",
  		.owner		= THIS_MODULE,
  		.pm		= &samsung_pd_pm_ops,
  	},
  	.probe		= samsung_pd_probe,
  	.remove		= __devexit_p(samsung_pd_remove),
  };
  
  static int __init samsung_pd_init(void)
  {
  	int ret;
  
  	ret = platform_driver_register(&samsung_pd_driver);
  	if (ret)
  		printk(KERN_ERR "%s: failed to add PD driver
  ", __func__);
  
  	return ret;
  }
  arch_initcall(samsung_pd_init);