Eric Lee / smarc-fsl-linux-kernel

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drivers/gpio/gpio-ucb1400.c 2.59 KB
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4cf8e53b3   Marek Vasut   mfd/gpio: add a G... 
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  /*
   * Philips UCB1400 GPIO driver
   *
   * Author: Marek Vasut <marek.vasut@gmail.com>
   *
   * 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/module.h>
  #include <linux/ucb1400.h>
  
  struct ucb1400_gpio_data *ucbdata;
  
  static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
  {
  	struct ucb1400_gpio *gpio;
  	gpio = container_of(gc, struct ucb1400_gpio, gc);
  	ucb1400_gpio_set_direction(gpio->ac97, off, 0);
  	return 0;
  }
  
  static int ucb1400_gpio_dir_out(struct gpio_chip *gc, unsigned off, int val)
  {
  	struct ucb1400_gpio *gpio;
  	gpio = container_of(gc, struct ucb1400_gpio, gc);
  	ucb1400_gpio_set_direction(gpio->ac97, off, 1);
  	ucb1400_gpio_set_value(gpio->ac97, off, val);
  	return 0;
  }
  
  static int ucb1400_gpio_get(struct gpio_chip *gc, unsigned off)
  {
  	struct ucb1400_gpio *gpio;
  	gpio = container_of(gc, struct ucb1400_gpio, gc);
  	return ucb1400_gpio_get_value(gpio->ac97, off);
  }
  
  static void ucb1400_gpio_set(struct gpio_chip *gc, unsigned off, int val)
  {
  	struct ucb1400_gpio *gpio;
  	gpio = container_of(gc, struct ucb1400_gpio, gc);
  	ucb1400_gpio_set_value(gpio->ac97, off, val);
  }
  
  static int ucb1400_gpio_probe(struct platform_device *dev)
  {
  	struct ucb1400_gpio *ucb = dev->dev.platform_data;
  	int err = 0;
  
  	if (!(ucbdata && ucbdata->gpio_offset)) {
  		err = -EINVAL;
  		goto err;
  	}
  
  	platform_set_drvdata(dev, ucb);
  
  	ucb->gc.label = "ucb1400_gpio";
  	ucb->gc.base = ucbdata->gpio_offset;
  	ucb->gc.ngpio = 10;
  	ucb->gc.owner = THIS_MODULE;
  
  	ucb->gc.direction_input = ucb1400_gpio_dir_in;
  	ucb->gc.direction_output = ucb1400_gpio_dir_out;
  	ucb->gc.get = ucb1400_gpio_get;
  	ucb->gc.set = ucb1400_gpio_set;
  	ucb->gc.can_sleep = 1;
  
  	err = gpiochip_add(&ucb->gc);
  	if (err)
  		goto err;
  
  	if (ucbdata && ucbdata->gpio_setup)
  		err = ucbdata->gpio_setup(&dev->dev, ucb->gc.ngpio);
  
  err:
  	return err;
  
  }
  
  static int ucb1400_gpio_remove(struct platform_device *dev)
  {
  	int err = 0;
  	struct ucb1400_gpio *ucb = platform_get_drvdata(dev);
  
  	if (ucbdata && ucbdata->gpio_teardown) {
  		err = ucbdata->gpio_teardown(&dev->dev, ucb->gc.ngpio);
  		if (err)
  			return err;
  	}
  
  	err = gpiochip_remove(&ucb->gc);
  	return err;
  }
  
  static struct platform_driver ucb1400_gpio_driver = {
  	.probe	= ucb1400_gpio_probe,
  	.remove	= ucb1400_gpio_remove,
  	.driver	= {
  		.name	= "ucb1400_gpio"
  	},
  };
4cf8e53b3   Marek Vasut   mfd/gpio: add a G... 
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  void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data)
  {
  	ucbdata = data;
  }
6f61415e9   Mark Brown   gpio: Convert GPI... 
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  module_platform_driver(ucb1400_gpio_driver);
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  MODULE_DESCRIPTION("Philips UCB1400 GPIO driver");
  MODULE_LICENSE("GPL");