+++ /dev/null
-/*
- * $Id$
- *
- * Driver for LEDs connected to GPIO lines
- *
- * Copyright (C) 2007 OpenWrt.org
- * Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
- *
- * This file was derived from:
- * /drivers/led/leds-s3c24xx.c
- * (c) 2006 Simtec Electronics, Ben Dooks <ben@simtec.co.uk>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the
- * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/leds.h>
-#include <linux/err.h>
-
-#include <linux/gpio_leds.h>
-
-#include <asm/io.h>
-#include <asm/gpio.h>
-
-#define DRV_NAME "gpio-led"
-#define DRV_DESC "GPIO LEDs driver"
-
-struct gpio_led_device {
- struct led_classdev cdev;
- struct gpio_led_platform_data *pdata;
-};
-
-static inline struct gpio_led_device *pdev_to_led(struct platform_device *dev)
-{
- return platform_get_drvdata(dev);
-}
-
-static inline struct gpio_led_device *class_to_led(struct led_classdev *led_cdev)
-{
- return container_of(led_cdev, struct gpio_led_device, cdev);
-}
-
-static void gpio_led_set(struct led_classdev *led_cdev,
- enum led_brightness brightness)
-{
- struct gpio_led_device *led;
- struct gpio_led_platform_data *pdata;
-
- led = class_to_led(led_cdev);
- pdata = led->pdata;
-
- switch (brightness) {
- case LED_FULL:
- gpio_direction_output(pdata->gpio, pdata->value_on);
- break;
- case LED_OFF:
- gpio_direction_output(pdata->gpio, pdata->value_off);
- break;
- default:
- gpio_direction_output(pdata->gpio, brightness);
- break;
- }
-}
-
-static int __devinit gpio_led_probe(struct platform_device *dev)
-{
- struct gpio_led_platform_data *pdata;
- struct gpio_led_device *led;
- int ret;
-
- pdata = dev->dev.platform_data;
- if (pdata == NULL) {
- dev_err(&dev->dev, "no platform data, id=%d\n", dev->id);
- ret = -EINVAL;
- goto err;
- }
-
- if (pdata->name == NULL) {
- dev_err(&dev->dev, "no led name specified\n");
- ret = -EINVAL;
- goto err;
- }
-
- ret = gpio_request(pdata->gpio, pdata->name);
- if (ret) {
- dev_err(&dev->dev, "gpio_request failed\n");
- goto err;
- }
-
- led = kzalloc(sizeof(*led), GFP_KERNEL);
- if (led == NULL) {
- dev_err(&dev->dev, "no memory for device");
- ret = -ENOMEM;
- goto err_free_gpio;
- }
-
- platform_set_drvdata(dev, led);
- led->pdata = pdata;
- led->cdev.name = pdata->name;
- led->cdev.brightness_set = gpio_led_set;
-#ifdef CONFIG_LEDS_TRIGGERS
- led->cdev.default_trigger = pdata->trigger;
-#endif
-
- ret = led_classdev_register(&dev->dev, &led->cdev);
- if (ret < 0) {
- dev_err(&dev->dev, "led_classdev_register failed");
- goto err_free_led;
- }
-
- return 0;
-
-err_free_led:
- kfree(led);
-err_free_gpio:
- gpio_free(pdata->gpio);
-err:
- return ret;
-}
-
-static int __devexit gpio_led_remove(struct platform_device *dev)
-{
- struct gpio_led_device *led;
- struct gpio_led_platform_data *pdata;
-
- pdata = dev->dev.platform_data;
-
- led = pdev_to_led(dev);
- led_classdev_unregister(&led->cdev);
- kfree(led);
-
- gpio_free(pdata->gpio);
-
- return 0;
-}
-
-#ifdef CONFIG_PM
-static int gpio_led_suspend(struct platform_device *dev,
- pm_message_t state)
-{
- struct gpio_led_device *led;
-
- led = pdev_to_led(dev);
- led_classdev_suspend(&led->cdev);
-
- return 0;
-}
-
-static int gpio_led_resume(struct platform_device *dev)
-{
- struct gpio_led_device *led;
-
- led = pdev_to_led(dev);
- led_classdev_resume(&led->cdev);
-
- return 0;
-}
-#endif /* CONFIG_PM */
-
-static struct platform_driver gpio_led_driver = {
- .probe = gpio_led_probe,
- .remove = __devexit_p(gpio_led_remove),
-#ifdef CONFIG_PM
- .suspend = gpio_led_suspend,
- .resume = gpio_led_resume,
-#endif
- .driver = {
- .name = DRV_NAME,
- .owner = THIS_MODULE,
- },
-};
-
-static int __init gpio_led_init(void)
-{
- int ret;
-
- ret = platform_driver_register(&gpio_led_driver);
- if (ret)
- printk(KERN_ALERT DRV_DESC " register failed\n");
- else
- printk(KERN_INFO DRV_DESC " registered\n");
-
- return ret;
-}
-
-static void __exit gpio_led_exit(void)
-{
- platform_driver_unregister(&gpio_led_driver);
-}
-
-module_init(gpio_led_init);
-module_exit(gpio_led_exit);
-
-MODULE_AUTHOR("Gabor Juhos <juhosg at openwrt.org>");
-MODULE_DESCRIPTION(DRV_DESC);
-MODULE_LICENSE("GPL");
projects / openwrt / openwrt.git / blobdiff