174 строки
3.6 KiB
C
174 строки
3.6 KiB
C
/*
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* LEDs driver for PCEngines WRAP
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*
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* Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org>
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*
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* Based on leds-net48xx.c
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/platform_device.h>
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#include <linux/leds.h>
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#include <linux/err.h>
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#include <asm/io.h>
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#include <linux/scx200_gpio.h>
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#define DRVNAME "wrap-led"
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#define WRAP_POWER_LED_GPIO 2
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#define WRAP_ERROR_LED_GPIO 3
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#define WRAP_EXTRA_LED_GPIO 18
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static struct platform_device *pdev;
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static void wrap_power_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value)
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scx200_gpio_set_low(WRAP_POWER_LED_GPIO);
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else
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scx200_gpio_set_high(WRAP_POWER_LED_GPIO);
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}
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static void wrap_error_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value)
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scx200_gpio_set_low(WRAP_ERROR_LED_GPIO);
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else
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scx200_gpio_set_high(WRAP_ERROR_LED_GPIO);
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}
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static void wrap_extra_led_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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if (value)
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scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO);
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else
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scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO);
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}
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static struct led_classdev wrap_power_led = {
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.name = "wrap::power",
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.brightness_set = wrap_power_led_set,
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};
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static struct led_classdev wrap_error_led = {
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.name = "wrap::error",
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.brightness_set = wrap_error_led_set,
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};
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static struct led_classdev wrap_extra_led = {
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.name = "wrap::extra",
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.brightness_set = wrap_extra_led_set,
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};
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#ifdef CONFIG_PM
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static int wrap_led_suspend(struct platform_device *dev,
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pm_message_t state)
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{
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led_classdev_suspend(&wrap_power_led);
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led_classdev_suspend(&wrap_error_led);
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led_classdev_suspend(&wrap_extra_led);
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return 0;
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}
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static int wrap_led_resume(struct platform_device *dev)
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{
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led_classdev_resume(&wrap_power_led);
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led_classdev_resume(&wrap_error_led);
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led_classdev_resume(&wrap_extra_led);
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return 0;
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}
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#else
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#define wrap_led_suspend NULL
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#define wrap_led_resume NULL
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#endif
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static int wrap_led_probe(struct platform_device *pdev)
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{
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int ret;
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ret = led_classdev_register(&pdev->dev, &wrap_power_led);
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if (ret < 0)
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return ret;
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ret = led_classdev_register(&pdev->dev, &wrap_error_led);
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if (ret < 0)
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goto err1;
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ret = led_classdev_register(&pdev->dev, &wrap_extra_led);
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if (ret < 0)
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goto err2;
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return ret;
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err2:
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led_classdev_unregister(&wrap_error_led);
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err1:
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led_classdev_unregister(&wrap_power_led);
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return ret;
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}
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static int wrap_led_remove(struct platform_device *pdev)
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{
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led_classdev_unregister(&wrap_power_led);
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led_classdev_unregister(&wrap_error_led);
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led_classdev_unregister(&wrap_extra_led);
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return 0;
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}
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static struct platform_driver wrap_led_driver = {
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.probe = wrap_led_probe,
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.remove = wrap_led_remove,
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.suspend = wrap_led_suspend,
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.resume = wrap_led_resume,
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.driver = {
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.name = DRVNAME,
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.owner = THIS_MODULE,
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},
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};
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static int __init wrap_led_init(void)
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{
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int ret;
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if (!scx200_gpio_present()) {
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ret = -ENODEV;
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goto out;
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}
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ret = platform_driver_register(&wrap_led_driver);
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if (ret < 0)
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goto out;
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pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
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if (IS_ERR(pdev)) {
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ret = PTR_ERR(pdev);
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platform_driver_unregister(&wrap_led_driver);
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goto out;
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}
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out:
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return ret;
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}
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static void __exit wrap_led_exit(void)
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{
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platform_device_unregister(pdev);
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platform_driver_unregister(&wrap_led_driver);
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}
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module_init(wrap_led_init);
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module_exit(wrap_led_exit);
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MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
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MODULE_DESCRIPTION("PCEngines WRAP LED driver");
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MODULE_LICENSE("GPL");
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