diff options
Diffstat (limited to 'drivers/leds/leds-net48xx.c')
-rw-r--r-- | drivers/leds/leds-net48xx.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/leds/leds-net48xx.c b/drivers/leds/leds-net48xx.c new file mode 100644 index 00000000000..35ee52f9b79 --- /dev/null +++ b/drivers/leds/leds-net48xx.c @@ -0,0 +1,115 @@ +/* + * LEDs driver for Soekris net48xx + * + * Copyright (C) 2006 Chris Boot <bootc@bootc.net> + * + * Based on leds-ams-delta.c + * + * 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/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/leds.h> +#include <linux/err.h> +#include <asm/io.h> +#include <linux/scx200_gpio.h> + +#define NET48XX_ERROR_LED_GPIO 20 + +static struct platform_device *pdev; + +static void net48xx_error_led_set(struct led_classdev *led_cdev, + enum led_brightness value) +{ + if (value) + scx200_gpio_set_high(NET48XX_ERROR_LED_GPIO); + else + scx200_gpio_set_low(NET48XX_ERROR_LED_GPIO); +} + +static struct led_classdev net48xx_error_led = { + .name = "net48xx:error", + .brightness_set = net48xx_error_led_set, +}; + +#ifdef CONFIG_PM +static int net48xx_led_suspend(struct platform_device *dev, + pm_message_t state) +{ + led_classdev_suspend(&net48xx_error_led); + return 0; +} + +static int net48xx_led_resume(struct platform_device *dev) +{ + led_classdev_resume(&net48xx_error_led); + return 0; +} +#else +#define net48xx_led_suspend NULL +#define net48xx_led_resume NULL +#endif + +static int net48xx_led_probe(struct platform_device *pdev) +{ + return led_classdev_register(&pdev->dev, &net48xx_error_led); +} + +static int net48xx_led_remove(struct platform_device *pdev) +{ + led_classdev_unregister(&net48xx_error_led); + return 0; +} + +static struct platform_driver net48xx_led_driver = { + .driver.owner = THIS_MODULE, + .probe = net48xx_led_probe, + .remove = net48xx_led_remove, + .suspend = net48xx_led_suspend, + .resume = net48xx_led_resume, + .driver = { + .name = "net48xx-led", + }, +}; + +static int __init net48xx_led_init(void) +{ + int ret; + + if (!scx200_gpio_present()) { + ret = -ENODEV; + goto out; + } + + ret = platform_driver_register(&net48xx_led_driver); + if (ret < 0) + goto out; + + pdev = platform_device_register_simple("net48xx-led", -1, NULL, 0); + if (IS_ERR(pdev)) { + ret = PTR_ERR(pdev); + platform_driver_unregister(&net48xx_led_driver); + goto out; + } + +out: + return ret; +} + +static void __exit net48xx_led_exit(void) +{ + platform_device_unregister(pdev); + platform_driver_unregister(&net48xx_led_driver); +} + +module_init(net48xx_led_init); +module_exit(net48xx_led_exit); + +MODULE_AUTHOR("Chris Boot <bootc@bootc.net>"); +MODULE_DESCRIPTION("Soekris net48xx LED driver"); +MODULE_LICENSE("GPL"); + |