/* * Copyright 2006 - Florian Fainelli <florian@openwrt.org> * * Control the Cobalt Qube/RaQ front LED */ #include <linux/io.h> #include <linux/ioport.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/types.h> #define LED_FRONT_LEFT 0x01 #define LED_FRONT_RIGHT 0x02 static void __iomem *led_port; static u8 led_value; static void qube_front_led_set(struct led_classdev *led_cdev, enum led_brightness brightness) { if (brightness) led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT; else led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT); writeb(led_value, led_port); } static struct led_classdev qube_front_led = { .name = "qube::front", .brightness = LED_FULL, .brightness_set = qube_front_led_set, .default_trigger = "default-on", }; static int cobalt_qube_led_probe(struct platform_device *pdev) { struct resource *res; int retval; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -EBUSY; led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res)); if (!led_port) return -ENOMEM; led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT; writeb(led_value, led_port); retval = led_classdev_register(&pdev->dev, &qube_front_led); if (retval) goto err_null; return 0; err_null: led_port = NULL; return retval; } static int cobalt_qube_led_remove(struct platform_device *pdev) { led_classdev_unregister(&qube_front_led); if (led_port) led_port = NULL; return 0; } static struct platform_driver cobalt_qube_led_driver = { .probe = cobalt_qube_led_probe, .remove = cobalt_qube_led_remove, .driver = { .name = "cobalt-qube-leds", }, }; module_platform_driver(cobalt_qube_led_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Front LED support for Cobalt Server"); MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); MODULE_ALIAS("platform:cobalt-qube-leds");