leds: Add rb532 LED driver for the User LED
Phil Sutter [Thu, 22 Jan 2009 18:35:48 +0000 (19:35 +0100)]
Mikrotik built six LEDs into the Routerboard 532, from which one is
destined for custom use, the so called "User LED". This patch adds a
driver for it, based on the LEDs class.

Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

drivers/leds/Kconfig
drivers/leds/Makefile
drivers/leds/leds-rb532.c [new file with mode: 0644]

index 89ea7ef..db5e6a6 100644 (file)
@@ -31,6 +31,13 @@ config LEDS_LOCOMO
          This option enables support for the LEDs on Sharp Locomo.
          Zaurus models SL-5500 and SL-5600.
 
+config LEDS_MIKROTIK_RB532
+       tristate "LED Support for Mikrotik Routerboard 532"
+       depends on LEDS_CLASS && MIKROTIK_RB532
+       help
+         This option enables support for the so called "User LED" of
+         Mikrotik's Routerboard 532.
+
 config LEDS_S3C24XX
        tristate "LED Support for Samsung S3C24XX GPIO LEDs"
        depends on LEDS_CLASS && ARCH_S3C2410
index 584a3f6..017f69a 100644 (file)
@@ -7,6 +7,7 @@ obj-$(CONFIG_LEDS_TRIGGERS)             += led-triggers.o
 # LED Platform Drivers
 obj-$(CONFIG_LEDS_ATMEL_PWM)           += leds-atmel-pwm.o
 obj-$(CONFIG_LEDS_LOCOMO)              += leds-locomo.o
+obj-$(CONFIG_LEDS_MIKROTIK_RB532)      += leds-rb532.o
 obj-$(CONFIG_LEDS_S3C24XX)             += leds-s3c24xx.o
 obj-$(CONFIG_LEDS_AMS_DELTA)           += leds-ams-delta.o
 obj-$(CONFIG_LEDS_NET48XX)             += leds-net48xx.o
diff --git a/drivers/leds/leds-rb532.c b/drivers/leds/leds-rb532.c
new file mode 100644 (file)
index 0000000..c3525f3
--- /dev/null
@@ -0,0 +1,77 @@
+/*
+ * LEDs driver for the "User LED" on Routerboard532
+ *
+ * Copyright (C) 2009 Phil Sutter <n0-1@freewrt.org>
+ *
+ * Based on leds-cobalt-qube.c by Florian Fainelly and
+ * rb-diag.c (my own standalone driver for both LED and
+ * button of Routerboard532).
+ */
+
+#include <linux/leds.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <asm/mach-rc32434/gpio.h>
+#include <asm/mach-rc32434/rb.h>
+
+static void rb532_led_set(struct led_classdev *cdev,
+                          enum led_brightness brightness)
+{
+       if (brightness)
+               set_latch_u5(LO_ULED, 0);
+
+       else
+               set_latch_u5(0, LO_ULED);
+}
+
+static enum led_brightness rb532_led_get(struct led_classdev *cdev)
+{
+       return (get_latch_u5() & LO_ULED) ? LED_FULL : LED_OFF;
+}
+
+static struct led_classdev rb532_uled = {
+       .name = "uled",
+       .brightness_set = rb532_led_set,
+       .brightness_get = rb532_led_get,
+       .default_trigger = "nand-disk",
+};
+
+static int __devinit rb532_led_probe(struct platform_device *pdev)
+{
+       return led_classdev_register(&pdev->dev, &rb532_uled);
+}
+
+static int __devexit rb532_led_remove(struct platform_device *pdev)
+{
+       led_classdev_unregister(&rb532_uled);
+       return 0;
+}
+
+static struct platform_driver rb532_led_driver = {
+       .probe = rb532_led_probe,
+       .remove = __devexit_p(rb532_led_remove),
+       .driver = {
+               .name = "rb532-led",
+               .owner = THIS_MODULE,
+       },
+};
+
+static int __init rb532_led_init(void)
+{
+       return platform_driver_register(&rb532_led_driver);
+}
+
+static void __exit rb532_led_exit(void)
+{
+       platform_driver_unregister(&rb532_led_driver);
+}
+
+module_init(rb532_led_init);
+module_exit(rb532_led_exit);
+
+MODULE_ALIAS("platform:rb532-led");
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("User LED support for Routerboard532");
+MODULE_AUTHOR("Phil Sutter <n0-1@freewrt.org>");