ARM: mach-pxa: retire custom LED code

Signed-off-by: Bryan Wu <bryan.wu@canonical.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/idp.c b/arch/arm/mach-pxa/idp.c
index 6ff466bd43e8..ae1e9977603e 100644
--- a/arch/arm/mach-pxa/idp.c
+++ b/arch/arm/mach-pxa/idp.c
@@ -191,6 +191,87 @@ static void __init idp_map_io(void)
         iotable_init(idp_io_desc, ARRAY_SIZE(idp_io_desc));
 }
 
+/* LEDs */
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+struct idp_led {
+        struct led_classdev     cdev;
+        u8                      mask;
+};
+
+/*
+ * The triggers lines up below will only be used if the
+ * LED triggers are compiled in.
+ */
+static const struct {
+        const char *name;
+        const char *trigger;
+} idp_leds[] = {
+        { "idp:green", "heartbeat", },
+        { "idp:red", "cpu0", },
+};
+
+static void idp_led_set(struct led_classdev *cdev,
+                enum led_brightness b)
+{
+        struct idp_led *led = container_of(cdev,
+                        struct idp_led, cdev);
+        u32 reg = IDP_CPLD_LED_CONTROL;
+
+        if (b != LED_OFF)
+                reg &= ~led->mask;
+        else
+                reg |= led->mask;
+
+        IDP_CPLD_LED_CONTROL = reg;
+}
+
+static enum led_brightness idp_led_get(struct led_classdev *cdev)
+{
+        struct idp_led *led = container_of(cdev,
+                        struct idp_led, cdev);
+
+        return (IDP_CPLD_LED_CONTROL & led->mask) ? LED_OFF : LED_FULL;
+}
+
+static int __init idp_leds_init(void)
+{
+        int i;
+
+        if (!machine_is_pxa_idp())
+                return -ENODEV;
+
+        for (i = 0; i < ARRAY_SIZE(idp_leds); i++) {
+                struct idp_led *led;
+
+                led = kzalloc(sizeof(*led), GFP_KERNEL);
+                if (!led)
+                        break;
+
+                led->cdev.name = idp_leds[i].name;
+                led->cdev.brightness_set = idp_led_set;
+                led->cdev.brightness_get = idp_led_get;
+                led->cdev.default_trigger = idp_leds[i].trigger;
+
+                if (i == 0)
+                        led->mask = IDP_HB_LED;
+                else
+                        led->mask = IDP_BUSY_LED;
+
+                if (led_classdev_register(NULL, &led->cdev) < 0) {
+                        kfree(led);
+                        break;
+                }
+        }
+
+        return 0;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(idp_leds_init);
+#endif
 
 MACHINE_START(PXA_IDP, "Vibren PXA255 IDP")
         /* Maintainer: Vibren Technologies */