OMAP1: Amstrad Delta: add camera controlled LEDS trigger

This patch extends the Amstrad Delta camera support with LEDS trigger that can
be used for automatic control of the on-board camera LED. The led turns on
automatically on camera device open and turns off on camera device close.

Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 12f7f60..248e8bb 100644 (file)
--- a/arch/arm/mach-omap1/board-ams-delta.c
+++ b/arch/arm/mach-omap1/board-ams-delta.c
@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/input.h>
 #include <linux/interrupt.h>
+#include <linux/leds.h>
 #include <linux/platform_device.h>
 #include <linux/serial_8250.h>
 
@@ -222,11 +223,30 @@ static struct i2c_board_info ams_delta_camera_board_info[] = {
        },
 };
 
+#ifdef CONFIG_LEDS_TRIGGERS
+DEFINE_LED_TRIGGER(ams_delta_camera_led_trigger);
+
+static int ams_delta_camera_power(struct device *dev, int power)
+{
+       /*
+        * turn on camera LED
+        */
+       if (power)
+               led_trigger_event(ams_delta_camera_led_trigger, LED_FULL);
+       else
+               led_trigger_event(ams_delta_camera_led_trigger, LED_OFF);
+       return 0;
+}
+#else
+#define ams_delta_camera_power NULL
+#endif
+
 static struct soc_camera_link __initdata ams_delta_iclink = {
        .bus_id         = 0,    /* OMAP1 SoC camera bus */
        .i2c_adapter_id = 1,
        .board_info     = &ams_delta_camera_board_info[0],
        .module_name    = "ov6650",
+       .power          = ams_delta_camera_power,
 };
 
 static struct platform_device ams_delta_camera_device = {
@@ -281,6 +301,10 @@ static void __init ams_delta_init(void)
 
        omap1_usb_init(&ams_delta_usb_config);
        omap1_set_camera_info(&ams_delta_camera_platform_data);
+#ifdef CONFIG_LEDS_TRIGGERS
+       led_trigger_register_simple("ams_delta_camera",
+                       &ams_delta_camera_led_trigger);
+#endif
        platform_add_devices(ams_delta_devices, ARRAY_SIZE(ams_delta_devices));
 
 #ifdef CONFIG_AMS_DELTA_FIQ