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>

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/mach-omap1/board-ams-delta.c b/arch/arm/mach-omap1/board-ams-delta.c
index 12f7f607ab1f..248e8bb64b6a 100644
--- 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