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.
If you find this solution usefull for other boards / machines / platforms as well, I can try to reimplement it at the SoC camera framework level, or OMAP1 camera interface level.
Created and tested against linux-2.6.35-rc3.
Works on top of patch 5/6, "OMAP1: Amstrad Delta: add support for on-board camera"
Signed-off-by: Janusz Krzysztofik jkrzyszt@tis.icnet.pl --- arch/arm/mach-omap1/board-ams-delta.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+)
--- linux-2.6.35-rc3.orig/arch/arm/mach-omap1/board-ams-delta.c 2010-07-18 02:48:53.000000000 +0200 +++ linux-2.6.35-rc3/arch/arm/mach-omap1/board-ams-delta.c 2010-07-18 02:47:33.000000000 +0200 @@ -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_c }, };
+#if defined(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)
omap_usb_init(&ams_delta_usb_config); omap1_set_camera_info(&ams_delta_camera_platform_data); +#if defined(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