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@xxxxxxxxxxxx>
---
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
--
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