OMAP3: RX-51: support sleep indicator LEDs

The sleep indicator LEDs can be enabled/disabled by toggling GPIO162.
Use the LED GPIO class to export this LED functionality to userspace.

To enable:

  # echo 1 > /sys/class/leds/sleep_ind/brightness

To disable:

  # echo 0 > /sys/class/leds/sleep_ind/brightness

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/board-rx51.c b/arch/arm/mach-omap2/board-rx51.c
index 6a49f916103d..26b70dab28cc 100644
--- a/arch/arm/mach-omap2/board-rx51.c
+++ b/arch/arm/mach-omap2/board-rx51.c
@@ -16,6 +16,7 @@
 #include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/leds.h>
 
 #include <mach/hardware.h>
 #include <asm/mach-types.h>
@@ -31,8 +32,30 @@
 
 #include "mux.h"
 
+#define RX51_GPIO_SLEEP_IND 162
+
 struct omap_sdrc_params *rx51_get_sdram_timings(void);
 
+static struct gpio_led gpio_leds[] = {
+        {
+                .name   = "sleep_ind",
+                .gpio   = RX51_GPIO_SLEEP_IND,
+        },
+};
+
+static struct gpio_led_platform_data gpio_led_info = {
+        .leds           = gpio_leds,
+        .num_leds       = ARRAY_SIZE(gpio_leds),
+};
+
+static struct platform_device leds_gpio = {
+        .name   = "leds-gpio",
+        .id     = -1,
+        .dev    = {
+                .platform_data  = &gpio_led_info,
+        },
+};
+
 static struct omap_lcd_config rx51_lcd_config = {
         .ctrl_name      = "internal",
 };
@@ -88,6 +111,8 @@ static void __init rx51_init(void)
         /* Ensure SDRC pins are mux'd for self-refresh */
         omap_mux_init_signal("sdrc_cke0", OMAP_PIN_OUTPUT);
         omap_mux_init_signal("sdrc_cke1", OMAP_PIN_OUTPUT);
+
+        platform_device_register(&leds_gpio);
 }
 
 static void __init rx51_map_io(void)