ARM: S3C2442: RX1950: Add support for LED blinking

Add .gpio_set_blink callback to support HW blinking
available on RX1950

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/arch/arm/mach-s3c2440/mach-rx1950.c b/arch/arm/mach-s3c2440/mach-rx1950.c
index 0f6821ba9b2..22f18d9e2d7 100644
--- a/arch/arm/mach-s3c2440/mach-rx1950.c
+++ b/arch/arm/mach-s3c2440/mach-rx1950.c
@@ -263,6 +263,52 @@ void rx1950_disable_charger(void)
         gpio_direction_output(S3C2410_GPJ(3), 0);
 }
 
+DEFINE_SPINLOCK(rx1950_blink_spin);
+
+static int rx1950_led_blink_set(unsigned gpio, int state,
+        unsigned long *delay_on, unsigned long *delay_off)
+{
+        int blink_gpio, check_gpio;
+
+        switch (gpio) {
+        case S3C2410_GPA(6):
+                blink_gpio = S3C2410_GPA(4);
+                check_gpio = S3C2410_GPA(3);
+                break;
+        case S3C2410_GPA(7):
+                blink_gpio = S3C2410_GPA(3);
+                check_gpio = S3C2410_GPA(4);
+                break;
+        default:
+                return -EINVAL;
+                break;
+        }
+
+        if (delay_on && delay_off && !*delay_on && !*delay_off)
+                *delay_on = *delay_off = 500;
+
+        spin_lock(&rx1950_blink_spin);
+
+        switch (state) {
+        case GPIO_LED_NO_BLINK_LOW:
+        case GPIO_LED_NO_BLINK_HIGH:
+                if (!gpio_get_value(check_gpio))
+                        gpio_set_value(S3C2410_GPJ(6), 0);
+                gpio_set_value(blink_gpio, 0);
+                gpio_set_value(gpio, state);
+                break;
+        case GPIO_LED_BLINK:
+                gpio_set_value(gpio, 0);
+                gpio_set_value(S3C2410_GPJ(6), 1);
+                gpio_set_value(blink_gpio, 1);
+                break;
+        }
+
+        spin_unlock(&rx1950_blink_spin);
+
+        return 0;
+}
+
 static struct gpio_led rx1950_leds_desc[] = {
         {
                 .name                           = "Green",
@@ -287,6 +333,7 @@ static struct gpio_led rx1950_leds_desc[] = {
 static struct gpio_led_platform_data rx1950_leds_pdata = {
         .num_leds       = ARRAY_SIZE(rx1950_leds_desc),
         .leds           = rx1950_leds_desc,
+        .gpio_blink_set = rx1950_led_blink_set,
 };
 
 static struct platform_device rx1950_leds = {
@@ -755,6 +802,13 @@ static void __init rx1950_init_machine(void)
 
         WARN_ON(gpio_request(S3C2410_GPB(1), "LCD power"));
 
+        WARN_ON(gpio_request(S3C2410_GPA(3), "Red blink"));
+        WARN_ON(gpio_request(S3C2410_GPA(4), "Green blink"));
+        WARN_ON(gpio_request(S3C2410_GPJ(6), "LED blink"));
+        gpio_direction_output(S3C2410_GPA(3), 0);
+        gpio_direction_output(S3C2410_GPA(4), 0);
+        gpio_direction_output(S3C2410_GPJ(6), 0);
+
         platform_add_devices(rx1950_devices, ARRAY_SIZE(rx1950_devices));
 
         i2c_register_board_info(0, rx1950_i2c_devices,