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| author | Vasily Khoruzhick <anarsoul@gmail.com> | 2011-01-06 21:52:52 +0200 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2011-03-20 23:14:55 +0000 |
| commit | 62235dcd2ad4f46ea9e5d4f71c5ea3111341c6e8 (patch) | |
| tree | 9e8b605c0f37f71a1d400974aff47e4b5cf06ff3 /arch | |
| parent | fed7fdbef48d513b1a470bc3d76923d156996448 (diff) | |
| download | lwn-62235dcd2ad4f46ea9e5d4f71c5ea3111341c6e8.tar.gz lwn-62235dcd2ad4f46ea9e5d4f71c5ea3111341c6e8.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-s3c2440/mach-rx1950.c | 54 |
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 0f6821ba9b28..22f18d9e2d79 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, |