diff options
| author | Thomas Chou <thomas@wytron.com.tw> | 2010-04-30 11:34:14 +0800 |
|---|---|---|
| committer | Scott McNutt <smcnutt@psyent.com> | 2010-05-28 10:56:03 -0400 |
| commit | 3e6b86b5552840bb4147871a753840eb3923374c (patch) | |
| tree | e99778f2e762cf8f52898a81ff13480de1939f99 /drivers/misc/gpio_led.c | |
| parent | cedd341d551b6b705e97ab1953a87575b9ff9ef9 (diff) | |
| download | u-boot-imx-3e6b86b5552840bb4147871a753840eb3923374c.zip u-boot-imx-3e6b86b5552840bb4147871a753840eb3923374c.tar.gz u-boot-imx-3e6b86b5552840bb4147871a753840eb3923374c.tar.bz2 | |
misc: add gpio based status led driver
This patch adds a status led driver followed the GPIO access
conventions of Linux. The led mask is used to specify the gpio pin.
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Tested-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'drivers/misc/gpio_led.c')
| -rw-r--r-- | drivers/misc/gpio_led.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/misc/gpio_led.c b/drivers/misc/gpio_led.c new file mode 100644 index 0000000..acd6a90 --- /dev/null +++ b/drivers/misc/gpio_led.c @@ -0,0 +1,30 @@ +/* + * Status LED driver based on GPIO access conventions of Linux + * + * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <common.h> +#include <status_led.h> +#include <asm/gpio.h> + +/* assume led is active low */ + +void __led_init(led_id_t mask, int state) +{ + gpio_direction_output(mask, (state == STATUS_LED_ON) ? 0 : 1); +} + +void __led_set(led_id_t mask, int state) +{ + gpio_set_value(mask, (state == STATUS_LED_ON) ? 0 : 1); +} + +void __led_toggle(led_id_t mask) +{ + gpio_set_value(mask, !gpio_get_value(mask)); +} |