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misc: add gpio based status led driver

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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>
This commit is contained in:
Thomas Chou 2010-04-30 11:34:14 +08:00 • committed by Scott McNutt
parent cedd341d55
commit 3e6b86b555
2 changed files with 31 additions and 0 deletions
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1
drivers/misc/Makefile
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@ -28,6 +28,7 @@ LIB := $(obj)libmisc.a
COBJS-$(CONFIG_ALI152X) += ali512x.o COBJS-$(CONFIG_ALI152X) += ali512x.o
COBJS-$(CONFIG_DS4510) += ds4510.o COBJS-$(CONFIG_DS4510) += ds4510.o
COBJS-$(CONFIG_FSL_LAW) += fsl_law.o COBJS-$(CONFIG_FSL_LAW) += fsl_law.o
COBJS-$(CONFIG_GPIO_LED) += gpio_led.o
COBJS-$(CONFIG_NS87308) += ns87308.o COBJS-$(CONFIG_NS87308) += ns87308.o
COBJS-$(CONFIG_STATUS_LED) += status_led.o COBJS-$(CONFIG_STATUS_LED) += status_led.o
COBJS-$(CONFIG_TWL4030_LED) += twl4030_led.o COBJS-$(CONFIG_TWL4030_LED) += twl4030_led.o

30
drivers/misc/gpio_led.c Normal file
View file

@ -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));
}