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/*
* Copyright (C) 2010 Samsung Electronics Co. Ltd. All Rights Reserved.
* Author: Rom Lemarchand <rlemarchand@sta.samsung.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/init.h>
#include <linux/gpio.h>
#include <linux/earlysuspend.h>
#include <linux/bln.h>
#include <asm/mach-types.h>
#include "herring.h"
static int led_gpios[] = { 2, 3, 6, 7 };
static void herring_touchkey_led_onoff(int onoff)
{
int i;
for (i = 0; i < ARRAY_SIZE(led_gpios); i++)
gpio_direction_output(S5PV210_GPJ3(led_gpios[i]), !!onoff);
}
#ifdef CONFIG_GENERIC_BLN
static void herring_touchkey_bln_enable(void)
{
herring_touchkey_led_onoff(1);
}
static void herring_touchkey_bln_disable(void)
{
herring_touchkey_led_onoff(0);
}
static struct bln_implementation herring_touchkey_bln = {
.enable = herring_touchkey_bln_enable,
.disable = herring_touchkey_bln_disable,
};
#endif
static void herring_touchkey_led_early_suspend(struct early_suspend *h)
{
herring_touchkey_led_onoff(0);
}
static void herring_touchkey_led_late_resume(struct early_suspend *h)
{
herring_touchkey_led_onoff(1);
}
static struct early_suspend early_suspend = {
.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1,
.suspend = herring_touchkey_led_early_suspend,
.resume = herring_touchkey_led_late_resume,
};
static int __init herring_init_touchkey_led(void)
{
int i;
int ret = 0;
u32 gpio;
if (!machine_is_herring() || !herring_is_tft_dev())
return 0;
for (i = 0; i < ARRAY_SIZE(led_gpios); i++) {
gpio = S5PV210_GPJ3(led_gpios[i]);
ret = gpio_request(gpio, "touchkey led");
if (ret) {
pr_err("Failed to request touchkey led gpio %d\n", i);
goto err_req;
}
s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
s3c_gpio_slp_cfgpin(gpio, S3C_GPIO_SLP_PREV);
s3c_gpio_slp_setpull_updown(gpio, S3C_GPIO_PULL_NONE);
}
herring_touchkey_led_onoff(1);
register_early_suspend(&early_suspend);
#ifdef CONFIG_GENERIC_BLN
register_bln_implementation(&herring_touchkey_bln);
#endif
return 0;
err_req:
while (--i >= 0)
gpio_free(S5PV210_GPJ3(led_gpios[i]));
return ret;
}
device_initcall(herring_init_touchkey_led);
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