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/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Backlight passthru for x86 platforms */
#include "common.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "lid_switch.h"
/**
* Update backlight state.
*/
static void update_backlight(void)
{
/* Only enable the backlight if the lid is open */
if (gpio_get_level(GPIO_PCH_BKLTEN) && lid_is_open())
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
else
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
}
DECLARE_HOOK(HOOK_LID_CHANGE, update_backlight, HOOK_PRIO_DEFAULT);
/**
* Initialize backlight module.
*/
static void backlight_init(void)
{
update_backlight();
gpio_enable_interrupt(GPIO_PCH_BKLTEN);
}
DECLARE_HOOK(HOOK_INIT, backlight_init, HOOK_PRIO_DEFAULT);
void backlight_interrupt(enum gpio_signal signal)
{
update_backlight();
}
/**
* Host command to toggle backlight.
*/
static int switch_command_enable_backlight(struct host_cmd_handler_args *args)
{
const struct ec_params_switch_enable_backlight *p = args->params;
gpio_set_level(GPIO_ENABLE_BACKLIGHT, p->enabled);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_SWITCH_ENABLE_BKLIGHT,
switch_command_enable_backlight, 0);
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