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6696843708
This code is not LM4-specific, it's x86-specific. So it doesn't
belong in chip/lm4. Put it in its own module rather than leaving it
in switch.c, since some x86 systems may need the power button state
machine but not the backlight-enable passthru.
BUG=chrome-os-partner:18343
BRANCH=none
TEST=Quickly run a magnet over the lid switch; the backlight goes off and then
back on.
Change-Id: I72f7139b73f91539dcfbe6b5cb6d56587ab66fde
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/61595
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Backlight passthru for x86 platforms */
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#include "common.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "host_command.h"
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#include "lid_switch.h"
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/**
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* Update backlight state.
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*/
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static void update_backlight(void)
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{
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/* Only enable the backlight if the lid is open */
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if (gpio_get_level(GPIO_PCH_BKLTEN) && lid_is_open())
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gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
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else
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gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
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}
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DECLARE_HOOK(HOOK_LID_CHANGE, update_backlight, HOOK_PRIO_DEFAULT);
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/**
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* Initialize backlight module.
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*/
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static void backlight_init(void)
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{
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update_backlight();
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gpio_enable_interrupt(GPIO_PCH_BKLTEN);
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}
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DECLARE_HOOK(HOOK_INIT, backlight_init, HOOK_PRIO_DEFAULT);
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void backlight_interrupt(enum gpio_signal signal)
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{
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update_backlight();
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}
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/**
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* Host command to toggle backlight.
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*/
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static int switch_command_enable_backlight(struct host_cmd_handler_args *args)
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{
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const struct ec_params_switch_enable_backlight *p = args->params;
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gpio_set_level(GPIO_ENABLE_BACKLIGHT, p->enabled);
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return EC_RES_SUCCESS;
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}
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DECLARE_HOST_COMMAND(EC_CMD_SWITCH_ENABLE_BKLIGHT,
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switch_command_enable_backlight, 0);
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