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https://github.com/Telecominfraproject/OpenCellular.git
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c7559fea4e
This patch adds an interrupt handler for a tablet switch and an init hook to enable the interrupt. The handler does the typical tasks for convertible devices: 1. sets tablet mode then 2. disables peripherals if tablet mode is on. Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org> BUG=b:77298177 BRANCH=none TEST=buildall. Verify on Nami. Change-Id: If7fb5ea15f388d2b6084d800d2bc05efafd1945e Reviewed-on: https://chromium-review.googlesource.com/1043057 Commit-Ready: Daisuke Nojiri <dnojiri@chromium.org> Tested-by: Daisuke Nojiri <dnojiri@chromium.org> Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* Copyright 2016 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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#include "console.h"
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#include "gpio.h"
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#include "hooks.h"
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#include "lid_angle.h"
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#include "tablet_mode.h"
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#include "timer.h"
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#define CPRINTS(format, args...) cprints(CC_MOTION_LID, format, ## args)
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#define CPRINTF(format, args...) cprintf(CC_MOTION_LID, format, ## args)
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/* 1: in tablet mode. 0: otherwise */
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static int tablet_mode = 1;
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int tablet_get_mode(void)
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{
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return tablet_mode;
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}
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void tablet_set_mode(int mode)
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{
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if (tablet_mode == mode)
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return;
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tablet_mode = mode;
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CPRINTS("tablet mode %sabled\n", mode ? "en" : "dis");
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hook_notify(HOOK_TABLET_MODE_CHANGE);
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}
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/* This ifdef can be removed once we clean up past projects which do own init */
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#ifdef CONFIG_TABLET_SWITCH
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#ifndef TABLET_MODE_GPIO_L
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#error TABLET_MODE_GPIO_L must be defined
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#endif
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static void tablet_mode_debounce(void)
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{
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/* We won't reach here on boards without a dedicated tablet switch */
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tablet_set_mode(!gpio_get_level(TABLET_MODE_GPIO_L));
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/* Then, we disable peripherals only when the lid reaches 360 position.
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* (It's probably already disabled by motion_sense_task.)
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* We deliberately do not enable peripherals when the lid is leaving
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* 360 position. Instead, we let motion_sense_task enable it once it
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* reaches laptop zone (180 or less). */
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if (tablet_mode)
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lid_angle_peripheral_enable(0);
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}
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DECLARE_DEFERRED(tablet_mode_debounce);
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#define TABLET_DEBOUNCE_US (30 * MSEC) /* Debounce time for tablet switch */
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void tablet_mode_isr(enum gpio_signal signal)
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{
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hook_call_deferred(&tablet_mode_debounce_data, TABLET_DEBOUNCE_US);
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}
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static void tablet_mode_init(void)
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{
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gpio_enable_interrupt(TABLET_MODE_GPIO_L);
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/* Ensure tablet mode is initialized according to the hardware state
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* so that the cached state reflects reality. */
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tablet_mode_debounce();
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}
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DECLARE_HOOK(HOOK_INIT, tablet_mode_init, HOOK_PRIO_DEFAULT);
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#endif
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