From 45bc5c1a2135eaae05978d371cff17fb810b9951 Mon Sep 17 00:00:00 2001 From: Randall Spangler Date: Tue, 23 Apr 2013 17:02:07 -0700 Subject: Split out power button code from switch.c The power button code is platform-independent. This change splits the code out of the LM4 switch.c module so that a subseqent change to STM32 platforms can start using it. BUG=chrome-os-partner:18945 BRANCH=none TEST=manual 1. Power+refresh+esc goes to recovery mode, 2. Press power button at recovery screen turns off. 3. With system off, power button turns system on. 4. Press power button for a second; screen locks. 5. Press power button while typing; blocks keystrokes while it's pressed. 6. Hold power button down for 8 sec; system forced to shutdown. 7. From EC console, with system on: hostevent clear hostevent -> event 0x04 is clear press power button hostevent -> event 0x04 is set 8. From EC console, with system off: powerbtn -> system turns on powerbtn 5000 -> system turns off, just like power button was held for 5 sec Change-Id: If2a9b02514a201e1d03c857d128e2ccab51a16ef Signed-off-by: Randall Spangler Reviewed-on: https://gerrit.chromium.org/gerrit/49217 Reviewed-by: Bill Richardson --- board/link/board.c | 3 +- board/link/board.h | 1 + chip/lm4/switch.c | 184 +++++++++++----------------------------------- common/build.mk | 1 + common/hooks.c | 1 + common/keyboard_8042.c | 62 +++++++++------- common/lid_switch.c | 1 + common/power_button.c | 135 ++++++++++++++++++++++++++++++++++ core/cortex-m/ec.lds.S | 4 + core/cortex-m/link_defs.h | 2 + include/hooks.h | 10 +++ include/keyboard_8042.h | 5 -- include/power_button.h | 27 +++++++ 13 files changed, 261 insertions(+), 175 deletions(-) create mode 100644 common/power_button.c create mode 100644 include/power_button.h diff --git a/board/link/board.c b/board/link/board.c index ba1a26679d..28ff9b3a14 100644 --- a/board/link/board.c +++ b/board/link/board.c @@ -14,6 +14,7 @@ #include "lid_switch.h" #include "lm4_adc.h" #include "peci.h" +#include "power_button.h" #include "registers.h" #include "switch.h" #include "temp_sensor.h" @@ -26,7 +27,7 @@ const struct gpio_info gpio_list[GPIO_COUNT] = { /* Inputs with interrupt handlers are first for efficiency */ {"POWER_BUTTON_L", LM4_GPIO_K, (1<<7), GPIO_INT_BOTH, - switch_interrupt}, + power_button_interrupt}, {"LID_OPEN", LM4_GPIO_K, (1<<5), GPIO_INT_BOTH, lid_interrupt}, /* Other inputs */ diff --git a/board/link/board.h b/board/link/board.h index e0c4170c9b..2cbd12d643 100644 --- a/board/link/board.h +++ b/board/link/board.h @@ -32,6 +32,7 @@ #define CONFIG_ONEWIRE #define CONFIG_ONEWIRE_LED #define CONFIG_PECI +#define CONFIG_POWER_BUTTON #define CONFIG_PWM #define CONFIG_TEMP_SENSOR #define CONFIG_TMP006 diff --git a/chip/lm4/switch.c b/chip/lm4/switch.c index f323c81060..b461d1a63c 100644 --- a/chip/lm4/switch.c +++ b/chip/lm4/switch.c @@ -15,6 +15,7 @@ #include "keyboard_protocol.h" #include "keyboard_scan.h" #include "lid_switch.h" +#include "power_button.h" #include "pwm.h" #include "switch.h" #include "system.h" @@ -43,7 +44,6 @@ * @S0 make code break code */ /* TODO: link to full power button / lid switch state machine description. */ -#define PWRBTN_DEBOUNCE_US (30 * MSEC) /* Debounce time for power button */ #define PWRBTN_DELAY_T0 (32 * MSEC) /* 32ms (PCH requires >16ms) */ #define PWRBTN_DELAY_T1 (4 * SECOND - PWRBTN_DELAY_T0) /* 4 secs - t0 */ /* @@ -109,8 +109,6 @@ static uint64_t tnext_state; static uint64_t tdebounce_pwr; static uint8_t *memmap_switches; -static int debounced_power_pressed; -static int simulate_power_pressed; /** * Update status of non-debounced switches. @@ -147,23 +145,6 @@ static void set_pwrbtn_to_pch(int high) gpio_set_level(GPIO_PCH_PWRBTN_L, high); } -/** - * Get raw power button signal state. - * - * @return 1 if power button is pressed, 0 if not pressed. - */ -static int raw_power_button_pressed(void) -{ - if (simulate_power_pressed) - return 1; - - /* Ignore power button if lid is closed */ - if (!lid_is_open()) - return 0; - - return gpio_get_level(GPIO_POWER_BUTTON_L) ? 0 : 1; -} - static void update_backlight(void) { /* Only enable the backlight if the lid is open */ @@ -181,20 +162,10 @@ static void update_backlight(void) */ static void power_button_pressed(uint64_t tnow) { - if (debounced_power_pressed == 1) { - CPRINTF("[%T PB already pressed]\n"); - return; - } - CPRINTF("[%T PB pressed]\n"); - debounced_power_pressed = 1; pwrbtn_state = PWRBTN_STATE_PRESSED; tnext_state = tnow; *memmap_switches |= EC_SWITCH_POWER_BUTTON_PRESSED; -#ifdef HAS_TASK_KEYPROTO - keyboard_set_power_button(1); -#endif - host_set_single_event(EC_HOST_EVENT_POWER_BUTTON); } /** @@ -202,52 +173,10 @@ static void power_button_pressed(uint64_t tnow) */ static void power_button_released(uint64_t tnow) { - if (debounced_power_pressed == 0) { - CPRINTF("[%T PB already released]\n"); - return; - } - CPRINTF("[%T PB released]\n"); - debounced_power_pressed = 0; pwrbtn_state = PWRBTN_STATE_RELEASED; tnext_state = tnow; *memmap_switches &= ~EC_SWITCH_POWER_BUTTON_PRESSED; -#ifdef HAS_TASK_KEYPROTO - keyboard_set_power_button(0); -#endif -} - -/** - * Handle debounced power button changing state. - */ -static void power_button_changed(uint64_t tnow) -{ - if (pwrbtn_state == PWRBTN_STATE_BOOT_KB_RESET || - pwrbtn_state == PWRBTN_STATE_INIT_ON || - pwrbtn_state == PWRBTN_STATE_LID_OPEN || - pwrbtn_state == PWRBTN_STATE_WAS_OFF) { - /* Ignore all power button changes during an initial pulse */ - CPRINTF("[%T PB ignoring change]\n"); - return; - } - - if (raw_power_button_pressed()) { - /* Power button pressed */ - power_button_pressed(tnow); - } else { - /* Power button released */ - if (pwrbtn_state == PWRBTN_STATE_EAT_RELEASE) { - /* - * Ignore the first power button release if we already - * told the PCH the power button was released. - */ - CPRINTF("[%T PB ignoring release]\n"); - pwrbtn_state = PWRBTN_STATE_IDLE; - return; - } - - power_button_released(tnow); - } } /** @@ -257,16 +186,13 @@ static void set_initial_pwrbtn_state(void) { uint32_t reset_flags = system_get_reset_flags(); - /* Set debounced power button state to initial button state */ - debounced_power_pressed = raw_power_button_pressed(); - if (system_jumped_to_this_image() && chipset_in_state(CHIPSET_STATE_ON)) { /* * Jumped to this image while the chipset was already on, so * simply reflect the actual power button state. */ - if (debounced_power_pressed) { + if (power_button_is_pressed()) { *memmap_switches |= EC_SWITCH_POWER_BUTTON_PRESSED; CPRINTF("[%T PB init-jumped-held]\n"); set_pwrbtn_to_pch(0); @@ -288,7 +214,7 @@ static void set_initial_pwrbtn_state(void) */ CPRINTF("[%T PB init-off]\n"); set_pwrbtn_to_pch(1); - if (debounced_power_pressed) + if (power_button_is_pressed()) pwrbtn_state = PWRBTN_STATE_EAT_RELEASE; else pwrbtn_state = PWRBTN_STATE_IDLE; @@ -386,7 +312,7 @@ static void state_machine(uint64_t tnow) set_pwrbtn_to_pch(0); tnext_state = get_time().val + PWRBTN_INITIAL_US; - if (debounced_power_pressed) { + if (power_button_is_pressed()) { *memmap_switches |= EC_SWITCH_POWER_BUTTON_PRESSED; if (system_get_reset_flags() & RESET_FLAG_RESET_PIN) @@ -405,7 +331,7 @@ static void state_machine(uint64_t tnow) * recovery combination doesn't cause the chipset to shut back * down. */ set_pwrbtn_to_pch(1); - if (raw_power_button_pressed()) + if (power_button_is_pressed()) pwrbtn_state = PWRBTN_STATE_EAT_RELEASE; else pwrbtn_state = PWRBTN_STATE_IDLE; @@ -413,7 +339,7 @@ static void state_machine(uint64_t tnow) case PWRBTN_STATE_WAS_OFF: /* Done stretching initial power button signal, so show the * true power button state to the PCH. */ - if (raw_power_button_pressed()) { + if (power_button_is_pressed()) { /* User is still holding the power button */ pwrbtn_state = PWRBTN_STATE_HELD; } else { @@ -437,22 +363,6 @@ void switch_task(void) while (1) { t = get_time().val; - /* Handle debounce timeout for power button */ - if (tdebounce_pwr && t >= tdebounce_pwr) { - tdebounce_pwr = 0; - - /* - * Re-enable keyboard scanning if the power button is - * no longer pressed. - */ - if (!raw_power_button_pressed()) - keyboard_scan_enable(1); - - if (raw_power_button_pressed() != - debounced_power_pressed) - power_button_changed(t); - } - /* Handle non-debounced switches */ update_other_switches(); @@ -537,22 +447,47 @@ static void switch_lid_change(void) } DECLARE_HOOK(HOOK_LID_CHANGE, switch_lid_change, HOOK_PRIO_DEFAULT); -void switch_interrupt(enum gpio_signal signal) +/** + * Handle debounced power button changing state. + */ +static void power_button_changed(void) { - /* Reset debounce time for the changed signal */ - switch (signal) { - case GPIO_POWER_BUTTON_L: - /* Reset power button debounce time */ - tdebounce_pwr = get_time().val + PWRBTN_DEBOUNCE_US; - if (raw_power_button_pressed()) { + if (pwrbtn_state == PWRBTN_STATE_BOOT_KB_RESET || + pwrbtn_state == PWRBTN_STATE_INIT_ON || + pwrbtn_state == PWRBTN_STATE_LID_OPEN || + pwrbtn_state == PWRBTN_STATE_WAS_OFF) { + /* Ignore all power button changes during an initial pulse */ + CPRINTF("[%T PB ignoring change]\n"); + return; + } + + if (power_button_is_pressed()) { + /* Power button pressed */ + power_button_pressed(get_time().val); + } else { + /* Power button released */ + if (pwrbtn_state == PWRBTN_STATE_EAT_RELEASE) { /* - * Disable the matrix scan as soon as possible to - * reduce the risk of false-reboot triggered by those - * keys on the same column with refresh key. + * Ignore the first power button release if we already + * told the PCH the power button was released. */ - keyboard_scan_enable(0); + CPRINTF("[%T PB ignoring release]\n"); + pwrbtn_state = PWRBTN_STATE_IDLE; + return; } - break; + + power_button_released(get_time().val); + } + + /* Wake the switch task */ + task_wake(TASK_ID_SWITCH); +} +DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, power_button_changed, HOOK_PRIO_DEFAULT); + +void switch_interrupt(enum gpio_signal signal) +{ + /* Reset debounce time for the changed signal */ + switch (signal) { case GPIO_PCH_BKLTEN: update_backlight(); break; @@ -574,39 +509,6 @@ void switch_interrupt(enum gpio_signal signal) task_wake(TASK_ID_SWITCH); } -/*****************************************************************************/ -/* Console commands */ - -static int command_powerbtn(int argc, char **argv) -{ - int ms = PWRBTN_INITIAL_US / MSEC; /* Press duration in ms */ - char *e; - - if (argc > 1) { - ms = strtoi(argv[1], &e, 0); - if (*e) - return EC_ERROR_PARAM1; - } - - ccprintf("Simulating %d ms power button press.\n", ms); - simulate_power_pressed = 1; - tdebounce_pwr = get_time().val + PWRBTN_DEBOUNCE_US; - task_wake(TASK_ID_SWITCH); - - msleep(ms); - - ccprintf("Simulating power button release.\n"); - simulate_power_pressed = 0; - tdebounce_pwr = get_time().val + PWRBTN_DEBOUNCE_US; - task_wake(TASK_ID_SWITCH); - - return EC_SUCCESS; -} -DECLARE_CONSOLE_COMMAND(powerbtn, command_powerbtn, - "[msec]", - "Simulate power button press", - NULL); - static int command_mmapinfo(int argc, char **argv) { uint8_t *memmap_switches = host_get_memmap(EC_MEMMAP_SWITCHES); diff --git a/common/build.mk b/common/build.mk index 3eb16d01a9..9b3297c7bf 100644 --- a/common/build.mk +++ b/common/build.mk @@ -30,6 +30,7 @@ common-$(CONFIG_LID_SWITCH)+=lid_switch.o common-$(CONFIG_LP5562)+=lp5562.o lp5562_battery_led.o common-$(CONFIG_LPC)+=port80.o common-$(CONFIG_ONEWIRE_LED)+=onewire_led.o +common-$(CONFIG_POWER_BUTTON)+=power_button.o common-$(CONFIG_PSTORE)+=pstore_commands.o common-$(CONFIG_SMART_BATTERY)+=smart_battery.o smart_battery_stub.o common-$(HAS_TASK_CHIPSET)+=chipset.o diff --git a/common/hooks.c b/common/hooks.c index 3597a77ea8..d239e3abc2 100644 --- a/common/hooks.c +++ b/common/hooks.c @@ -42,6 +42,7 @@ static const struct hook_ptrs hook_list[] = { {__hooks_chipset_shutdown, __hooks_chipset_shutdown_end}, {__hooks_ac_change, __hooks_ac_change_end}, {__hooks_lid_change, __hooks_lid_change_end}, + {__hooks_pwrbtn_change, __hooks_pwrbtn_change_end}, {__hooks_tick, __hooks_tick_end}, {__hooks_second, __hooks_second_end}, }; diff --git a/common/keyboard_8042.c b/common/keyboard_8042.c index a65c935558..8e2646cb4a 100644 --- a/common/keyboard_8042.c +++ b/common/keyboard_8042.c @@ -15,6 +15,7 @@ #include "keyboard_protocol.h" #include "lightbar.h" #include "lpc.h" +#include "power_button.h" #include "queue.h" #include "registers.h" #include "shared_mem.h" @@ -831,34 +832,6 @@ static void keyboard_special(uint16_t k) } } - -void keyboard_set_power_button(int pressed) -{ - enum scancode_set_list code_set; - uint8_t code[2][2][3] = { - { /* set 1 */ - {0xe0, 0xde}, /* break */ - {0xe0, 0x5e}, /* make */ - }, { /* set 2 */ - {0xe0, 0xf0, 0x37}, /* break */ - {0xe0, 0x37}, /* make */ - } - }; - - power_button_pressed = pressed; - - /* Only send the scan code if main chipset is fully awake */ - if (!chipset_in_state(CHIPSET_STATE_ON)) - return; - - code_set = acting_code_set(scancode_set); - if (keystroke_enabled) { - i8042_send_to_host( - (code_set == SCANCODE_SET_2 && !pressed) ? 3 : 2, - code[code_set - SCANCODE_SET_1][pressed]); - } -} - void keyboard_protocol_task(void) { int wait = -1; @@ -1097,3 +1070,36 @@ static void keyboard_restore_state(void) } } DECLARE_HOOK(HOOK_INIT, keyboard_restore_state, HOOK_PRIO_DEFAULT); + +/** + * Handle power button changing state. + */ +static void keyboard_power_button(void) +{ + enum scancode_set_list code_set; + uint8_t code[2][2][3] = { + { /* set 1 */ + {0xe0, 0xde}, /* break */ + {0xe0, 0x5e}, /* make */ + }, { /* set 2 */ + {0xe0, 0xf0, 0x37}, /* break */ + {0xe0, 0x37}, /* make */ + } + }; + + power_button_pressed = power_button_is_pressed(); + + /* + * Only send the scan code if main chipset is fully awake and + * keystrokes are enabled. + */ + if (!chipset_in_state(CHIPSET_STATE_ON) || !keystroke_enabled) + return; + + code_set = acting_code_set(scancode_set); + i8042_send_to_host( + (code_set == SCANCODE_SET_2 && !power_button_pressed) ? 3 : 2, + code[code_set - SCANCODE_SET_1][power_button_pressed]); +} +DECLARE_HOOK(HOOK_POWER_BUTTON_CHANGE, keyboard_power_button, + HOOK_PRIO_DEFAULT); diff --git a/common/lid_switch.c b/common/lid_switch.c index 0f83f7c318..8e1e1bf082 100644 --- a/common/lid_switch.c +++ b/common/lid_switch.c @@ -10,6 +10,7 @@ #include "gpio.h" #include "hooks.h" #include "host_command.h" +#include "lid_switch.h" #include "timer.h" #include "util.h" diff --git a/common/power_button.c b/common/power_button.c new file mode 100644 index 0000000000..c26fb8d5d4 --- /dev/null +++ b/common/power_button.c @@ -0,0 +1,135 @@ +/* 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. + */ + +/* Power button module for Chrome EC */ + +#include "common.h" +#include "console.h" +#include "gpio.h" +#include "hooks.h" +#include "host_command.h" +#include "keyboard_scan.h" +#include "lid_switch.h" +#include "power_button.h" +#include "timer.h" +#include "util.h" + +/* Console output macros */ +#define CPUTS(outstr) cputs(CC_SWITCH, outstr) +#define CPRINTF(format, args...) cprintf(CC_SWITCH, format, ## args) + +#define PWRBTN_DEBOUNCE_US (30 * MSEC) /* Debounce time for power button */ + +static int debounced_power_pressed; /* Debounced power button state */ +static int simulate_power_pressed; + +/** + * Get raw power button signal state. + * + * @return 1 if power button is pressed, 0 if not pressed. + */ +static int raw_power_button_pressed(void) +{ + if (simulate_power_pressed) + return 1; + + /* Ignore power button if lid is closed */ + if (!lid_is_open()) + return 0; + + return gpio_get_level(GPIO_POWER_BUTTON_L) ? 0 : 1; +} + +int power_button_is_pressed(void) +{ + return debounced_power_pressed; +} + +/** + * Handle power button initialization. + */ +static void power_button_init(void) +{ + if (raw_power_button_pressed()) + debounced_power_pressed = 1; + + /* Enable interrupts, now that we've initialized */ + gpio_enable_interrupt(GPIO_POWER_BUTTON_L); +} +DECLARE_HOOK(HOOK_INIT, power_button_init, HOOK_PRIO_INIT_POWER_BUTTON); + +/** + * Handle debounced power button changing state. + */ +static void power_button_change_deferred(void) +{ + const int new_pressed = raw_power_button_pressed(); + + /* If power button hasn't changed state, nothing to do */ + if (new_pressed == debounced_power_pressed) + return; + + debounced_power_pressed = new_pressed; + + CPRINTF("[%T power button %s]\n", new_pressed ? "pressed" : "released"); + + /* Re-enable keyboard scanning if power button is no longer pressed */ + if (!new_pressed) + keyboard_scan_enable(1); + + /* Call hooks */ + hook_notify(HOOK_POWER_BUTTON_CHANGE); + + /* Notify host if power button has been pressed */ + if (new_pressed) + host_set_single_event(EC_HOST_EVENT_POWER_BUTTON); +} +DECLARE_DEFERRED(power_button_change_deferred); + +void power_button_interrupt(enum gpio_signal signal) +{ + /* + * If power button is pressed, disable the matrix scan as soon as + * possible to reduce the risk of false-reboot triggered by those keys + * on the same column with refresh key. + */ + if (raw_power_button_pressed()) + keyboard_scan_enable(0); + + /* Reset power button debounce time */ + hook_call_deferred(power_button_change_deferred, PWRBTN_DEBOUNCE_US); +} + +/*****************************************************************************/ +/* Console commands */ + +static int command_powerbtn(int argc, char **argv) +{ + int ms = 200; /* Press duration in ms */ + char *e; + + if (argc > 1) { + ms = strtoi(argv[1], &e, 0); + if (*e) + return EC_ERROR_PARAM1; + } + + ccprintf("Simulating %d ms power button press.\n", ms); + simulate_power_pressed = 1; + hook_call_deferred(power_button_change_deferred, 0); + + msleep(ms); + + ccprintf("Simulating power button release.\n"); + simulate_power_pressed = 0; + hook_call_deferred(power_button_change_deferred, 0); + + return EC_SUCCESS; +} +DECLARE_CONSOLE_COMMAND(powerbtn, command_powerbtn, + "[msec]", + "Simulate power button press", + NULL); + diff --git a/core/cortex-m/ec.lds.S b/core/cortex-m/ec.lds.S index 339ee4f435..9a8f09c9ba 100644 --- a/core/cortex-m/ec.lds.S +++ b/core/cortex-m/ec.lds.S @@ -96,6 +96,10 @@ SECTIONS *(.rodata.HOOK_LID_CHANGE) __hooks_lid_change_end = .; + __hooks_pwrbtn_change = .; + *(.rodata.HOOK_POWER_BUTTON_CHANGE) + __hooks_pwrbtn_change_end = .; + __hooks_tick = .; *(.rodata.HOOK_TICK) __hooks_tick_end = .; diff --git a/core/cortex-m/link_defs.h b/core/cortex-m/link_defs.h index f78a7c46c4..6681d6b371 100644 --- a/core/cortex-m/link_defs.h +++ b/core/cortex-m/link_defs.h @@ -38,6 +38,8 @@ extern const struct hook_data __hooks_ac_change[]; extern const struct hook_data __hooks_ac_change_end[]; extern const struct hook_data __hooks_lid_change[]; extern const struct hook_data __hooks_lid_change_end[]; +extern const struct hook_data __hooks_pwrbtn_change[]; +extern const struct hook_data __hooks_pwrbtn_change_end[]; extern const struct hook_data __hooks_tick[]; extern const struct hook_data __hooks_tick_end[]; extern const struct hook_data __hooks_second[]; diff --git a/include/hooks.h b/include/hooks.h index 084e9bb36b..59f982eaee 100644 --- a/include/hooks.h +++ b/include/hooks.h @@ -25,6 +25,8 @@ enum hook_priority { HOOK_PRIO_INIT_CHIPSET = HOOK_PRIO_FIRST + 2, /* Lid switch inits before power button */ HOOK_PRIO_INIT_LID = HOOK_PRIO_FIRST + 3, + /* Power button inits before chipset and switch */ + HOOK_PRIO_INIT_POWER_BUTTON = HOOK_PRIO_FIRST + 4, }; enum hook_type { @@ -105,6 +107,14 @@ enum hook_type { */ HOOK_LID_CHANGE, + /* + * Power button pressed or released. Based on debounced power button + * state, not raw GPIO input. + * + * Hook routines are called from the chipset task. + */ + HOOK_POWER_BUTTON_CHANGE, + /* * Periodic tick, every HOOK_TICK_INTERVAL. * diff --git a/include/keyboard_8042.h b/include/keyboard_8042.h index a0d3389d11..b0a247893f 100644 --- a/include/keyboard_8042.h +++ b/include/keyboard_8042.h @@ -27,9 +27,4 @@ void keyboard_host_write(int data, int is_cmd); */ void keyboard_state_changed(int row, int col, int is_pressed); -/** - * Send make/break code of power button to host. - */ -void keyboard_set_power_button(int pressed); - #endif /* __CROS_EC_KEYBOARD_8042_H */ diff --git a/include/power_button.h b/include/power_button.h new file mode 100644 index 0000000000..f3da24da9b --- /dev/null +++ b/include/power_button.h @@ -0,0 +1,27 @@ +/* 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. + */ + +/* Power button API for Chrome EC */ + +#ifndef __CROS_EC_POWER_BUTTON_H +#define __CROS_EC_POWER_BUTTON_H + +#include "common.h" + +/** + * Return non-zero if power button is pressed. + * + * Uses the debounced button state, not the raw signal from the GPIO. + */ +int power_button_is_pressed(void); + +/** + * Interrupt handler for power button. + * + * @param signal Signal which triggered the interrupt. + */ +void power_button_interrupt(enum gpio_signal signal); + +#endif /* __CROS_EC_POWER_BUTTON_H */ -- cgit v1.2.1