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Turn on when power button pressed

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Signed-off-by: Randall Spangler <rspangler@chromium.org>

BUG=chrome-os-partner:7850
TEST=reboot, press power button; system should turn on
reboot, type 'x86power s0'; system should also turn on

Change-Id: Iac114c2655240d8aba81283d12f667f8e64d3ad3
This commit is contained in:
Randall Spangler
2012-02-07 10:33:42 -08:00
parent 36d39dbb0d
commit f214e47717
1 changed files with 17 additions and 22 deletions
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39
common/x86_power.c
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@@ -236,20 +236,6 @@ void x86_power_task(void)
break;
case X86_S5S0:
/* TODO: this should be in response to a power button
* event, not causing one. For initial bringup,
* simulate the event. */
/* Assert power button */
gpio_set_level(GPIO_PCH_PWRBTNn, 0);
/* Wait at least 16ms after asserting PWRBTN#. More
* is better for now, apparently. */
usleep(100000);
/* Release power button */
gpio_set_level(GPIO_PCH_PWRBTNn, 1);
/* Wait for PM_SLP_S3n to be asserted */
wait_in_signals(IN_ALL_PM_SLP_DEASSERTED);
@@ -278,13 +264,17 @@ void x86_power_task(void)
break;
case X86_S5:
#ifdef AUTO_POWER_UP
/* For bringup, power on one second after boot */
/* TODO: remove post-bringup */
usleep(1000000);
state = X86_S5S0;
/* If PM_SLP_S3# is deasserted, system is trying to
* power on. */
if (gpio_get_level(GPIO_PCH_SLP_S3n) == 1) {
state = X86_S5S0;
break;
}
/* Otherwise, steady state; wait for a message */
task_wait_msg(-1);
break;
#endif
case X86_S0:
/* Steady state; wait for a message */
task_wait_msg(-1);
@@ -307,8 +297,13 @@ static int command_x86power(int argc, char **argv)
/* Get state to move to */
if (!strcasecmp(argv[1], "S0")) {
if (state == X86_S5)
state = X86_S5S0;
if (state == X86_S5) {
/* Simulate a 100ms power button press */
uart_puts("Simulating power button press.\n");
gpio_set_level(GPIO_PCH_PWRBTNn, 0);
usleep(100000);
gpio_set_level(GPIO_PCH_PWRBTNn, 1);
}
}
if (current == state)