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Fix power button turning system back on after 4 sec

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

BUG=chrome-os-partner:8981
TEST=manual

Turn system on
Hold power button for 5 sec
Let go
System should stay off

Change-Id: I4660108972795d631b7c33926df58513ee09e1c7
This commit is contained in:
Randall Spangler
2012-04-12 14:18:30 -07:00
parent 21c2391e24
commit 9f09fbe42c
1 changed files with 16 additions and 3 deletions
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19
chip/lm4/power_button.c
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@@ -122,8 +122,15 @@ static void state_machine(uint64_t tnow)
switch (pwrbtn_state) {
case PWRBTN_STATE_START:
tnext_state = tnow + PWRBTN_DELAY_T0;
pwrbtn_state = PWRBTN_STATE_T0;
if (chipset_in_state(CHIPSET_STATE_SOFT_OFF)) {
/* Chipset is off, so just pass the true power button
* state to the chipset. */
pwrbtn_state = PWRBTN_STATE_HELD_DOWN;
} else {
/* Chipset is on, so send the chipset a pulse */
tnext_state = tnow + PWRBTN_DELAY_T0;
pwrbtn_state = PWRBTN_STATE_T0;
}
set_pwrbtn_to_pch(0);
break;
case PWRBTN_STATE_T0:
@@ -132,8 +139,14 @@ static void state_machine(uint64_t tnow)
set_pwrbtn_to_pch(1);
break;
case PWRBTN_STATE_T1:
/* If the chipset is already off, don't tell it the power
* button is down; it'll just cause the chipset to turn on
* again. */
if (!chipset_in_state(CHIPSET_STATE_SOFT_OFF))
set_pwrbtn_to_pch(0);
else
uart_printf("[%T PB chipset already off]\n");
pwrbtn_state = PWRBTN_STATE_HELD_DOWN;
set_pwrbtn_to_pch(0);
break;
case PWRBTN_STATE_STOPPING:
set_pwrbtn_to_pch(1);