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Merge "Fix power button being held down for 8 sec"

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Randall Spangler
2012-02-07 09:36:28 -08:00
committed by Gerrit Code Review
parent 730f099c83 7ce07a7835
commit 36d39dbb0d
1 changed files with 11 additions and 14 deletions
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25
chip/lm4/power_button.c
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@@ -28,11 +28,11 @@ struct debounce_isr_t debounce_isr[DEBOUNCE_ISR_ID_MAX];
enum power_button_state {
PWRBTN_STATE_STOPPED = 0,
PWRBTN_STATE_START = 1,
PWRBTN_STATE_T0 = 2,
PWRBTN_STATE_T1 = 3,
PWRBTN_STATE_T2 = 4,
PWRBTN_STATE_STOPPING = 5,
PWRBTN_STATE_START,
PWRBTN_STATE_T0,
PWRBTN_STATE_T1,
PWRBTN_STATE_HELD_DOWN,
PWRBTN_STATE_STOPPING,
};
static enum power_button_state pwrbtn_state = PWRBTN_STATE_STOPPED;
/* The next timestamp to move onto next state if power button is still pressed.
@@ -41,7 +41,6 @@ static timestamp_t pwrbtn_next_ts = {0};
#define PWRBTN_DELAY_T0 32000 /* 32ms */
#define PWRBTN_DELAY_T1 (4000000 - PWRBTN_DELAY_T0) /* 4 secs - t0 */
#define PWRBTN_DELAY_T2 4000000 /* 4 secs */
static void lid_switch_isr(void)
@@ -61,7 +60,7 @@ static void lid_switch_isr(void)
*
* PWRBTN# --- --------- ----
* to PCH |__| |___________|
* t0 t1 t2
* t0 t1 held down
*/
static void set_pwrbtn_to_pch(int high)
{
@@ -88,8 +87,7 @@ static void pwrbtn_sm_stop(void)
static void pwrbtn_sm_handle(timestamp_t current)
{
/* Not the time to move onto next state */
if (pwrbtn_state == PWRBTN_STATE_STOPPED ||
current.val < pwrbtn_next_ts.val)
if (current.val < pwrbtn_next_ts.val)
return;
switch (pwrbtn_state) {
@@ -104,17 +102,16 @@ static void pwrbtn_sm_handle(timestamp_t current)
set_pwrbtn_to_pch(1);
break;
case PWRBTN_STATE_T1:
pwrbtn_next_ts.val = current.val + PWRBTN_DELAY_T2;
pwrbtn_state = PWRBTN_STATE_T2;
pwrbtn_state = PWRBTN_STATE_HELD_DOWN;
set_pwrbtn_to_pch(0);
break;
case PWRBTN_STATE_T2:
/* T2 has passed */
case PWRBTN_STATE_STOPPING:
set_pwrbtn_to_pch(1);
pwrbtn_state = PWRBTN_STATE_STOPPED;
break;
default:
case PWRBTN_STATE_STOPPED:
case PWRBTN_STATE_HELD_DOWN:
/* Do nothing */
break;
}
}