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system76/common/power: Fix spurious power button enable

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This commit is contained in:
Jeremy Soller 2020-12-29 10:09:20 -07:00 committed by Jeremy Soller
parent c7827e4a7c
commit 99a0d6861f
1 changed files with 19 additions and 9 deletions
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28
src/board/system76/common/power.c
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@ -362,6 +362,11 @@ void power_cpu_reset(void) {
kbled_reset();
}
static bool power_button_disabled(void) {
// Disable power button if lid is closed and AC is disconnected
return !gpio_get(&LID_SW_N) && gpio_get(&ACIN_N);
}
void power_event(void) {
// Always switch to ds5 if EC is running
if (power_state == POWER_STATE_DEFAULT) {
@ -411,17 +416,22 @@ void power_event(void) {
// Read power switch state
static bool ps_last = true;
bool ps_new = gpio_get(&PWR_SW_N);
// Disable power button if lid is closed and AC is disconnected
if (!lid_state && ac_last) {
ps_new = true;
}
if (!ps_new && ps_last) {
// Ensure press is not spurious
delay_ms(10);
if (gpio_get(&PWR_SW_N) != ps_new) {
DEBUG("%02X: Spurious press\n", main_cycle);
ps_new = ps_last;
} else {
for (int i = 0; i < 100; i++) {
delay_ms(1);
if (gpio_get(&PWR_SW_N) != ps_new) {
DEBUG("%02X: Spurious press\n", main_cycle);
ps_new = ps_last;
break;
} else if (power_button_disabled()) {
// Ignore press when power button disabled
ps_new = ps_last;
break;
}
}
if (ps_new != ps_last) {
DEBUG("%02X: Power switch press\n", main_cycle);
// Enable S5 power if necessary, before sending PWR_BTN