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touch: pt: support wake-up from 'standby' sleep 

To support system wake-up from 'standby' sleep via single tapping with
sensed touch data, we need to distinguish suspend type between 'mem' and
'standby', and only puts touch device into sleep for 'mem' sleep.  It's
basically a rewriting of suspend/resume hooks, including:

 - Drop easy-wake gesture handling, as we do not support it.
 - Deal with pinctrl state, touch sleep and IRQ disabling only in case
   of 'mem' sleep.
 - Enable touch as a system wake-up source in case of 'standby' sleep.
zero-sugar
Michal Koziel 2021-04-12 12:12:04 +02:00 committed by mkemlogic
parent 6079b29129
commit f9a9de0748
1 changed files with 19 additions and 40 deletions
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59
drivers/input/touchscreen/pt_core.c
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@ -10391,27 +10391,24 @@ static int pt_core_suspend_(struct device *dev)
{
struct pt_core_data *cd = dev_get_drvdata(dev);
pt_core_sleep(cd);
if (pm_suspend_target_state == PM_SUSPEND_MEM) {
pt_core_sleep(cd);
pinctrl_pm_select_sleep_state(dev);
/*
* Disable interrupt here to avoid that pending IRQ makes
* the entering to low power state fail.
*/
disable_irq(cd->irq);
if (!IS_EASY_WAKE_CONFIGURED(cd->easy_wakeup_gesture))
return 0;
/* Required to prevent interrupts before bus awake */
disable_irq(cd->irq);
cd->irq_disabled = 1;
if (device_may_wakeup(dev)) {
pt_debug(dev, DL_WARN, "%s Device MAY wakeup\n",
__func__);
if (!enable_irq_wake(cd->irq))
cd->irq_wake = 1;
} else {
pt_debug(dev, DL_WARN, "%s Device MAY NOT wakeup\n",
__func__);
/*
* We need it to be a wakeup source for other suspend
* types than 'mem'.
*/
if (device_may_wakeup(dev))
enable_irq_wake(cd->irq);
}
pinctrl_pm_select_sleep_state(dev);
return 0;
}
@ -10458,33 +10455,15 @@ static int pt_core_resume_(struct device *dev)
{
struct pt_core_data *cd = dev_get_drvdata(dev);
if (!IS_EASY_WAKE_CONFIGURED(cd->easy_wakeup_gesture))
goto exit;
/*
* Bus pm does not call suspend if device runtime suspended
* This flag is covers that case
*/
if (cd->irq_disabled) {
if (pm_suspend_target_state == PM_SUSPEND_MEM) {
enable_irq(cd->irq);
cd->irq_disabled = 0;
}
if (device_may_wakeup(dev)) {
pt_debug(dev, DL_WARN, "%s Device MAY wakeup\n",
__func__);
if (cd->irq_wake) {
disable_irq_wake(cd->irq);
cd->irq_wake = 0;
}
pinctrl_pm_select_default_state(dev);
pt_core_wake(cd);
} else {
pt_debug(dev, DL_WARN, "%s Device MAY NOT wakeup\n",
__func__);
if (device_may_wakeup(dev))
disable_irq_wake(cd->irq);
}
exit:
pt_core_wake(cd);
return 0;
}