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Input: cros_ec_keyb - mark cros_ec_keyb driver as wake enabled device. 

Mark cros_ec_keyb has wake enabled by default. If we see a MKBP event
related to keyboard,  call pm_wakeup_event() to make sure wakeup
triggers are accounted to keyb during suspend resume path.

Signed-off-by: Ravi Chandra Sadineni <ravisadineni@chromium.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Ravi Chandra Sadineni 2018-05-30 12:22:04 -07:00 committed by Dmitry Torokhov
parent cbd606ec9f
commit 38ba34a43d
2 changed files with 28 additions and 24 deletions
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33
drivers/input/keyboard/cros_ec_keyb.c
View File

@ -244,24 +244,35 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
switch (ckdev->ec->event_data.event_type) {
case EC_MKBP_EVENT_KEY_MATRIX:
/*
* If EC is not the wake source, discard key state changes
* during suspend.
*/
if (queued_during_suspend)
return NOTIFY_OK;
if (device_may_wakeup(ckdev->dev)) {
pm_wakeup_event(ckdev->dev, 0);
} else {
/*
* If keyboard is not wake enabled, discard key state
* changes during suspend. Switches will be re-checked
* in cros_ec_keyb_resume() to be sure nothing is lost.
*/
if (queued_during_suspend)
return NOTIFY_OK;
}
if (ckdev->ec->event_size != ckdev->cols) {
dev_err(ckdev->dev,
"Discarded incomplete key matrix event.\n");
return NOTIFY_OK;
}
cros_ec_keyb_process(ckdev,
ckdev->ec->event_data.data.key_matrix,
ckdev->ec->event_size);
break;
case EC_MKBP_EVENT_SYSRQ:
if (device_may_wakeup(ckdev->dev))
pm_wakeup_event(ckdev->dev, 0);
else if (queued_during_suspend)
return NOTIFY_OK;
val = get_unaligned_le32(&ckdev->ec->event_data.data.sysrq);
dev_dbg(ckdev->dev, "sysrq code from EC: %#x\n", val);
handle_sysrq(val);
@ -269,12 +280,9 @@ static int cros_ec_keyb_work(struct notifier_block *nb,
case EC_MKBP_EVENT_BUTTON:
case EC_MKBP_EVENT_SWITCH:
/*
* If EC is not the wake source, discard key state
* changes during suspend. Switches will be re-checked in
* cros_ec_keyb_resume() to be sure nothing is lost.
*/
if (queued_during_suspend)
if (device_may_wakeup(ckdev->dev))
pm_wakeup_event(ckdev->dev, 0);
else if (queued_during_suspend)
return NOTIFY_OK;
if (ckdev->ec->event_data.event_type == EC_MKBP_EVENT_BUTTON) {
@ -639,6 +647,7 @@ static int cros_ec_keyb_probe(struct platform_device *pdev)
return err;
}
device_init_wakeup(ckdev->dev, true);
return 0;
}

19
drivers/mfd/cros_ec.c
View File

@ -229,7 +229,7 @@ int cros_ec_suspend(struct cros_ec_device *ec_dev)
}
EXPORT_SYMBOL(cros_ec_suspend);
static void cros_ec_drain_events(struct cros_ec_device *ec_dev)
static void cros_ec_report_events_during_suspend(struct cros_ec_device *ec_dev)
{
while (cros_ec_get_next_event(ec_dev, NULL) > 0)
blocking_notifier_call_chain(&ec_dev->event_notifier,
@ -253,21 +253,16 @@ int cros_ec_resume(struct cros_ec_device *ec_dev)
dev_dbg(ec_dev->dev, "Error %d sending resume event to ec",
ret);
/*
* In some cases, we need to distinguish between events that occur
* during suspend if the EC is not a wake source. For example,
* keypresses during suspend should be discarded if it does not wake
* the system.
*
* If the EC is not a wake source, drain the event queue and mark them
* as "queued during suspend".
*/
if (ec_dev->wake_enabled) {
disable_irq_wake(ec_dev->irq);
ec_dev->wake_enabled = 0;
} else {
cros_ec_drain_events(ec_dev);
}
/*
* Let the mfd devices know about events that occur during
* suspend. This way the clients know what to do with them.
*/
cros_ec_report_events_during_suspend(ec_dev);
return 0;
}