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usb: chipidea: core: add wakeup support for extcon 

commit 876d4e1e82 upstream.

If wakeup event occurred by extcon event, it needs to call
ci_irq again since the first ci_irq calling at extcon notifier
only wakes up controller, but do noop for event handling,
it causes the extcon use case can't work well from low power mode.

Cc: <stable@vger.kernel.org>
Fixes: 3ecb3e09b0 ("usb: chipidea: Use extcon framework for VBUS and ID detect")
Reported-by: Philippe Schenker <philippe.schenker@toradex.com>
Tested-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Link: https://lore.kernel.org/r/20200707060601.31907-2-peter.chen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Chen 2020-07-07 14:06:01 +08:00 committed by Greg Kroah-Hartman
parent 3dd890afed
commit 01512075a3
1 changed files with 24 additions and 0 deletions
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24
drivers/usb/chipidea/core.c
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@ -1261,6 +1261,29 @@ static void ci_controller_suspend(struct ci_hdrc *ci)
enable_irq(ci->irq);
}
/*
* Handle the wakeup interrupt triggered by extcon connector
* We need to call ci_irq again for extcon since the first
* interrupt (wakeup int) only let the controller be out of
* low power mode, but not handle any interrupts.
*/
static void ci_extcon_wakeup_int(struct ci_hdrc *ci)
{
struct ci_hdrc_cable *cable_id, *cable_vbus;
u32 otgsc = hw_read_otgsc(ci, ~0);
cable_id = &ci->platdata->id_extcon;
cable_vbus = &ci->platdata->vbus_extcon;
if (!IS_ERR(cable_id->edev) && ci->is_otg &&
(otgsc & OTGSC_IDIE) && (otgsc & OTGSC_IDIS))
ci_irq(ci->irq, ci);
if (!IS_ERR(cable_vbus->edev) && ci->is_otg &&
(otgsc & OTGSC_BSVIE) && (otgsc & OTGSC_BSVIS))
ci_irq(ci->irq, ci);
}
static int ci_controller_resume(struct device *dev)
{
struct ci_hdrc *ci = dev_get_drvdata(dev);
@ -1293,6 +1316,7 @@ static int ci_controller_resume(struct device *dev)
enable_irq(ci->irq);
if (ci_otg_is_fsm_mode(ci))
ci_otg_fsm_wakeup_by_srp(ci);
ci_extcon_wakeup_int(ci);
}
return 0;