Commit a5d2edb2 authored by Xu Yang's avatar Xu Yang Committed by Greg Kroah-Hartman
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usb: typec: tcpci: add wakeup support 



Add wakeup support for tcpci. If the user enables the wakeup file, call
enable_irq_wake() during system suspend and disable_irq_wake() during
system resume. Since this driver supports shared interrupts, mask the
chip interrupt by default when wakeup is disabled to avoid affecting
other IRQ users.

Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Reviewed-by: default avatarBadhri Jagan Sridharan <badhri@google.com>
Signed-off-by: default avatarXu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20250910105042.695146-1-xu.yang_2@nxp.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6f9871b3

drivers/usb/typec/tcpm/tcpci.c

+33 −0
Original line number Diff line number Diff line
@@ -949,6 +949,8 @@ static int tcpci_probe(struct i2c_client *client) 
	if (err < 0)

		goto unregister_port;



	device_set_wakeup_capable(chip->tcpci->dev, true);



	return 0;



unregister_port:
@@ -969,6 +971,36 @@ static void tcpci_remove(struct i2c_client *client) 
	tcpci_unregister_port(chip->tcpci);

}



static int tcpci_suspend(struct device *dev)

{

	struct i2c_client *i2c = to_i2c_client(dev);

	struct tcpci_chip *chip = i2c_get_clientdata(i2c);

	int ret;



	if (device_may_wakeup(dev))

		ret = enable_irq_wake(i2c->irq);

	else

		ret = tcpci_write16(chip->tcpci, TCPC_ALERT_MASK, 0);



	return ret;

}



static int tcpci_resume(struct device *dev)

{

	struct i2c_client *i2c = to_i2c_client(dev);

	struct tcpci_chip *chip = i2c_get_clientdata(i2c);

	int ret;



	if (device_may_wakeup(dev))

		ret = disable_irq_wake(i2c->irq);

	else

		ret = tcpci_write16(chip->tcpci, TCPC_ALERT_MASK, chip->tcpci->alert_mask);



	return ret;

}



DEFINE_SIMPLE_DEV_PM_OPS(tcpci_pm_ops, tcpci_suspend, tcpci_resume);



static const struct i2c_device_id tcpci_id[] = {

	{ "tcpci" },

	{ }
@@ -987,6 +1019,7 @@ MODULE_DEVICE_TABLE(of, tcpci_of_match); 
static struct i2c_driver tcpci_i2c_driver = {

	.driver = {

		.name = "tcpci",

		.pm = pm_sleep_ptr(&tcpci_pm_ops),

		.of_match_table = of_match_ptr(tcpci_of_match),

	},

	.probe = tcpci_probe,