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usb: typec: tcpci: add wakeup support

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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: Frank Li <Frank.Li@nxp.com>
Reviewed-by: Badhri Jagan Sridharan <badhri@google.com>
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Link: https://lore.kernel.org/r/20250910105042.695146-1-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xu Yang
2025-09-10 18:50:42 +08:00
committed by Greg Kroah-Hartman
parent 6f9871b3e8
commit a5d2edb2c9
1 changed files with 33 additions and 0 deletions
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33
drivers/usb/typec/tcpm/tcpci.c
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@@ -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,