platform/chrome: cros_ec_typec: Add PM support

Define basic suspend resume functions for cros-ec-typec. On suspend, we
simply ensure that any pending port update work is completed, and on
resume, we re-poll the port state to account for any
changes/disconnections that might have occurred during suspend.

Signed-off-by: Prashant Malani <pmalani@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 9901bf2..3eae01f 100644 (file)
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -720,11 +720,35 @@ unregister_ports:
        return ret;
 }
 
+static int __maybe_unused cros_typec_suspend(struct device *dev)
+{
+       struct cros_typec_data *typec = dev_get_drvdata(dev);
+
+       cancel_work_sync(&typec->port_work);
+
+       return 0;
+}
+
+static int __maybe_unused cros_typec_resume(struct device *dev)
+{
+       struct cros_typec_data *typec = dev_get_drvdata(dev);
+
+       /* Refresh port state. */
+       schedule_work(&typec->port_work);
+
+       return 0;
+}
+
+static const struct dev_pm_ops cros_typec_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(cros_typec_suspend, cros_typec_resume)
+};
+
 static struct platform_driver cros_typec_driver = {
        .driver = {
                .name = DRV_NAME,
                .acpi_match_table = ACPI_PTR(cros_typec_acpi_id),
                .of_match_table = of_match_ptr(cros_typec_of_match),
+               .pm = &cros_typec_pm_ops,
        },
        .probe = cros_typec_probe,
 };