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Subject[PATCH v3 2/2] platform/chrome: cros_ec_typec: Add PM support
Date
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>
---

Changes in v3:
- Remove superfluous DEV_PM_OPS #define.

Changes in v2:
- Remove #ifdef-ery, add __maybe_unused tag to functions.

drivers/platform/chrome/cros_ec_typec.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_typec.c b/drivers/platform/chrome/cros_ec_typec.c
index 0beb62bf5adf..d5ac691de68b 100644
--- a/drivers/platform/chrome/cros_ec_typec.c
+++ b/drivers/platform/chrome/cros_ec_typec.c
@@ -722,11 +722,35 @@ static int cros_typec_probe(struct platform_device *pdev)
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,
};
--
2.27.0.212.ge8ba1cc988-goog
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