From: Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>
commit 7656cd2177612aa7c299b083ecff30a4d3e9a587 upstream.
During standby some PSUs turn off the microcontroller. A re-init is
required during resume or the microcontroller stays unresponsive.
Fixes: d115b51e0e56 ("hwmon: add Corsair PSU HID controller driver")
Signed-off-by: Wilken Gottwalt <wilken.gottwalt@xxxxxxxxxx>
Link: https://lore.kernel.org/r/YLjCJiVtu5zgTabI@monster.powergraphx.local
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hwmon/corsair-psu.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
--- a/drivers/hwmon/corsair-psu.c
+++ b/drivers/hwmon/corsair-psu.c
@@ -570,6 +570,16 @@ static int corsairpsu_raw_event(struct h
return 0;
}
+#ifdef CONFIG_PM
+static int corsairpsu_resume(struct hid_device *hdev)
+{
+ struct corsairpsu_data *priv = hid_get_drvdata(hdev);
+
+ /* some PSUs turn off the microcontroller during standby, so a reinit is required */
+ return corsairpsu_init(priv);
+}
+#endif
+
static const struct hid_device_id corsairpsu_idtable[] = {
{ HID_USB_DEVICE(0x1b1c, 0x1c03) }, /* Corsair HX550i */
{ HID_USB_DEVICE(0x1b1c, 0x1c04) }, /* Corsair HX650i */
@@ -592,6 +602,10 @@ static struct hid_driver corsairpsu_driv
.probe = corsairpsu_probe,
.remove = corsairpsu_remove,
.raw_event = corsairpsu_raw_event,
+#ifdef CONFIG_PM
+ .resume = corsairpsu_resume,
+ .reset_resume = corsairpsu_resume,
+#endif
};
module_hid_driver(corsairpsu_driver);
