mfd: rtsx_usb: Add comment in rtsx_usb_suspend
Explain why there is no need to have a symmetric LED turn-on in resume handler
while calling rtsx_usb_turn_off_led() in suspend handler.
Signed-off-by: Roger Tseng <rogerable@realtek.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c
index 0ca7973..141ea52 100644
--- a/drivers/mfd/rtsx_usb.c
+++ b/drivers/mfd/rtsx_usb.c
@@ -687,9 +687,15 @@
dev_dbg(&intf->dev, "%s called with pm message 0x%04u\n",
__func__, message.event);
+ /*
+ * Call to make sure LED is off during suspend to save more power.
+ * It is NOT a permanent state and could be turned on anytime later.
+ * Thus no need to call turn_on when resunming.
+ */
mutex_lock(&ucr->dev_mutex);
rtsx_usb_turn_off_led(ucr);
mutex_unlock(&ucr->dev_mutex);
+
return 0;
}