From 5f0334205239bb5ae22ca89ad2af378062836498 Mon Sep 17 00:00:00 2001 From: Roger Tseng Date: Fri, 11 Apr 2014 14:53:21 +0800 Subject: [PATCH] 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 Signed-off-by: Lee Jones --- drivers/mfd/rtsx_usb.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mfd/rtsx_usb.c b/drivers/mfd/rtsx_usb.c index 0ca79736afe9..141ea52c46e3 100644 --- a/drivers/mfd/rtsx_usb.c +++ b/drivers/mfd/rtsx_usb.c @@ -687,9 +687,15 @@ static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message) 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; } -- 2.39.5