From 883a87ddf2f118fbce617b1b3472b8224803eb14 Mon Sep 17 00:00:00 2001 From: Kai-Heng Feng Date: Mon, 5 Nov 2018 16:45:03 +0800 Subject: [PATCH] misc: rtsx_usb: Use USB remote wakeup signaling for card insertion detection Although rtsx_usb doesn't support card removal detection, card insertion will resume rtsx_usb by USB remote wakeup signaling. When rtsx_usb gets resumed, also resumes its child devices, rtsx_usb_sdmmc and rtsx_usb_ms, to notify them there's a card in its slot. Signed-off-by: Kai-Heng Feng Tested-by: Oleksandr Natalenko Signed-off-by: Ulf Hansson --- drivers/misc/cardreader/rtsx_usb.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/misc/cardreader/rtsx_usb.c b/drivers/misc/cardreader/rtsx_usb.c index b97903ff1a72..f7a66f614085 100644 --- a/drivers/misc/cardreader/rtsx_usb.c +++ b/drivers/misc/cardreader/rtsx_usb.c @@ -723,8 +723,15 @@ static int rtsx_usb_suspend(struct usb_interface *intf, pm_message_t message) return 0; } +static int rtsx_usb_resume_child(struct device *dev, void *data) +{ + pm_request_resume(dev); + return 0; +} + static int rtsx_usb_resume(struct usb_interface *intf) { + device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child); return 0; } @@ -734,6 +741,7 @@ static int rtsx_usb_reset_resume(struct usb_interface *intf) (struct rtsx_ucr *)usb_get_intfdata(intf); rtsx_usb_reset_chip(ucr); + device_for_each_child(&intf->dev, NULL, rtsx_usb_resume_child); return 0; } -- 2.30.2