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authorKai-Heng Feng <kai.heng.feng@canonical.com>2018-11-05 16:45:03 +0800
committerUlf Hansson <ulf.hansson@linaro.org>2018-12-17 08:26:24 +0100
commit883a87ddf2f118fbce617b1b3472b8224803eb14 (patch)
tree93fe851c8278635aca78949ea32d0bc99ad88d73 /drivers/misc
parent01a7e8e066a505933b43a8df6da1ae1a1e7bddf2 (diff)
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 <kai.heng.feng@canonical.com> Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/cardreader/rtsx_usb.c8
1 files changed, 8 insertions, 0 deletions
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;
}