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misc: rtsx_usb: Use USB remote wakeup signaling for card insertion detection

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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>
This commit is contained in:
Kai-Heng Feng 2018-11-05 16:45:03 +08:00 committed by Ulf Hansson
parent 01a7e8e066
commit 883a87ddf2
1 changed files with 8 additions and 0 deletions
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8
drivers/misc/cardreader/rtsx_usb.c
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@ -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;
}