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[RFC,3/5] usb: xhci-plat: enable async suspend/resume

Message ID 1387363174-25942-3-git-send-email-yuvaraj.cd@samsung.com
State New, archived
Headers show

Commit Message

Yuvaraj CD Dec. 18, 2013, 10:39 a.m. UTC
From: Andrew Bresticker <abrestic@chromium.org>

USB host controllers can take a significant amount of time to suspend
and resume, adding several hundred miliseconds to the kernel resume
time. Since the XHCI controller has no outside dependencies (other than
clocks, which are suspended late/resumed early), allow it to suspend and
resume asynchronously.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com>
---
 drivers/usb/host/xhci-plat.c |    2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 8abda5c..1bc1565 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -162,6 +162,8 @@  static int xhci_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto put_usb3_hcd;
 
+	device_enable_async_suspend(&pdev->dev);
+
 	return 0;
 
 put_usb3_hcd: