linux-kernel - [PATCH v2 06/10] usb: xhci: Enable runtime pm in xhci-plat

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Date:	Sat, 02 Mar 2013 18:53:07 +0530
From:	Vivek Gautam <gautam.vivek@...sung.com>
To:	linux-usb@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-samsung-soc@...r.kernel.org, gregkh@...uxfoundation.org,
	balbi@...com, sarah.a.sharp@...ux.intel.com, kgene.kim@...sung.com,
	kishon@...com, Doug Anderson <dianders@...omium.org>
Subject: [PATCH v2 06/10] usb: xhci: Enable runtime pm in xhci-plat

By enabling runtime pm in this driver allows users of
xhci-plat to enter into runtime pm. This is not full
runtime pm support (AKA xhci-plat doesn't actually power
anything off when in runtime suspend mode) but,
just basic enablement.

Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
CC: Doug Anderson <dianders@...omium.org>
---
 drivers/usb/host/xhci-plat.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c9c7e13..595cb52 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/module.h>
 #include <linux/slab.h>
 
@@ -149,6 +150,8 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto put_usb3_hcd;
 
+	pm_runtime_enable(&pdev->dev);
+
 	return 0;
 
 put_usb3_hcd:
@@ -174,6 +177,10 @@ static int xhci_plat_remove(struct platform_device *dev)
 	struct usb_hcd	*hcd = platform_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
 
+	if (!pm_runtime_suspended(&dev->dev))
+		pm_runtime_put(&dev->dev);
+	pm_runtime_disable(&dev->dev);
+
 	usb_remove_hcd(xhci->shared_hcd);
 	usb_put_hcd(xhci->shared_hcd);
 
-- 
1.7.6.5

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