From: William Wu <wulf@rock-chips.com>
Date: Tue, 21 Feb 2017 09:37:58 +0000 (+0800)
Subject: usb: host: xhci-plat: get the usb3 phy for shared_hcd
X-Git-Tag: firefly_0821_release~578
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d4179fa84050324620c201e217a7f86e08ef577d;p=firefly-linux-kernel-4.4.55.git

usb: host: xhci-plat: get the usb3 phy for shared_hcd

This patch tries to get the USB3 PHY using, and associates
the XHCI shared_hcd device with it.

With this patch, the USB HUB core driver can do USB PHY
operations base on USB PHY framework, e.g. call usb_phy_
notify_connect() or usb_phy_notify_disconnect() to notify
USB PHY driver to do soft connect or soft disconnect.

Change-Id: I3b51181b840a68ae477b764013446f49dbf7ca70
Signed-off-by: William Wu <wulf@rock-chips.com>
---

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index fe7de8a58ef5..0f50c1cdea5a 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -175,6 +175,15 @@ static int xhci_plat_probe(struct platform_device *pdev)
 	if (pdata && pdata->usb3_disable_autosuspend)
 		xhci->quirks |= XHCI_DIS_AUTOSUSPEND;
 
+	xhci->shared_hcd->usb_phy = devm_usb_get_phy(&pdev->dev,
+						     USB_PHY_TYPE_USB3);
+	if (IS_ERR(xhci->shared_hcd->usb_phy)) {
+		ret = PTR_ERR(xhci->shared_hcd->usb_phy);
+		if (ret == -EPROBE_DEFER)
+			goto put_usb3_hcd;
+		xhci->shared_hcd->usb_phy = NULL;
+	}
+
 	hcd->usb_phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
 	if (IS_ERR(hcd->usb_phy)) {
 		ret = PTR_ERR(hcd->usb_phy);