From: Frank Wang <frank.wang@rock-chips.com>
Date: Tue, 11 Oct 2016 07:27:44 +0000 (+0800)
Subject: usb: ehci-platform: support no relinquishing port quirk
X-Git-Tag: firefly_0821_release~1432
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0fd1853df055;p=firefly-linux-kernel-4.4.55.git

usb: ehci-platform: support no relinquishing port quirk

Add a quirk to cancel relinquishing port from ehci to
abnormal ohci when HS device is not ready connected.

To support this function, the no-relinquish-port property
must be specified in ehci node of dt.

Change-Id: Ief0b24cf9e58dde28f386ea67fe8936e8fd74f2d
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
---

diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
index bd7082f297bb..5756dc8e8e00 100644
--- a/drivers/usb/host/ehci-platform.c
+++ b/drivers/usb/host/ehci-platform.c
@@ -202,6 +202,10 @@ static int ehci_platform_probe(struct platform_device *dev)
 					  "has-transaction-translator"))
 			hcd->has_tt = 1;
 
+		if (of_property_read_bool(dev->dev.of_node,
+					  "no-relinquish-port"))
+			ehci_platform_hc_driver.relinquish_port = NULL;
+
 		priv->num_phys = of_count_phandle_with_args(dev->dev.of_node,
 				"phys", "#phy-cells");