linux-kernel - [PATCH AUTOSEL for 4.9 15/33] dt-bindings: usb: fix reg-property port-number range

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Message-ID: <20171202155204.7691-15-alexander.levin@verizon.com>
Date:   Sat, 2 Dec 2017 15:52:20 +0000
From:   alexander.levin@...izon.com
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Johan Hovold <johan@...nel.org>, Rob Herring <robh@...nel.org>,
        alexander.levin@...izon.com
Subject: [PATCH AUTOSEL for 4.9 15/33] dt-bindings: usb: fix reg-property
 port-number range

From: Johan Hovold <johan@...nel.org>

[ Upstream commit f42ae7b0540937e00fe005812997f126aaac4bc2 ]

The USB hub port-number range for USB 2.0 is 1-255 and not 1-31 which
reflects an arbitrary limit set by the current Linux implementation.

Note that for USB 3.1 hubs the valid range is 1-15.

Increase the documented valid range in the binding to 255, which is the
maximum allowed by the specifications.

Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Rob Herring <robh@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 Documentation/devicetree/bindings/usb/usb-device.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/usb/usb-device.txt b/Documentation/devicetree/bindings/usb/usb-device.txt
index 1c35e7b665e1..03ab8f5eab40 100644
--- a/Documentation/devicetree/bindings/usb/usb-device.txt
+++ b/Documentation/devicetree/bindings/usb/usb-device.txt
@@ -11,7 +11,7 @@ Required properties:
   be used, but a device adhering to this binding may leave out all except
   for usbVID,PID.
 - reg: the port number which this device is connecting to, the range
-  is 1-31.
+  is 1-255.
 
 Example:
 
-- 
2.11.0