linux-kernel - [PATCH v2 1/2] dt-bindings: Update iProc GPIO bindings

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Message-Id: <1462222308-4869-2-git-send-email-ray.jui@broadcom.com>
Date:	Mon,  2 May 2016 13:51:47 -0700
From:	Ray Jui <ray.jui@...adcom.com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Rob Herring <robh+dt@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org,
	Ray Jui <ray.jui@...adcom.com>
Subject: [PATCH v2 1/2] dt-bindings: Update iProc GPIO bindings

Update the iProc GPIO binding document to add new compatible strings
"brcm,iproc-gpio-v2" and "brcm,iproc-gpio-v3" for the 2nd and 3rd
generation of the iProc GPIO controllers

Signed-off-by: Ray Jui <ray.jui@...adcom.com>
---
 Documentation/devicetree/bindings/pinctrl/brcm,iproc-gpio.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/brcm,iproc-gpio.txt b/Documentation/devicetree/bindings/pinctrl/brcm,iproc-gpio.txt
index e427792..3a56649 100644
--- a/Documentation/devicetree/bindings/pinctrl/brcm,iproc-gpio.txt
+++ b/Documentation/devicetree/bindings/pinctrl/brcm,iproc-gpio.txt
@@ -4,7 +4,16 @@ Required properties:
 
 - compatible:
     Must be "brcm,cygnus-ccm-gpio", "brcm,cygnus-asiu-gpio",
-    "brcm,cygnus-crmu-gpio" or "brcm,iproc-gpio"
+    or "brcm,cygnus-crmu-gpio" for Cygnus SoCs
+
+    "brcm,iproc-gpio" for the first generation of the GPIO controller that
+    supports full-featured pinctrl and GPIO functions used in iProc based SoCs
+
+    "brcm,iproc-gpio-v2" for the second generation of the GPIO controller that
+    has the drive strength pinctrl support disabled, e.g., in the iProc NSP SoC
+
+    "brcm,iproc-gpio-v3" for the third generation of the GPIO controller that
+    has the general pinctrl support completely disabled
 
 - reg:
     Define the base and range of the I/O address space that contains SoC
-- 
2.1.4