linux-kernel - [PATCH v3 1/5] dt-bindings: gpio: aspeed: Update documentation with ast2600 controllers

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Message-Id: <20190906062547.13264-1-rashmica.g@gmail.com>
Date:   Fri,  6 Sep 2019 16:25:47 +1000
From:   Rashmica Gupta <rashmica.g@...il.com>
To:     linus.walleij@...aro.org
Cc:     Rashmica Gupta <rashmica.g@...il.com>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>,
        linux-gpio@...r.kernel.org (open list:GPIO SUBSYSTEM),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS),
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/ASPEED MACHINE
        SUPPORT),
        linux-aspeed@...ts.ozlabs.org (moderated list:ARM/ASPEED MACHINE
        SUPPORT), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3 1/5] dt-bindings: gpio: aspeed: Update documentation with ast2600 controllers

The ast2600 is a new generation of SoC from ASPEED. Similarly to the
ast2400 and ast2500, it has a GPIO controller for it's 3.3V GPIO pins.
Additionally, it has a GPIO controller for 36 1.8V GPIO pins.  We use
the ngpio property to differentiate between these controllers.

Signed-off-by: Rashmica Gupta <rashmica.g@...il.com>
---
 Documentation/devicetree/bindings/gpio/gpio-aspeed.txt | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt b/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt
index 7e9b586770b0..b2033fc3a71a 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-aspeed.txt
@@ -2,7 +2,8 @@ Aspeed GPIO controller Device Tree Bindings
 -------------------------------------------
 
 Required properties:
-- compatible		: Either "aspeed,ast2400-gpio" or "aspeed,ast2500-gpio"
+- compatible		: Either "aspeed,ast2400-gpio", "aspeed,ast2500-gpio",
+					or "aspeed,ast2600-gpio".
 
 - #gpio-cells 		: Should be two
 			  - First cell is the GPIO line number
@@ -17,7 +18,9 @@ Required properties:
 
 Optional properties:
 
-- clocks                : A phandle to the clock to use for debounce timings
+- clocks		: A phandle to the clock to use for debounce timings
+- ngpios		: Number of GPIOs controlled by this controller. Should	be set
+				  when there are multiple GPIO controllers on a SoC (ast2600).
 
 The gpio and interrupt properties are further described in their respective
 bindings documentation:
-- 
2.20.1