linux-kernel - [PATCH 1/2] devicetree: gpio: 74x164: optional enable-gpios

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Date:   Mon,  7 Aug 2017 20:27:12 +0800
From:   Peng Fan <peng.fan@....com>
To:     linus.walleij@...aro.org, robh@...nel.org
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 1/2] devicetree: gpio: 74x164: optional enable-gpios

There is an OE(low active) input pin for 74hc595 and 74lv595.
To some boards, the OE pin is controlled by GPIO, so add an
optional property "enable-gpios".

Signed-off-by: Peng Fan <peng.fan@....com>
Cc: Rob Herring <robh@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>
---
 Documentation/devicetree/bindings/gpio/gpio-74x164.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-74x164.txt b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
index ce1b223..c878834 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-74x164.txt
@@ -12,6 +12,9 @@ Required properties:
       1 = active low
 - registers-number: Number of daisy-chained shift registers
 
+Optional properties:
+- enable-gpios: Specifier of the GPIO connected to OE pin
+
 Example:
 
 gpio5: gpio5@0 {
-- 
2.6.6