linux-kernel - [PATCH v2 1/2] dt-bindings: gpio: add SAMA5D2 PIOBU support

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Message-ID: <1542701330-23466-2-git-send-email-andrei.stefanescu@microchip.com>
Date:   Tue, 20 Nov 2018 08:08:36 +0000
From:   <Andrei.Stefanescu@...rochip.com>
To:     <linus.walleij@...aro.org>, <gregkh@...uxfoundation.org>,
        <Nicolas.Ferre@...rochip.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>
CC:     <Ludovic.Desroches@...rochip.com>, <Cristian.Birsan@...rochip.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <Andrei.Stefanescu@...rochip.com>
Subject: [PATCH v2 1/2] dt-bindings: gpio: add SAMA5D2 PIOBU support

This patch describes the compatible and the device tree
bindings necessary for the SAMA5D2 PIOBU GPIO.

Signed-off-by: Andrei Stefanescu <andrei.stefanescu@...rochip.com>
---
 .../bindings/gpio/gpio-sama5d2-piobu.txt           | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt b/Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt
new file mode 100644
index 0000000..2e260e1
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-sama5d2-piobu.txt
@@ -0,0 +1,31 @@
+GPIO controller for SAMA5D2 PIOBU pins.
+
+These pins have the property of not losing their voltage
+during Backup/Self-refresh mode.
+
+These bindings should be set to a node in the dtsi file.
+
+Required properties:
+- compatible:		"syscon", "microchip,sama5d2-piobu"
+- #gpio-cells:		There are 2. The pin number is the
+			first, the second represents additional
+			parameters such as GPIO_ACTIVE_HIGH/LOW.
+- gpio-controller:	Marks the port as GPIO controller.
+
+Note that the driver uses syscon and should be the child of
+the syscon node.
+
+Example:
+
+	secumod@...40000 {
+		compatible = "atmel,sama5d2-secumod", "syscon", "simple-mfd";
+		status = "okay";
+		reg = <0xfc040000 0x100>;
+
+		pioBU: piobu {
+			status = "okay";
+			compatible = "microchip,sama5d2-piobu";
+			gpio-controller;
+			#gpio-cells = <2>;
+		};
+	};
-- 
2.7.4