linux-kernel - [PATCH 4/7] dt-bindings: add documentation for banks

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Message-ID: <1548937733-20189-5-git-send-email-claudiu.beznea@microchip.com>
Date:   Thu, 31 Jan 2019 12:29:36 +0000
From:   <Claudiu.Beznea@...rochip.com>
To:     <linus.walleij@...aro.org>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <Nicolas.Ferre@...rochip.com>,
        <alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com>
CC:     <linux-gpio@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <Claudiu.Beznea@...rochip.com>
Subject: [PATCH 4/7] dt-bindings: add documentation for banks

From: Claudiu Beznea <claudiu.beznea@...rochip.com>

Add documentation for at91 pin controller banks.

Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
---
 .../bindings/pinctrl/atmel,at91-pinctrl.txt        | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
index 3e23fece99da..40e33dfc36fd 100644
--- a/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
+++ b/Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt
@@ -116,6 +116,18 @@ Some requirements for using atmel,at91rm9200-pinctrl binding:
    configurations by referring to the phandle of that pin configuration node.
 4. The gpio controller must be describe in the pinctrl simple-bus.
 
+For each bank the required properties are:
+- compatible: "atmel,at91sam9x5-gpio" or "atmel,at91rm9200-gpio"
+- reg: physical base address and length of the controller's registers
+- interrupts: interrupt outputs from the controller
+- interrupt-controller: marks the device node as an interrupt controller
+- #interrupt-cells: should be 2; refer to ../interrupt-controller/interrupts.txt
+  for more details.
+- gpio-controller
+- #gpio-cells: should be 2; the first cell is the GPIO number and the second
+  cell specifies GPIO flags as defined in <dt-bindings/gpio/gpio.h>.
+- clocks: bank clock
+
 Examples:
 
 pinctrl@...ff400 {
@@ -125,6 +137,17 @@ pinctrl@...ff400 {
 	compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
 	reg = <0xfffff400 0x600>;
 
+	pioA: gpio@...ff400 {
+		compatible = "atmel,at91sam9x5-gpio";
+		reg = <0xfffff400 0x200>;
+		interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;
+		#gpio-cells = <2>;
+		gpio-controller;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;
+	};
+
 	atmel,mux-mask = <
 	      /*    A         B     */
 	       0xffffffff 0xffc00c3b  /* pioA */
-- 
2.7.4