From: Nandor Han <nandor.han@ge.com>
To: gregkh@linuxfoundation.org, davem@davemloft.net,
geert@linux-m68k.org, mchehab@kernel.org, daniel.vetter@ffwll.ch,
linus.walleij@linaro.org, gnurou@gmail.com, robh+dt@kernel.org,
mark.rutland@arm.com, linux-gpio@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: Nandor Han <nandor.han@ge.com>
Subject: [PATCH v2 3/4] doc,dts - add XRA1403 DTS binding documentation
Date: Thu, 13 Apr 2017 13:27:50 +0300 [thread overview]
Message-ID: <0d970c6a929597804eae3577ed24f57ee23b820a.1492077070.git.nandor.han@ge.com> (raw)
In-Reply-To: <cover.1492077070.git.nandor.han@ge.com>
In-Reply-To: <cover.1492077070.git.nandor.han@ge.com>
Add the XRA1403 DTS binding documentation.
Signed-off-by: Nandor Han <nandor.han@ge.com>
---
.../devicetree/bindings/gpio/gpio-xra1403.txt | 46 ++++++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xra1403.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-xra1403.txt b/Documentation/devicetree/bindings/gpio/gpio-xra1403.txt
new file mode 100644
index 0000000..e13cc39
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-xra1403.txt
@@ -0,0 +1,46 @@
+GPIO Driver for XRA1403 16-BIT GPIO Expander With Reset Input from EXAR
+
+The XRA1403 is an 16-bit GPIO expander with an SPI interface. Features available:
+ - Individually programmable inputs:
+ - Internal pull-up resistors
+ - Polarity inversion
+ - Individual interrupt enable
+ - Rising edge and/or Falling edge interrupt
+ - Input filter
+ - Individually programmable outputs
+ - Output Level Control
+ - Output Three-State Control
+
+Properties
+----------
+Check documentation for SPI and GPIO controllers regarding properties needed to configure the node.
+
+ - compatible = "exar,xra1403".
+ - reg - SPI id of the device.
+ - gpio-controller - marks the node as gpio.
+ - #gpio-cells - should be two where the first cell is the pin number
+ and the second one is used for optional parameters.
+
+Optional properties:
+-------------------
+ - reset-gpios: in case available used to control the device reset line.
+ - interrupt-controller - marks the node as interrupt controller.
+ - #interrupt-cells - should be two and represents the number of cells
+ needed to encode interrupt source.
+
+Example
+--------
+
+ gpioxra0: gpio@2 {
+ compatible = "exar,xra1403";
+ reg = <2>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ interrupt-controller;
+ #interrupt-cells = <2>;
+
+ reset-gpios = <&gpio3 6 GPIO_ACTIVE_LOW>;
+ spi-max-frequency = <1000000>;
+ };
--
2.10.1
next prev parent reply other threads:[~2017-04-13 10:28 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-13 10:27 [PATCH v2 0/4] XRA1403,gpio - add XRA1403 gpio expander driver Nandor Han
2017-04-13 10:27 ` [PATCH v2 1/4] dt-bindings: gpio - add exar to vendor prefixes list Nandor Han
2017-04-19 21:48 ` Rob Herring
2017-04-24 13:19 ` Linus Walleij
2017-04-13 10:27 ` [PATCH v2 2/4] gpio - Add EXAR XRA1403 SPI GPIO expander driver Nandor Han
2017-04-13 16:22 ` kbuild test robot
2017-04-24 13:47 ` Linus Walleij
2017-04-24 13:53 ` Han, Nandor (GE Healthcare)
2017-04-25 7:07 ` Benjamin Henrion
2017-04-25 7:15 ` Geert Uytterhoeven
2017-04-26 17:50 ` Andy Shevchenko
2017-04-26 14:42 ` Linus Walleij
2017-04-13 10:27 ` Nandor Han [this message]
2017-04-19 21:55 ` [PATCH v2 3/4] doc,dts - add XRA1403 DTS binding documentation Rob Herring
2017-04-24 13:49 ` Linus Walleij
2017-04-13 10:27 ` [PATCH v2 4/4] Add XRA1403 support to MAINTAINERS file Nandor Han
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