linux-kernel - [PATCH v2 2/5] Documentation: Detail permitted DT properties for the imx6ul

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Message-ID: <1438077521-12857-3-git-send-email-haibo.chen@freescale.com>
Date:	Tue, 28 Jul 2015 17:58:38 +0800
From:	Haibo Chen <haibo.chen@...escale.com>
To:	<robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>,
	<ijc+devicetree@...lion.org.uk>, <galak@...eaurora.org>,
	<shawnguo@...nel.org>, <kernel@...gutronix.de>,
	<linux@....linux.org.uk>, <dmitry.torokhov@...il.com>
CC:	<haibo.chen@...escale.com>, <hans.verkuil@...co.com>,
	<hadess@...ess.net>, <mchehab@....samsung.com>,
	<mamlinav@...il.com>, <arnd@...db.de>, <jonathar@...adcom.com>,
	<hdegoede@...hat.com>, <christian.gmeiner@...il.com>,
	<scott.liu@....com.tw>, <geert@...ux-m68k.org>,
	<benjamin.tissoires@...hat.com>,
	<sebastien.szymanski@...adeus.com>, <sbranden@...adcom.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-input@...r.kernel.org>
Subject: [PATCH v2 2/5] Documentation: Detail permitted DT properties for the imx6ul_tsc

Here we apply required documentation for the imx6ul touch screen
controller driver which describe available properties and how to
use them.

Signed-off-by: Haibo Chen <haibo.chen@...escale.com>
---
 .../bindings/input/touchscreen/imx6ul_tsc.txt      | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt

diff --git a/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt b/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt
new file mode 100644
index 0000000..ac41c32
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/imx6ul_tsc.txt
@@ -0,0 +1,36 @@
+* Freescale i.MX6UL Touch Controller
+
+Required properties:
+- compatible: must be "fsl,imx6ul-tsc".
+- reg: this touch controller address and the ADC2 address.
+- interrupts: the interrupt of this touch controller and ADC2.
+- clocks: the root clock of touch controller and ADC2.
+- clock-names; must be "tsc" and "adc".
+- xnur-gpio: the X- gpio this controller connect to.
+  This xnur-gpio returns to high once the finger leave the touch screen (The
+  last touch event the touch controller capture).
+
+Optional properties:
+- measure-delay-time: the value of measure delay time.
+  Before X-axis or Y-axis measurement, the screen need some time before
+  even potential distribution ready.
+  This value depends on the touch screen.
+- pre-charge-time: the touch screen need some time to precharge.
+  This value depends on the touch screen.
+
+Example:
+	tsc: tsc@...40000 {
+		compatible = "fsl,imx6ul-tsc";
+		reg = <0x02040000 0x4000>, <0x0219c000 0x4000>;
+		interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&clks IMX6UL_CLK_IPG>,
+			 <&clks IMX6UL_CLK_ADC2>;
+		clock-names = "tsc", "adc";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_tsc>;
+		xnur-gpio = <&gpio1 3 GPIO_ACTIVE_HIGH>;
+		measure-delay-time = <0xfff>;
+		pre-charge-time = <0xffff>;
+		status = "okay";
+	};
-- 
1.9.1

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