linux-kernel - [PATCH v4 4/8] MFD: ti_am335x_tscadc: add device tree binding information

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Date:	Thu, 24 Jan 2013 09:15:08 +0530
From:	"Patil, Rachna" <rachna@...com>
To:	<linux-doc@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
	<linux-kernel@...r.kernel.org>, <linux-input@...r.kernel.org>,
	<linux-iio@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
CC:	Samuel Ortiz <sameo@...ux.intel.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Dmitry Torokhov <dtor@...l.ru>,
	Rob Herring <rob.herring@...xeda.com>,
	Jonathan Cameron <jic23@....ac.uk>,
	Tony Lindgren <tony@...mide.com>,
	Benit Cousson <b-cousson@...com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Landley <rob@...dley.net>,
	Russell King <linux@....linux.org.uk>,
	<gururaja.hebbar@...com>, "Patil, Rachna" <rachna@...com>
Subject: [PATCH v4 4/8] MFD: ti_am335x_tscadc: add device tree binding information

From: "Patil, Rachna" <rachna@...com>

Signed-off-by: Patil, Rachna <rachna@...com>
---
Changes in v4:
	Subnodes and their properties documentation added.
	Non-standard properties prefixed with vendor name.

 .../devicetree/bindings/mfd/ti_am335x_tscadc.txt   |   52 ++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt

diff --git a/Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt b/Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt
new file mode 100644
index 0000000..0100771
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti_am335x_tscadc.txt
@@ -0,0 +1,52 @@
+Texas Instruments - TSC / ADC multi-functional device
+
+ti_tscadc is a multi-function device with touchscreen and ADC on chip.
+This document describes the binding for mfd device.
+
+Required properties:
+- compatible: "ti,ti-tscadc"
+- reg: Specifies the address of MFD block
+- interrupts: IRQ line connected to the main SoC
+- interrupt-parent: The parent interrupt controller
+
+Optional properties:
+- ti,hwmods: Hardware information related to TSC/ADC MFD device
+
+Sub-nodes:
+Device			Description
+------			-----------
+tsc			Touchscreen
+adc			Analog to digital converter
+
+Sub-node device required properties:
+tsc:
+- ti,wires:  4/5/8 wire touchscreen support on the platform.
+- ti,x-plate-resistance: X plate resistance.
+- ti,steps-to-configure: A step is configured to read a single co-ordinate value,
+			can be applied more number of times for better results.
+- ti,wire-config: Order for connecting wires on touchscreen.
+
+adc:
+- ti,adc-channels: Number of ADC channels used.
+
+Example:
+
+	tscadc: tscadc@...0d000 {
+		compatible = "ti,ti-tscadc";
+		reg = <0x44e0d000 0x1000>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <16>;
+		ti,hwmods = "adc_tsc";
+
+		tsc {
+			ti,wires = <4>;
+			ti,x-plate-resistance = <200>;
+			ti,steps-to-configure = <5>;
+			ti,wire-config = <0x00 0x11 0x22 0x33>;
+		};
+
+		adc {
+			ti,adc-channels = <4>;
+		};
+	};
-- 
1.7.9.5

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