[PATCH 1/3] input: cygnus-update touchscreen dt node document

[Raveendra Padasalagi]

Touch screen driver is modified to use syscon framework
based register read/write API's. So added syscon node and
related changes in dt file.Updating the device tree documentation
file to reflect the changes.

Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@xxxxxxxxxxxx>
Reviewed-by: Ray Jui <ray.jui@xxxxxxxxxxxx>
Reviewed-by: Scott Branden <scott.branden@xxxxxxxxxxxx>
---
 .../input/touchscreen/brcm,iproc-touchscreen.txt       | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt b/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt
index 34e3382..67599ae 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/brcm,iproc-touchscreen.txt
@@ -2,8 +2,16 @@
 
 Required properties:
 - compatible: must be "brcm,iproc-touchscreen"
-- reg: physical base address of the controller and length of memory mapped
-  region.
+
+One of the below 2 property is mandatory.
+- ts_syscon: handler of syscon node defining physical base address
+  of the controller and length of memory mapped region.
+  If this property is selected please make sure MFD_SYSCON config
+  is enabled in the defconfig file.
+or
+- reg: physical base address of the controller and length of memory
+  mapped region.
+
 - clocks:  The clock provided by the SOC to driver the tsc
 - clock-name:  name for the clock
 - interrupts: The touchscreen controller's interrupt
@@ -54,12 +62,16 @@ Optional properties:
 - touchscreen-inverted-y: Y axis is inverted (boolean)
 
 Example:
+	ts_adc_syscon: ts_adc_syscon@0x180a6000 {
+		compatible = "syscon";
+		reg = <0x180a6000 0xc30>;
+	};
 
 	touchscreen: tsc@0x180A6000 {
 		compatible = "brcm,iproc-touchscreen";
 		#address-cells = <1>;
 		#size-cells = <1>;
-		reg = <0x180A6000 0x40>;
+		syscon = <&ts_adc_syscon>;
 		clocks = <&adc_clk>;
 		clock-names = "tsc_clk";
 		interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
-- 
1.9.1