[PATCH v3 1/2] gpio: davinci: Add keystone-k2g compatible

[Keerthy]

The patch adds keystone-k2g compatible, specific properties and
an example.

Signed-off-by: Keerthy <j-keerthy at ti.com>
---

Changes in v3:

  * Added details about family of SoCs corresponding to compatibles.

 .../devicetree/bindings/gpio/gpio-davinci.txt      | 40 +++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
index 5079ba7..fb9efee 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
@@ -1,7 +1,10 @@
 Davinci/Keystone GPIO controller bindings
 
 Required Properties:
-- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
+- compatible: should be "ti,dm6441-gpio": for Davinci da850 SoCs 
+			"ti,keystone-gpio": for Keystone 2 66AK2H/K, 66AK2L,
+						66AK2E SoCs
+			"ti,keystone-k2g-gpio", "ti,keystone-gpio": for 66AK2G
 
 - reg: Physical base address of the controller and the size of memory mapped
        registers.
@@ -26,6 +29,17 @@ The GPIO controller also acts as an interrupt controller. It uses the default
 two cells specifier as described in Documentation/devicetree/bindings/
 interrupt-controller/interrupts.txt.
 
+Required Properties specific to keystone-k2g
+
+- clocks: Should contain devices input clock. The first parameter
+           is a handle to k2g_clks. The second parameter is the
+           device ID and the third parameter is the clock ID. One can
+           refer: http://processors.wiki.ti.com/index.php/TISCI#66AK2G02_Data
+
+           Example: <&k2g_clks 0x001c 0x0>;
+
+- clock-names: The driver expects the clock name to be "gpio";
+
 Example:
 
 gpio: gpio at 1e26000 {
@@ -60,3 +74,27 @@ leds {
 		...
 	};
 };
+
+Example for keystone-k2g:
+
+gpio0: gpio at 2603000 {
+	compatible = "ti,keystone-k2g-gpio", "ti,keystone-gpio";
+	reg = <0x02603000 0x100>;
+	gpio-controller;
+	#gpio-cells = <2>;
+	interrupts = <GIC_SPI 432 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 433 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 434 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 435 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 436 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 437 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 438 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 439 IRQ_TYPE_EDGE_RISING>,
+			<GIC_SPI 440 IRQ_TYPE_EDGE_RISING>;
+	interrupt-controller;
+	#interrupt-cells = <2>;
+	ti,ngpio = <144>;
+	ti,davinci-gpio-unbanked = <0>;
+	clocks = <&k2g_clks 0x001b 0x0>;
+	clock-names = "gpio";
+};
-- 
1.9.1