[PATCH v2 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-***@ti.com>
---
.../devicetree/bindings/gpio/gpio-davinci.txt | 39 +++++++++++++++++++++-
1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
index 5079ba7..9f4f612 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio-davinci.txt
@@ -1,7 +1,9 @@
Davinci/Keystone GPIO controller bindings

Required Properties:
-- compatible: should be "ti,dm6441-gpio", "ti,keystone-gpio"
+- compatible: should be "ti,dm6441-gpio",
+ "ti,keystone-gpio",
+ "ti,keystone-k2g-gpio"

- reg: Physical base address of the controller and the size of memory mapped
registers.
@@ -26,6 +28,17 @@ 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: ***@1e26000 {
@@ -60,3 +73,27 @@ leds {
...
};
};
+
+Example for keystone-k2g:
+
+gpio0: ***@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";
+};

[Keerthy]

66AK2G has 2 instances of gpio. The first one has all the 144 GPIOs
functional( 9 banks with 16 gpios = 144). The second instance has
only the GPIO0:GPIO67 functional and rest are marked reserved.

Signed-off-by: Keerthy <j-***@ti.com>
---

The patch depends on the below series:

http://marc.info/?l=linux-arm-kernel&m=150034845427555&w=2
http://marc.info/?l=linux-arm-kernel&m=150034856627618&w=2

Driver patches related are already posted:

https://www.spinics.net/lists/arm-kernel/msg594862.html

Changes in v2:

* Split the documentation part into a separate patch.

arch/arm/boot/dts/keystone-k2g.dtsi | 42 +++++++++++++++++++++++++++++++++++++
1 file changed, 42 insertions(+)

diff --git a/arch/arm/boot/dts/keystone-k2g.dtsi b/arch/arm/boot/dts/keystone-k2g.dtsi
index bf4d1fa..f9ff299 100644
--- a/arch/arm/boot/dts/keystone-k2g.dtsi
+++ b/arch/arm/boot/dts/keystone-k2g.dtsi
@@ -15,6 +15,7 @@

#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/pinctrl/keystone.h>
+#include <dt-bindings/gpio/gpio.h>

/ {
compatible = "ti,k2g","ti,keystone";
@@ -168,5 +169,46 @@
#reset-cells = <2>;
};
};
+
+ gpio0: ***@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";
+ };
+
+ gpio1: ***@260a000 {
+ compatible = "ti,keystone-k2g-gpio", "ti,keystone-gpio";
+ reg = <0x0260a000 0x100>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ interrupts = <GIC_SPI 442 IRQ_TYPE_EDGE_RISING>,
+ <GIC_SPI 443 IRQ_TYPE_EDGE_RISING>,
+ <GIC_SPI 444 IRQ_TYPE_EDGE_RISING>,
+ <GIC_SPI 445 IRQ_TYPE_EDGE_RISING>,
+ <GIC_SPI 446 IRQ_TYPE_EDGE_RISING>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ ti,ngpio = <68>;
+ ti,davinci-gpio-unbanked = <0>;
+ clocks = <&k2g_clks 0x001c 0x0>;
+ clock-names = "gpio";
+ };
};
};