[PATCH 1/2] ARM: davinci: da850: add pinctrl driver entries

[Kumar, Anil]

For DT, DaVinci platform can use pinctrl-single driver for handling
padconf registers.

Enable PINCTRL Kconfig for all DaVinci platform. Add required
pinctrl DT entries in da850 dts file.

Test procedure
 1)Populate DT file with NAND node information.
 2)Populate board DT file with pinmux information for NAND.
 3)Boot and confirm NAND is detected by the kernel.
 4)cat /proc/mtd to show partitions.

Signed-off-by: Kumar, Anil <anilkumar.v at ti.com>
---
:000000 100644 0000000... f999d9e... A	Documentation/devicetree/bindings/arm/davinci/pinctrl.txt
:100644 100644 06e0adf... 54a5405... M	arch/arm/Kconfig
:100644 100644 37dc5a3... 8cac9d2... M	arch/arm/boot/dts/da850-evm.dts
:100644 100644 fbada87... 94471bc... M	arch/arm/boot/dts/da850.dtsi
:100644 100644 f292239... 0892db4... M	arch/arm/configs/da8xx_omapl_defconfig
 .../devicetree/bindings/arm/davinci/pinctrl.txt    |   29 ++++++++++++++++++++
 arch/arm/Kconfig                                   |    1 +
 arch/arm/boot/dts/da850-evm.dts                    |    3 ++
 arch/arm/boot/dts/da850.dtsi                       |   10 +++++++
 arch/arm/configs/da8xx_omapl_defconfig             |    1 +
 5 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/davinci/pinctrl.txt b/Documentation/devicetree/bindings/arm/davinci/pinctrl.txt
new file mode 100644
index 0000000..f999d9e
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/davinci/pinctrl.txt
@@ -0,0 +1,29 @@
+* Texas Instruments Davinci pinctrl-single
+
+This file provides information, what the device node for the
+davinci pinctrl-single interface contain.
+
+Required properties:
+- compatible: "pinctrl-single";
+
+- reg : offset and length of the register set for the mux registers
+
+- pinctrl-single,bit-per-mux: mask of allowed pinmux function bits in the
+  pinmux register
+
+- pinctrl-single,register-width: pinmux register access width in bits
+
+- pinctrl-single,function-mask:  mask of allowed pinmux function bits in
+  the pinmux register
+
+Example:
+pmx_core:pinmux at 14120 {
+		compatible = "pinctrl-single";
+		reg = <0x14120 0x50>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		pinctrl-single,bit-per-mux;
+		pinctrl-single,register-width = <32>;
+		pinctrl-single,function-mask = <0xffffffff>;
+};
+~
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 06e0adf..54a5405 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -924,6 +924,7 @@ config ARCH_DAVINCI
 	select GENERIC_IRQ_CHIP
 	select HAVE_IDE
 	select NEED_MACH_GPIO_H
+	select PINCTRL
 	select USE_OF
 	select ZONE_DMA
 	help
diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index 37dc5a3..8cac9d2 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -15,6 +15,9 @@
 	model = "DA850/AM1808/OMAP-L138 EVM";
 
 	soc {
+		pmx_core:pinmux at 14120 {
+			status = "okay";
+		};
 		serial0: serial at 1c42000 {
 			status = "okay";
 		};
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index fbada87..94471bc 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -29,6 +29,16 @@
 		#size-cells = <1>;
 		ranges = <0x0 0x01c00000 0x400000>;
 
+		pmx_core:pinmux at 14120 {
+			compatible = "pinctrl-single";
+			reg = <0x14120 0x50>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			pinctrl-single,bit-per-mux;
+			pinctrl-single,register-width = <32>;
+			pinctrl-single,function-mask = <0xffffffff>;
+			status = "disabled";
+		};
 		serial0: serial at 1c42000 {
 			compatible = "ns16550a";
 			reg = <0x42000 0x100>;
diff --git a/arch/arm/configs/da8xx_omapl_defconfig b/arch/arm/configs/da8xx_omapl_defconfig
index f292239..0892db4 100644
--- a/arch/arm/configs/da8xx_omapl_defconfig
+++ b/arch/arm/configs/da8xx_omapl_defconfig
@@ -81,6 +81,7 @@ CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_DAVINCI=y
+CONFIG_PINCTRL_SINGLE=y
 # CONFIG_HWMON is not set
 CONFIG_WATCHDOG=y
 CONFIG_REGULATOR=y
-- 
1.7.4.1