ARM: davinci: da850: add DT node for I2C0

Add I2C0 device tree and pin muxing information to da850-evm.
Also, add OF_DEV_AUXDATA for I2C0 controller driver in da850
board dt file to use I2C0 clock.
Verified i2c0 node gets created in sys class interface as
"/sys/class/i2c-dev/i2c-0/subsystem/i2c-0".

nsekhar@ti.com: tested using i2cdetect and i2cdump.

Signed-off-by: Vishwanathrao Badarkhe, Manish <manishv.b@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

3 files changed, 27 insertions, 1 deletions

diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts
index fa04152b24bf..0060903b2b78 100644
--- a/arch/arm/boot/dts/da850-evm.dts
+++ b/arch/arm/boot/dts/da850-evm.dts
@@ -30,6 +30,12 @@
                 rtc0: rtc@1c23000 {
                         status = "okay";
                 };
+                i2c0: i2c@1c22000 {
+                        status = "okay";
+                        clock-frequency = <100000>;
+                        pinctrl-names = "default";
+                        pinctrl-0 = <&i2c0_pins>;
+                };
         };
         nand_cs3@62000000 {
                 status = "okay";
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 8dd15c0426a8..9669e80cbada 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -56,6 +56,12 @@
                                         0x30 0x01100000  0x0ff00000
                                 >;
                         };
+                        i2c0_pins: pinmux_i2c0_pins {
+                                pinctrl-single,bits = <
+                                        /* I2C0_SDA,I2C0_SCL */
+                                        0x10 0x00002200 0x0000ff00
+                                >;
+                        };
                 };
                 serial0: serial@1c42000 {
                         compatible = "ns16550a";
@@ -88,6 +94,14 @@
                                       19>;
                         status = "disabled";
                 };
+                i2c0: i2c@1c22000 {
+                        compatible = "ti,davinci-i2c";
+                        reg = <0x22000 0x1000>;
+                        interrupts = <15>;
+                        #address-cells = <1>;
+                        #size-cells = <0>;
+                        status = "disabled";
+                };
         };
         nand_cs3@62000000 {
                 compatible = "ti,davinci-nand";
diff --git a/arch/arm/mach-davinci/da8xx-dt.c b/arch/arm/mach-davinci/da8xx-dt.c
index 37c27af18fa0..a1731f0f5b97 100644
--- a/arch/arm/mach-davinci/da8xx-dt.c
+++ b/arch/arm/mach-davinci/da8xx-dt.c
@@ -37,11 +37,17 @@ static void __init da8xx_init_irq(void)
         of_irq_init(da8xx_irq_match);
 }
 
+struct of_dev_auxdata da850_auxdata_lookup[] __initdata = {
+        OF_DEV_AUXDATA("ti,davinci-i2c", 0x01c22000, "i2c_davinci.1", NULL),
+        {}
+};
+
 #ifdef CONFIG_ARCH_DAVINCI_DA850
 
 static void __init da850_init_machine(void)
 {
-        of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+        of_platform_populate(NULL, of_default_bus_match_table,
+                             da850_auxdata_lookup, NULL);
 
         da8xx_uart_clk_enable();
 }