ARM: dts: cm-t335: add basic support for I2C

Add pinmux configuration for I2C0 and I2C1 pins.
Add description for I2C0 bus, set clock frequency to 400kHz.
Add child nodes for 24c02 EEPROM and em3027 RTC on I2C0 bus.

Signed-off-by: Ilya Ledvich <ilya@compulab.co.il>
Signed-off-by: Uri Mashiach <uri.mashiach@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/boot/dts/am335x-cm-t335.dts b/arch/arm/boot/dts/am335x-cm-t335.dts
index e18859ec2a7d615b72e3d099d101d98563fa0742..9fc2f011ea4797f63bd6a6da70fe9bd0e1936f12 100644 (file)
--- a/arch/arm/boot/dts/am335x-cm-t335.dts
+++ b/arch/arm/boot/dts/am335x-cm-t335.dts
@@ -37,6 +37,24 @@
        pinctrl-names = "default";
        pinctrl-0 = <>;
 
+       i2c0_pins: pinmux_i2c0_pins {
+               pinctrl-single,pins = <
+                       /* i2c0_sda.i2c0_sda */
+                       AM33XX_IOPAD(0x988, PIN_INPUT_PULLUP | MUX_MODE0)
+                       /* i2c0_scl.i2c0_scl */
+                       AM33XX_IOPAD(0x98c, PIN_INPUT_PULLUP | MUX_MODE0)
+               >;
+       };
+
+       i2c1_pins: pinmux_i2c1_pins {
+               pinctrl-single,pins = <
+                       /* uart0_ctsn.i2c1_sda */
+                       AM33XX_IOPAD(0x968, PIN_INPUT_PULLUP | MUX_MODE2)
+                       /* uart0_rtsn.i2c1_scl */
+                       AM33XX_IOPAD(0x96c, PIN_INPUT_PULLUP | MUX_MODE2)
+               >;
+       };
+
        gpio_led_pins: pinmux_gpio_led_pins {
                pinctrl-single,pins = <
                        /* gpmc_csn3.gpio2_0 */
@@ -60,3 +78,22 @@
 
        status = "okay";
 };
+
+&i2c0 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&i2c0_pins>;
+
+       status = "okay";
+       clock-frequency = <400000>;
+       /* CM-T335 board EEPROM */
+       eeprom: 24c02@50 {
+               compatible = "atmel,24c02";
+               reg = <0x50>;
+               pagesize = <16>;
+       };
+       /* Real Time Clock */
+       ext_rtc: em3027@56 {
+               compatible = "emmicro,em3027";
+               reg = <0x56>;
+       };
+};