This board from OLIMEX is using the three I2C controllers present on A10S:
  * I2C-0 connects to the AXP152 PMU
  * I2C-1 holds an AT24C16BN-SH EEPROM with the MAC address for ethernet
  * I2C-2 is used for UEXT modules.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
                        pinctrl-0 = <&uart3_pins_a>;
                        status = "okay";
                };
+
+               i2c0: i2c@01c2ac00 {
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&i2c0_pins_a>;
+                       status = "okay";
+               };
+
+               i2c1: i2c@01c2b000 {
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&i2c1_pins_a>;
+                       status = "okay";
+               };
+
+               i2c2: i2c@01c2b400 {
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&i2c2_pins_a>;
+                       status = "okay";
+               };
        };
 
        leds {