ARM: dts: sun6i: Columbus: Add i2c controller for communicating with the LCD

The Colombus development kit uses an optional 2048x1536 edp panel using
an anx9804 parallel lcd to edp converter. The anx9804 chip is controlled
via an i2c bus which is connected to 2 regular gpio pins.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun6i-a31-colombus.dts b/arch/arm/boot/dts/sun6i-a31-colombus.dts
index 0cf9926d1e93bebdc333c45f83c2dfe7610f50b9..8843420a4cba9d75367041e5e23ad16a6f631462 100644 (file)
--- a/arch/arm/boot/dts/sun6i-a31-colombus.dts
+++ b/arch/arm/boot/dts/sun6i-a31-colombus.dts
@@ -60,6 +60,16 @@
        chosen {
                stdout-path = "serial0:115200n8";
        };
+
+       i2c_lcd: i2c@0 {
+               /* The lcd panel i2c interface is hooked up via gpios */
+               compatible = "i2c-gpio";
+               pinctrl-names = "default";
+               pinctrl-0 = <&i2c_lcd_pins>;
+               gpios = <&pio 0 23 GPIO_ACTIVE_HIGH>, /* PA23, sda */
+                       <&pio 0 24 GPIO_ACTIVE_HIGH>; /* PA24, scl */
+               i2c-gpio,delay-us = <5>;
+       };
 };
 
 &ehci1 {
@@ -112,6 +122,13 @@
                allwinner,drive = <SUN4I_PINCTRL_10_MA>;
                allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
        };
+
+       i2c_lcd_pins: i2c_lcd_pin@0 {
+               allwinner,pins = "PA23", "PA24";
+               allwinner,function = "gpio_out";
+               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+               allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+       };
 };
 
 &reg_usb2_vbus {