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

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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>
This commit is contained in:
Hans de Goede 2015-08-07 17:22:35 +02:00 • committed by Maxime Ripard
parent 9ff5052f75
commit 465274d73c
1 changed files with 17 additions and 0 deletions
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17
arch/arm/boot/dts/sun6i-a31-colombus.dts
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@ -60,6 +60,16 @@
chosen { chosen {
stdout-path = "serial0:115200n8"; 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 { &ehci1 {
@ -112,6 +122,13 @@
allwinner,drive = <SUN4I_PINCTRL_10_MA>; allwinner,drive = <SUN4I_PINCTRL_10_MA>;
allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; 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 { &reg_usb2_vbus {