Create a separate bus for HDMI related I2C2 and provide fallback to GPIO.
Based on work for the r8a7790/lager by Wolfram Sang.
Signed-off-by: Simon Horman <horms+rene...@verge.net.au>
[wsa: rebased, fixed aliases, switched to named GPIOs]
Signed-off-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
---
arch/arm/boot/dts/r8a7791-porter.dts | 128 ++++++++++++++++++++---------------
1 file changed, 75 insertions(+), 53 deletions(-)
diff --git a/arch/arm/boot/dts/r8a7791-porter.dts
b/arch/arm/boot/dts/r8a7791-porter.dts
index eb374956294f69..0a503a1ed95b44 100644
--- a/arch/arm/boot/dts/r8a7791-porter.dts
+++ b/arch/arm/boot/dts/r8a7791-porter.dts
@@ -29,6 +29,8 @@
aliases {
serial0 = &scif0;
+ i2c9 = &gpioi2c2;
+ i2c10 = &i2chdmi;
};
chosen {
@@ -135,6 +137,78 @@
clocks = <&x14_clk>;
};
};
+
+ gpioi2c2: i2c-9 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "i2c-gpio";
+ status = "disabled";
+ scl-gpios = <&gpio2 6 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ sda-gpios = <&gpio2 7 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ i2c-gpio,delay-us = <5>;
+ };
+
+ /*
+ * A fallback to GPIO is provided for I2C2.
+ */
+ i2chdmi: i2c-10 {
+ compatible = "i2c-demux-pinctrl";
+ i2c-parent = <&i2c2>, <&gpioi2c2>;
+ i2c-bus-name = "i2c-hdmi";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ak4642: codec@12 {
+ compatible = "asahi-kasei,ak4642";
+ #sound-dai-cells = <0>;
+ reg = <0x12>;
+ };
+
+ composite-in@20 {
+ compatible = "adi,adv7180";
+ reg = <0x20>;
+ remote = <&vin0>;
+
+ port {
+ adv7180: endpoint {
+ bus-width = <8>;
+ remote-endpoint = <&vin0ep>;
+ };
+ };
+ };
+
+ hdmi@39 {
+ compatible = "adi,adv7511w";
+ reg = <0x39>;
+ interrupt-parent = <&gpio3>;
+ interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
+
+ adi,input-depth = <8>;
+ adi,input-colorspace = "rgb";
+ adi,input-clock = "1x";
+ adi,input-style = <1>;
+ adi,input-justification = "evenly";
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ adv7511_in: endpoint {
+ remote-endpoint = <&du_out_rgb>;
+ };
+ };
+
+ port@1 {
+ reg = <1>;
+ adv7511_out: endpoint {
+ remote-endpoint = <&hdmi_con>;
+ };
+ };
+ };
+ };
+ };
};
&extal_clk {
@@ -296,61 +370,9 @@
&i2c2 {
pinctrl-0 = <&i2c2_pins>;
- pinctrl-names = "default";
+ pinctrl-names = "i2c-hdmi";
- status = "okay";
clock-frequency = <400000>;
-
- ak4642: codec@12 {
- compatible = "asahi-kasei,ak4642";
- #sound-dai-cells = <0>;
- reg = <0x12>;
- };
-
- composite-in@20 {
- compatible = "adi,adv7180";
- reg = <0x20>;
- remote = <&vin0>;
-
- port {
- adv7180: endpoint {
- bus-width = <8>;
- remote-endpoint = <&vin0ep>;
- };
- };
- };
-
- hdmi@39 {
- compatible = "adi,adv7511w";
- reg = <0x39>;
- interrupt-parent = <&gpio3>;
- interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
-
- adi,input-depth = <8>;
- adi,input-colorspace = "rgb";
- adi,input-clock = "1x";
- adi,input-style = <1>;
- adi,input-justification = "evenly";
-
- ports {
- #address-cells = <1>;
- #size-cells = <0>;
-
- port@0 {
- reg = <0>;
- adv7511_in: endpoint {
- remote-endpoint = <&du_out_rgb>;
- };
- };
-
- port@1 {
- reg = <1>;
- adv7511_out: endpoint {
- remote-endpoint = <&hdmi_con>;
- };
- };
- };
- };
};
&sata0 {
--
2.11.0
