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ARM: dts: alt: use demuxer for I2C1

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Create a separate bus for HDMI related I2C1 and provide fallback to GPIO.

Based on work for the r8a7790/lager by Wolfram Sang.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased, fixed aliases, switched to named GPIOs]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Wolfram Sang 2018-02-06 23:29:55 +01:00 committed by Simon Horman
parent 12937bffd6
commit 61866d7fdc
1 changed files with 37 additions and 16 deletions
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53
arch/arm/boot/dts/r8a7794-alt.dts
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@ -18,7 +18,9 @@
aliases {
serial0 = &scif2;
i2c9 = &gpioi2c1;
i2c10 = &gpioi2c4;
i2c11 = &i2chdmi;
i2c12 = &i2cexio4;
};
@ -138,16 +140,49 @@
clock-frequency = <148500000>;
};
gpioi2c1: i2c-9 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "i2c-gpio";
status = "disabled";
scl-gpios = <&gpio4 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio4 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
};
gpioi2c4: i2c-10 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "i2c-gpio";
status = "disabled";
sda-gpios = <&gpio4 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
scl-gpios = <&gpio4 8 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio4 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
i2c-gpio,delay-us = <5>;
};
/*
* A fallback to GPIO is provided for I2C1.
*/
i2chdmi: i2c-11 {
compatible = "i2c-demux-pinctrl";
i2c-parent = <&i2c1>, <&gpioi2c1>;
i2c-bus-name = "i2c-hdmi";
#address-cells = <1>;
#size-cells = <0>;
composite-in@20 {
compatible = "adi,adv7180";
reg = <0x20>;
remote = <&vin0>;
port {
adv7180: endpoint {
bus-width = <8>;
remote-endpoint = <&vin0ep>;
};
};
};
};
/*
* I2C4 is routed to EXIO connector B, pins 73 (SCL) + 74 (SDA).
* A fallback to GPIO is provided.
@ -324,23 +359,9 @@
&i2c1 {
pinctrl-0 = <&i2c1_pins>;
pinctrl-names = "default";
pinctrl-names = "i2c-hdmi";
status = "okay";
clock-frequency = <400000>;
composite-in@20 {
compatible = "adi,adv7180";
reg = <0x20>;
remote = <&vin0>;
port {
adv7180: endpoint {
bus-width = <8>;
remote-endpoint = <&vin0ep>;
};
};
};
};
&i2c4 {