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ARM: dts: koelsch: use demuxer for I2C4 

Make it possible to fallback to GPIO for I2C4 on the EXIO-E connector.

This is based on reference work for the I2C0 core of the lager/r8a7790
by Wolfram Sang.

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased, fixed aliases, switched to named GPIOS, fixed pinmux for I2C4]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Wolfram Sang 2018-02-06 23:29:53 +01:00 committed by Simon Horman
parent 168a709994
commit be93275c4d
1 changed files with 34 additions and 0 deletions
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34
arch/arm/boot/dts/r8a7791-koelsch.dts
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@ -52,8 +52,10 @@
serial1 = &scif1;
i2c9 = &gpioi2c1;
i2c10 = &gpioi2c2;
i2c11 = &gpioi2c4;
i2c12 = &i2cexio1;
i2c13 = &i2chdmi;
i2c14 = &i2cexio4;
};
chosen {
@ -329,6 +331,16 @@
i2c-gpio,delay-us = <5>;
};
gpioi2c4: i2c-11 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "i2c-gpio";
status = "disabled";
scl-gpios = <&gpio7 13 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
sda-gpios = <&gpio7 14 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
i2c-gpio,delay-us = <5>;
};
/*
* I2C1 is routed to EXIO connector B, pins 64 (SCL) + 66 (SDA).
* A fallback to GPIO is provided.
@ -437,6 +449,18 @@
pagesize = <16>;
};
};
/*
* I2C4 is routed to EXIO connector E, pins 37 (SCL) + 39 (SDA).
* A fallback to GPIO is provided.
*/
i2cexio4: i2c-14 {
compatible = "i2c-demux-pinctrl";
i2c-parent = <&i2c4>, <&gpioi2c4>;
i2c-bus-name = "i2c-exio4";
#address-cells = <1>;
#size-cells = <0>;
};
};
&du {
@ -480,6 +504,11 @@
function = "i2c2";
};
i2c4_pins: i2c4 {
groups = "i2c4_c";
function = "i2c4";
};
du_pins: du {
groups = "du_rgb888", "du_sync", "du_disp", "du_clk_out_0";
function = "du";
@ -735,6 +764,11 @@
clock-frequency = <100000>;
};
&i2c4 {
pinctrl-0 = <&i2c4_pins>;
pinctrl-names = "i2c-exio4";
};
&i2c6 {
status = "okay";
clock-frequency = <100000>;