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ARM: dts: lager: use demuxer for IIC1/I2C1 

Make it possible to select which I2C1 IP core you want to run on the
EXIO-A connector.

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

Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased and fixed aliases]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Simon Horman 2016-11-06 21:20:20 +01:00
parent 1e26fcf31c
commit b2f15ca697
1 changed files with 37 additions and 2 deletions
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39
arch/arm/boot/dts/r8a7790-lager.dts
View File

@ -50,7 +50,9 @@
aliases {
serial0 = &scif0;
serial1 = &scifa1;
i2c8 = &gpioi2c1;
i2c10 = &i2cexio0;
i2c11 = &i2cexio1;
};
chosen {
@ -265,6 +267,17 @@
clock-frequency = <148500000>;
};
gpioi2c1: i2c-8 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "i2c-gpio";
status = "disabled";
gpios = <&gpio1 17 GPIO_ACTIVE_HIGH /* sda */
&gpio1 16 GPIO_ACTIVE_HIGH /* scl */
>;
i2c-gpio,delay-us = <5>;
};
/*
* IIC0/I2C0 is routed to EXIO connector A, pins 114 (SCL) + 116 (SDA) only.
* We use the I2C demuxer, so the desired IP core can be selected at runtime
@ -283,6 +296,19 @@
#address-cells = <1>;
#size-cells = <0>;
};
/*
* IIC1/I2C1 is routed to EXIO connector A, pins 78 (SCL) + 80 (SDA).
* This is similar to the arangement described for i2cexio0 (above)
* with a fallback to GPIO also provided.
*/
i2cexio1: i2c-11 {
compatible = "i2c-demux-pinctrl";
i2c-parent = <&iic1>, <&i2c1>, <&gpioi2c1>;
i2c-bus-name = "i2c-exio1";
#address-cells = <1>;
#size-cells = <0>;
};
};
&du {
@ -405,6 +431,11 @@
function = "iic0";
};
i2c1_pins: i2c1 {
groups = "i2c1";
function = "i2c1";
};
iic1_pins: iic1 {
groups = "iic1";
function = "iic1";
@ -606,10 +637,14 @@
pinctrl-names = "i2c-exio0";
};
&i2c1 {
pinctrl-0 = <&i2c1_pins>;
pinctrl-names = "i2c-exio1";
};
&iic1 {
status = "okay";
pinctrl-0 = <&iic1_pins>;
pinctrl-names = "default";
pinctrl-names = "i2c-exio1";
};
&iic2 {