iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ARM: dts: koelsch: use demuxer for I2C1

Browse Source 
Make it possible to fallback to GPIO for I2C1 on the EXIO-C 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 and fixed aliases]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
Simon Horman 2016-11-06 21:20:23 +01:00
parent b2f15ca697
commit 6723438b3b
1 changed files with 35 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
arch/arm/boot/dts/r8a7791-koelsch.dts
View File

@ -50,6 +50,8 @@
aliases {
serial0 = &scif0;
serial1 = &scif1;
i2c9 = &gpioi2c1;
i2c12 = &i2cexio1;
};
chosen {
@ -298,6 +300,29 @@
#clock-cells = <0>;
clock-frequency = <148500000>;
};
gpioi2c1: i2c-9 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "i2c-gpio";
status = "disabled";
gpios = <&gpio7 16 GPIO_ACTIVE_HIGH /* sda */
&gpio7 15 GPIO_ACTIVE_HIGH /* scl */
>;
i2c-gpio,delay-us = <5>;
};
/*
* I2C1 is routed to EXIO connector B, pins 64 (SCL) + 66 (SDA).
* A fallback to GPIO is provided.
*/
i2cexio1: i2c-12 {
compatible = "i2c-demux-pinctrl";
i2c-parent = <&i2c1>, <&gpioi2c1>;
i2c-bus-name = "i2c-exio1";
#address-cells = <1>;
#size-cells = <0>;
};
};
&du {
@ -333,6 +358,11 @@
pinctrl-0 = <&scif_clk_pins>;
pinctrl-names = "default";
i2c1_pins: i2c1 {
groups = "i2c1";
function = "i2c1";
};
i2c2_pins: i2c2 {
groups = "i2c2";
function = "i2c2";
@ -581,6 +611,11 @@
};
};
&i2c1 {
pinctrl-0 = <&i2c1_pins>;
pinctrl-names = "i2c-exio1";
};
&i2c2 {
pinctrl-0 = <&i2c2_pins>;
pinctrl-names = "default";