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| author | Simon Horman <horms+renesas@verge.net.au> | 2016-11-06 21:20:20 +0100 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2016-11-23 20:52:22 +0100 |
| commit | b2f15ca697a11c8df64ac6c8086ababc5c9e6060 (patch) | |
| tree | 7b5dc915a48f3f47952d471500b5bd7af1e7a1c3 /arch/arm/boot/dts | |
| parent | 1e26fcf31c5c70557689184185913881e4557bc0 (diff) | |
| download | blackbird-obmc-linux-b2f15ca697a11c8df64ac6c8086ababc5c9e6060.tar.gz blackbird-obmc-linux-b2f15ca697a11c8df64ac6c8086ababc5c9e6060.zip | |
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>
Diffstat (limited to 'arch/arm/boot/dts')
| -rw-r--r-- | arch/arm/boot/dts/r8a7790-lager.dts | 39 |
1 files changed, 37 insertions, 2 deletions
diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts index 5645444cd21a..9b9748548702 100644 --- a/arch/arm/boot/dts/r8a7790-lager.dts +++ b/arch/arm/boot/dts/r8a7790-lager.dts @@ -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 { |
