diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-02-07 01:29:53 +0300 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2018-02-12 15:50:58 +0300 |
| commit | be93275c4dade2d089d495f38a09e62712ea4e39 (patch) | |
| tree | b638da3c0efef034076df4b1ee35376943cfa3de /arch | |
| parent | 168a70999401e516fdf63dca742218bab04996a4 (diff) | |
| download | linux-be93275c4dade2d089d495f38a09e62712ea4e39.tar.xz | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boot/dts/r8a7791-koelsch.dts | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/r8a7791-koelsch.dts b/arch/arm/boot/dts/r8a7791-koelsch.dts index 4b20db197de6..f40321a1c917 100644 --- a/arch/arm/boot/dts/r8a7791-koelsch.dts +++ b/arch/arm/boot/dts/r8a7791-koelsch.dts @@ -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>; |