diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2018-02-06 23:29:55 +0100 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2018-02-12 13:50:59 +0100 |
| commit | 61866d7fdc7007acfca2107f7d9fcb05ed0c6203 (patch) | |
| tree | 5e10c704d2c7805b31c051c21444b29fc062fddd /arch/arm/boot/dts/r8a7794-alt.dts | |
| parent | 12937bffd64f5b9970589d0b946305d14cc45e6a (diff) | |
ARM: dts: alt: use demuxer for I2C1
Create a separate bus for HDMI related I2C1 and provide fallback to GPIO.
Based on work for the r8a7790/lager by Wolfram Sang.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
[wsa: rebased, fixed aliases, switched to named GPIOs]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'arch/arm/boot/dts/r8a7794-alt.dts')
| -rw-r--r-- | arch/arm/boot/dts/r8a7794-alt.dts | 53 |
1 files changed, 37 insertions, 16 deletions
diff --git a/arch/arm/boot/dts/r8a7794-alt.dts b/arch/arm/boot/dts/r8a7794-alt.dts index 60c6515c4996..26a883484ea8 100644 --- a/arch/arm/boot/dts/r8a7794-alt.dts +++ b/arch/arm/boot/dts/r8a7794-alt.dts @@ -18,7 +18,9 @@ aliases { serial0 = &scif2; + i2c9 = &gpioi2c1; i2c10 = &gpioi2c4; + i2c11 = &i2chdmi; i2c12 = &i2cexio4; }; @@ -138,17 +140,50 @@ clock-frequency = <148500000>; }; + gpioi2c1: i2c-9 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "i2c-gpio"; + status = "disabled"; + scl-gpios = <&gpio4 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + sda-gpios = <&gpio4 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + }; + gpioi2c4: i2c-10 { #address-cells = <1>; #size-cells = <0>; compatible = "i2c-gpio"; status = "disabled"; - sda-gpios = <&gpio4 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; scl-gpios = <&gpio4 8 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; + sda-gpios = <&gpio4 9 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>; i2c-gpio,delay-us = <5>; }; /* + * A fallback to GPIO is provided for I2C1. + */ + i2chdmi: i2c-11 { + compatible = "i2c-demux-pinctrl"; + i2c-parent = <&i2c1>, <&gpioi2c1>; + i2c-bus-name = "i2c-hdmi"; + #address-cells = <1>; + #size-cells = <0>; + + composite-in@20 { + compatible = "adi,adv7180"; + reg = <0x20>; + remote = <&vin0>; + + port { + adv7180: endpoint { + bus-width = <8>; + remote-endpoint = <&vin0ep>; + }; + }; + }; + }; + + /* * I2C4 is routed to EXIO connector B, pins 73 (SCL) + 74 (SDA). * A fallback to GPIO is provided. */ @@ -324,23 +359,9 @@ &i2c1 { pinctrl-0 = <&i2c1_pins>; - pinctrl-names = "default"; + pinctrl-names = "i2c-hdmi"; - status = "okay"; clock-frequency = <400000>; - - composite-in@20 { - compatible = "adi,adv7180"; - reg = <0x20>; - remote = <&vin0>; - - port { - adv7180: endpoint { - bus-width = <8>; - remote-endpoint = <&vin0ep>; - }; - }; - }; }; &i2c4 { |