From 87ff65b598fd73022d26f4fc7519e86388dcd355 Mon Sep 17 00:00:00 2001 From: Johan Jonker Date: Thu, 5 Mar 2020 15:36:07 +0100 Subject: dt-bindings: i2c: convert rockchip i2c bindings to yaml Current dts files with 'i2c' nodes are manually verified. In order to automate this process i2c-rk3x.txt has to be converted to yaml. In the new setup i2c-rk3x.yaml will inherit properties from i2c-controller.yaml. Also change document name in MAINTAINERS. Signed-off-by: Johan Jonker Signed-off-by: Rob Herring --- .../devicetree/bindings/i2c/i2c-rk3x.yaml | 129 +++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml (limited to 'Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml') diff --git a/Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml b/Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml new file mode 100644 index 000000000000..962aefb7d052 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/i2c-rk3x.yaml @@ -0,0 +1,129 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/i2c/i2c-rk3x.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Rockchip RK3xxx I2C controller + +description: + This driver interfaces with the native I2C controller present in Rockchip + RK3xxx SoCs. + +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + +maintainers: + - Heiko Stuebner + +# Everything else is described in the common file +properties: + compatible: + oneOf: + - const: rockchip,rv1108-i2c + - const: rockchip,rk3066-i2c + - const: rockchip,rk3188-i2c + - const: rockchip,rk3228-i2c + - const: rockchip,rk3288-i2c + - const: rockchip,rk3399-i2c + - items: + - enum: + - rockchip,rk3328-i2c + - const: rockchip,rk3399-i2c + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + minItems: 1 + items: + - description: + For older hardware (rk3066, rk3188, rk3228, rk3288) + there is one clock that is used both to derive the functional clock + for the device and as the bus clock. + For newer hardware (rk3399) this clock is used to derive + the functional clock + - description: + For newer hardware (rk3399) this is the bus clock + + clock-names: + minItems: 1 + items: + - const: i2c + - const: pclk + + rockchip,grf: + $ref: /schemas/types.yaml#/definitions/phandle + description: + Required on RK3066, RK3188 the phandle of the syscon node for + the general register file (GRF) + On those SoCs an alias with the correct I2C bus ID + (bit offset in the GRF) is also required. + + clock-frequency: + default: 100000 + description: + SCL frequency to use (in Hz). If omitted, 100kHz is used. + + i2c-scl-rising-time-ns: + default: 1000 + description: + Number of nanoseconds the SCL signal takes to rise + (t(r) in I2C specification). If not specified this is assumed to be + the maximum the specification allows(1000 ns for Standard-mode, + 300 ns for Fast-mode) which might cause slightly slower communication. + + i2c-scl-falling-time-ns: + default: 300 + description: + Number of nanoseconds the SCL signal takes to fall + (t(f) in the I2C specification). If not specified this is assumed to + be the maximum the specification allows (300 ns) which might cause + slightly slower communication. + + i2c-sda-falling-time-ns: + default: 300 + description: + Number of nanoseconds the SDA signal takes to fall + (t(f) in the I2C specification). If not specified we will use the SCL + value since they are the same in nearly all cases. + +required: + - compatible + - reg + - interrupts + - clocks + - clock-names + +if: + properties: + compatible: + contains: + enum: + - rockchip,rk3066-i2c + - rockchip,rk3188-i2c + +then: + required: + - rockchip,grf + +examples: + - | + #include + #include + #include + i2c0: i2c@2002d000 { + compatible = "rockchip,rk3188-i2c"; + reg = <0x2002d000 0x1000>; + interrupts = ; + clocks = <&cru PCLK_I2C0>; + clock-names = "i2c"; + rockchip,grf = <&grf>; + i2c-scl-falling-time-ns = <100>; + i2c-scl-rising-time-ns = <800>; + #address-cells = <1>; + #size-cells = <0>; + }; -- cgit v1.2.3