bindings/i2c/i2c-rk3x.yaml

1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/i2c/i2c-rk3x.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Rockchip RK3xxx I2C controller
10   This driver interfaces with the native I2C controller present in Rockchip
14   - $ref: /schemas/i2c/i2c-controller.yaml#
17   - Heiko Stuebner <heiko@sntech.de>
23       - const: rockchip,rv1108-i2c
24       - const: rockchip,rk3066-i2c
25       - const: rockchip,rk3188-i2c
26       - const: rockchip,rk3228-i2c
27       - const: rockchip,rk3288-i2c
28       - const: rockchip,rk3399-i2c
29       - items:
30           - enum:
31               - rockchip,rk3036-i2c
32               - rockchip,rk3368-i2c
33           - const: rockchip,rk3288-i2c
34       - items:
35           - enum:
36               - rockchip,px30-i2c
37               - rockchip,rk3308-i2c
38               - rockchip,rk3328-i2c
39           - const: rockchip,rk3399-i2c
50       - description:
51           For older hardware (rk3066, rk3188, rk3228, rk3288)
56       - description:
59   clock-names:
62       - const: i2c
63       - const: pclk
68       Required on RK3066, RK3188 the phandle of the syscon node for
70       On those SoCs an alias with the correct I2C bus ID
73   clock-frequency:
78   i2c-scl-rising-time-ns:
82       (t(r) in I2C specification). If not specified this is assumed to be
83       the maximum the specification allows(1000 ns for Standard-mode,
84       300 ns for Fast-mode) which might cause slightly slower communication.
86   i2c-scl-falling-time-ns:
90       (t(f) in the I2C specification). If not specified this is assumed to
94   i2c-sda-falling-time-ns:
98       (t(f) in the I2C specification). If not specified we will use the SCL
102   - compatible
103   - reg
104   - interrupts
105   - clocks
106   - clock-names
113           - rockchip,rk3066-i2c
114           - rockchip,rk3188-i2c
118     - rockchip,grf
123   - |
124     #include <dt-bindings/clock/rk3188-cru-common.h>
125     #include <dt-bindings/interrupt-controller/arm-gic.h>
126     #include <dt-bindings/interrupt-controller/irq.h>
127     i2c0: i2c@2002d000 {
128       compatible = "rockchip,rk3188-i2c";
132       clock-names = "i2c";
134       i2c-scl-falling-time-ns = <100>;
135       i2c-scl-rising-time-ns = <800>;
136       #address-cells = <1>;
137       #size-cells = <0>;