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:
56       - description:
59   clock-names:
62       - const: i2c
63       - const: pclk
70       On those SoCs an alias with the correct I2C bus ID
73   clock-frequency:
76       SCL frequency to use (in Hz). If omitted, 100kHz is used.
78   i2c-scl-rising-time-ns:
81       Number of nanoseconds the SCL signal takes to rise
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:
89       Number of nanoseconds the SCL signal takes to fall
90       (t(f) in the I2C specification). If not specified this is assumed to
91       be the maximum the specification allows (300 ns) which might cause
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>;