1 # SPDX-License-Identifier: GPL-2.0
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>
19 # Everything else is described in the common file
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
34 - const: rockchip,rk3288-i2c
43 - const: rockchip,rk3399-i2c
55 For older hardware (rk3066, rk3188, rk3228, rk3288)
56 there is one clock that is used both to derive the functional clock
57 for the device and as the bus clock.
58 For newer hardware (rk3399) this clock is used to derive
61 For newer hardware (rk3399) this is the bus clock
70 $ref: /schemas/types.yaml#/definitions/phandle
72 Required on RK3066, RK3188 the phandle of the syscon node for
73 the general register file (GRF)
74 On those SoCs an alias with the correct I2C bus ID
75 (bit offset in the GRF) is also required.
80 SCL frequency to use (in Hz). If omitted, 100kHz is used.
82 i2c-scl-rising-time-ns:
85 Number of nanoseconds the SCL signal takes to rise
86 (t(r) in I2C specification). If not specified this is assumed to be
87 the maximum the specification allows(1000 ns for Standard-mode,
88 300 ns for Fast-mode) which might cause slightly slower communication.
90 i2c-scl-falling-time-ns:
93 Number of nanoseconds the SCL signal takes to fall
94 (t(f) in the I2C specification). If not specified this is assumed to
95 be the maximum the specification allows (300 ns) which might cause
96 slightly slower communication.
98 i2c-sda-falling-time-ns:
101 Number of nanoseconds the SDA signal takes to fall
102 (t(f) in the I2C specification). If not specified we will use the SCL
103 value since they are the same in nearly all cases.
117 - rockchip,rk3066-i2c
118 - rockchip,rk3188-i2c
124 unevaluatedProperties: false
128 #include <dt-bindings/clock/rk3188-cru-common.h>
129 #include <dt-bindings/interrupt-controller/arm-gic.h>
130 #include <dt-bindings/interrupt-controller/irq.h>
132 compatible = "rockchip,rk3188-i2c";
133 reg = <0x2002d000 0x1000>;
134 interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
135 clocks = <&cru PCLK_I2C0>;
137 rockchip,grf = <&grf>;
138 i2c-scl-falling-time-ns = <100>;
139 i2c-scl-rising-time-ns = <800>;
140 #address-cells = <1>;