143 lines
3.8 KiB
YAML
143 lines
3.8 KiB
YAML
|
# 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 <heiko@sntech.de>
|
||
|
|
|
||
|
|
# 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,rk3036-i2c
|
||
|
|
- rockchip,rk3128-i2c
|
||
|
|
- rockchip,rk3368-i2c
|
||
|
|
- const: rockchip,rk3288-i2c
|
||
|
|
- items:
|
||
|
|
- enum:
|
||
|
|
- rockchip,px30-i2c
|
||
|
|
- rockchip,rk3308-i2c
|
||
|
|
- rockchip,rk3328-i2c
|
||
|
|
- rockchip,rk3568-i2c
|
||
|
|
- rockchip,rk3588-i2c
|
||
|
|
- rockchip,rv1126-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
|
||
|
|
|
||
|
|
unevaluatedProperties: false
|
||
|
|
|
||
|
|
examples:
|
||
|
|
- |
|
||
|
|
#include <dt-bindings/clock/rk3188-cru-common.h>
|
||
|
|
#include <dt-bindings/interrupt-controller/arm-gic.h>
|
||
|
|
#include <dt-bindings/interrupt-controller/irq.h>
|
||
|
|
i2c0: i2c@2002d000 {
|
||
|
|
compatible = "rockchip,rk3188-i2c";
|
||
|
|
reg = <0x2002d000 0x1000>;
|
||
|
|
interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
|
||
|
|
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>;
|
||
|
|
};
|