+++ /dev/null
-* Rockchip RK3xxx I2C controller
-
-This driver interfaces with the native I2C controller present in Rockchip
-RK3xxx SoCs.
-
-Required properties :
-
- - reg : Offset and length of the register set for the device
- - compatible: should be one of the following:
- - "rockchip,rv1108-i2c": for rv1108
- - "rockchip,rk3066-i2c": for rk3066
- - "rockchip,rk3188-i2c": for rk3188
- - "rockchip,rk3228-i2c": for rk3228
- - "rockchip,rk3288-i2c": for rk3288
- - "rockchip,rk3328-i2c", "rockchip,rk3399-i2c": for rk3328
- - "rockchip,rk3399-i2c": for rk3399
- - interrupts : interrupt number
- - clocks: See ../clock/clock-bindings.txt
- - For older hardware (rk3066, rk3188, rk3228, rk3288):
- - There is one clock that's used both to derive the functional clock
- for the device and as the bus clock.
- - For newer hardware (rk3399): specified by name
- - "i2c": This is used to derive the functional clock.
- - "pclk": This is the bus clock.
-
-Required on RK3066, RK3188 :
-
- - rockchip,grf : 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.
-
-Optional properties :
-
- - clock-frequency : SCL frequency to use (in Hz). If omitted, 100kHz is used.
- - i2c-scl-rising-time-ns : 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 : 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 : Number of nanoseconds the SDA signal takes to fall
- (t(f) in the I2C specification). If not specified we'll use the SCL
- value since they are the same in nearly all cases.
-
-Example:
-
-aliases {
- i2c0 = &i2c0;
-}
-
-i2c0: i2c@2002d000 {
- compatible = "rockchip,rk3188-i2c";
- reg = <0x2002d000 0x1000>;
- interrupts = <GIC_SPI 40 IRQ_TYPE_LEVEL_HIGH>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- rockchip,grf = <&grf>;
-
- clock-names = "i2c";
- clocks = <&cru PCLK_I2C0>;
-
- i2c-scl-rising-time-ns = <800>;
- i2c-scl-falling-time-ns = <100>;
-};
--- /dev/null
+# 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,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 <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>;
+ };
projects / openwrt / staging / blogic.git / commitdiff