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Samsung Exynos SoC reuses several devices from older designs, thus historically we kept the old (block's) compatible only. This works fine and there is no bug here, however guidelines expressed in Documentation/devicetree/bindings/writing-bindings.rst state that: 1. Compatibles should be specific. 2. We should add new compatibles in case of bugs or features. Add compatibles specific to each SoC in front of all old-SoC-like compatibles. Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Wolfram Sang <wsa@kernel.org> Link: https://lore.kernel.org/r/20231108104343.24192-4-krzysztof.kozlowski@linaro.org Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
171 lines
4.3 KiB
YAML
171 lines
4.3 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i2c/samsung,s3c2410-i2c.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Samsung S3C/S5P/Exynos SoC I2C Controller
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maintainers:
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- Krzysztof Kozlowski <krzk@kernel.org>
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properties:
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compatible:
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oneOf:
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- enum:
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- samsung,s3c2410-i2c
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- samsung,s3c2440-i2c
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# For s3c2440-like I2C used inside HDMIPHY block found on several SoCs:
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- samsung,s3c2440-hdmiphy-i2c
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# For s3c2440-like I2C used as a host to SATA PHY controller on an
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# internal bus:
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- samsung,exynos5-sata-phy-i2c
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- items:
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- enum:
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- samsung,exynos7885-i2c
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- samsung,exynos850-i2c
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- const: samsung,s3c2440-i2c
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'#address-cells':
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const: 1
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: i2c
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gpios:
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description: |
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The order of the GPIOs should be the following:: <SDA, SCL>. The GPIO
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specifier depends on the gpio controller. Required in all cases except
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for "samsung,s3c2440-hdmiphy-i2c" whose input/output lines are
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permanently wired to the respective client.
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This property is deprecated. Use "pinctrl-0" and "pinctrl-names" instead.
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deprecated: true
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interrupts:
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maxItems: 1
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reg:
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maxItems: 1
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samsung,i2c-max-bus-freq:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Desired frequency in Hz of the bus.
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default: 100000
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samsung,i2c-sda-delay:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Delay (in ns) applied to data line (SDA) edges.
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default: 0
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samsung,i2c-slave-addr:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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Slave address in multi-master environment.
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default: 0
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samsung,sysreg-phandle:
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$ref: /schemas/types.yaml#/definitions/phandle
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description: Pandle to syscon used to control the system registers.
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'#size-cells':
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const: 0
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required:
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- compatible
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- reg
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allOf:
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- $ref: /schemas/i2c/i2c-controller.yaml#
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- if:
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properties:
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compatible:
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contains:
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enum:
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- samsung,s3c2440-hdmiphy-i2c
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- samsung,exynos5-sata-phy-i2c
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then:
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properties:
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gpios: false
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- if:
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properties:
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compatible:
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contains:
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enum:
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- samsung,s3c2410-i2c
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- samsung,s3c2440-i2c
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- samsung,s3c2440-hdmiphy-i2c
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then:
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required:
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- interrupts
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/exynos5250.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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i2c@12c60000 {
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compatible = "samsung,s3c2440-i2c";
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reg = <0x12C60000 0x100>;
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interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&clock CLK_I2C0>;
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clock-names = "i2c";
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pinctrl-names = "default";
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pinctrl-0 = <&i2c0_bus>;
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samsung,sysreg-phandle = <&sysreg_system_controller>;
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samsung,i2c-sda-delay = <100>;
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samsung,i2c-max-bus-freq = <20000>;
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samsung,i2c-slave-addr = <0x66>;
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eeprom@50 {
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compatible = "samsung,s524ad0xd1", "atmel,24c128";
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reg = <0x50>;
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};
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};
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i2c@12ce0000 {
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compatible = "samsung,s3c2440-hdmiphy-i2c";
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reg = <0x12CE0000 0x1000>;
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interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&clock CLK_I2C_HDMI>;
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clock-names = "i2c";
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samsung,i2c-sda-delay = <100>;
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samsung,i2c-max-bus-freq = <66000>;
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phy-i2c@38 {
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compatible = "samsung,exynos4212-hdmiphy";
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reg = <0x38>;
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};
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};
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i2c@121d0000 {
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compatible = "samsung,exynos5-sata-phy-i2c";
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reg = <0x121D0000 0x100>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&clock CLK_SATA_PHYI2C>;
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clock-names = "i2c";
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samsung,i2c-sda-delay = <100>;
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samsung,i2c-max-bus-freq = <40000>;
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phy-i2c@38 {
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compatible = "samsung,exynos-sataphy-i2c";
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reg = <0x38>;
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};
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};
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