134 lines
3.3 KiB
YAML
134 lines
3.3 KiB
YAML
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# 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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$id: http://devicetree.org/schemas/i2c/i2c-exynos5.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Samsung's High Speed I2C controller
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maintainers:
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- Krzysztof Kozlowski <krzk@kernel.org>
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description: |
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The Samsung's High Speed I2C controller is used to interface with I2C devices
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at various speeds ranging from 100kHz to 3.4MHz.
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In case the HSI2C controller is encapsulated within USI block (it's the case
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e.g. for Exynos850 and Exynos Auto V9 SoCs), it might be also necessary to
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define USI node in device tree file, choosing "i2c" configuration. Please see
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Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml for details.
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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,exynos5250-hsi2c # Exynos5250 and Exynos5420
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- samsung,exynos5260-hsi2c # Exynos5260
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- samsung,exynos7-hsi2c # Exynos7
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- samsung,exynosautov9-hsi2c # ExynosAutoV9 and Exynos850
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- const: samsung,exynos5-hsi2c # Exynos5250 and Exynos5420
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deprecated: true
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clock-frequency:
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default: 100000
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description:
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Desired operating frequency in Hz of the bus.
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If not specified, the bus operates in fast-speed mode at 100kHz.
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If specified, the bus operates in high-speed mode only if the
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clock-frequency is >= 1MHz.
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clocks:
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minItems: 1
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items:
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- description: I2C operating clock
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- description: Bus clock (APB)
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clock-names:
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minItems: 1
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items:
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- const: hsi2c
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- const: hsi2c_pclk
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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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,exynosautov9-hsi2c
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then:
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properties:
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clocks:
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minItems: 2
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clock-names:
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minItems: 2
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required:
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- clock-names
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else:
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properties:
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clocks:
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maxItems: 1
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/exynos5420.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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hsi2c_8: i2c@12e00000 {
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compatible = "samsung,exynos5250-hsi2c";
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reg = <0x12e00000 0x1000>;
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interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
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#address-cells = <1>;
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#size-cells = <0>;
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clock-frequency = <100000>;
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clocks = <&clock CLK_USI4>;
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clock-names = "hsi2c";
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pmic@66 {
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/* compatible = "samsung,s2mps11-pmic"; */
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reg = <0x66>;
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};
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};
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- |
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#include <dt-bindings/clock/exynos850.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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hsi2c_2: i2c@138c0000 {
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compatible = "samsung,exynosautov9-hsi2c";
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reg = <0x138c0000 0xc0>;
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interrupts = <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&cmu_peri CLK_GOUT_HSI2C2_IPCLK>,
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<&cmu_peri CLK_GOUT_HSI2C2_PCLK>;
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clock-names = "hsi2c", "hsi2c_pclk";
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pmic@66 {
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/* compatible = "samsung,s2mps11-pmic"; */
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reg = <0x66>;
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};
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};
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