61 lines
2.3 KiB
Plaintext
61 lines
2.3 KiB
Plaintext
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* Samsung's I2C controller
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The Samsung's I2C controller is used to interface with I2C devices.
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Required properties:
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- compatible: value should be either of the following.
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(a) "samsung, s3c2410-i2c", for i2c compatible with s3c2410 i2c.
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(b) "samsung, s3c2440-i2c", for i2c compatible with s3c2440 i2c.
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(c) "samsung, s3c2440-hdmiphy-i2c", for s3c2440-like i2c used
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inside HDMIPHY block found on several samsung SoCs
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(d) "samsung, exynos5440-i2c", for s3c2440-like i2c used
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on EXYNOS5440 which does not need GPIO configuration.
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(e) "samsung, exynos5-sata-phy-i2c", for s3c2440-like i2c used as
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a host to SATA PHY controller on an internal bus.
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- reg: physical base address of the controller and length of memory mapped
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region.
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- interrupts: interrupt number to the cpu.
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- samsung,i2c-sda-delay: Delay (in ns) applied to data line (SDA) edges.
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Required for all cases except "samsung,s3c2440-hdmiphy-i2c":
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- Samsung GPIO variant (deprecated):
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- gpios: The order of the gpios should be the following: <SDA, SCL>.
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The gpio specifier depends on the gpio controller. Required in all
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cases except for "samsung,s3c2440-hdmiphy-i2c" whose input/output
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lines are permanently wired to the respective clienta
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- Pinctrl variant (preferred, if available):
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- pinctrl-0: Pin control group to be used for this controller.
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- pinctrl-names: Should contain only one value - "default".
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Optional properties:
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- samsung,i2c-slave-addr: Slave address in multi-master environment. If not
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specified, default value is 0.
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- samsung,i2c-max-bus-freq: Desired frequency in Hz of the bus. If not
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specified, the default value in Hz is 100000.
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- samsung,sysreg-phandle - handle to syscon used to control the system registers
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Example:
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i2c@13870000 {
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compatible = "samsung,s3c2440-i2c";
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reg = <0x13870000 0x100>;
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interrupts = <345>;
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samsung,i2c-sda-delay = <100>;
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samsung,i2c-max-bus-freq = <100000>;
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/* Samsung GPIO variant begins here */
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gpios = <&gpd1 2 0 /* SDA */
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&gpd1 3 0 /* SCL */>;
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/* Samsung GPIO variant ends here */
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/* Pinctrl variant begins here */
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pinctrl-0 = <&i2c3_bus>;
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pinctrl-names = "default";
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/* Pinctrl variant ends here */
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#address-cells = <1>;
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#size-cells = <0>;
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wm8994@1a {
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compatible = "wlf,wm8994";
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reg = <0x1a>;
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};
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};
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