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