Documentation/devicetree/bindings/i2c/i2c-exynos5.txt

   1 * Samsung's High Speed I2C controller
   2
   3 The Samsung's High Speed I2C controller is used to interface with I2C devices
   4 at various speeds ranging from 100khz to 3.4Mhz.
   5
   6 Required properties:
   7   - compatible: value should be.
   8         -> "samsung,exynos5-hsi2c", (DEPRECATED)
   9                                 for i2c compatible with HSI2C available
  10                                 on Exynos5250 and Exynos5420 SoCs.
  11         -> "samsung,exynos5250-hsi2c", for i2c compatible with HSI2C available
  12                                 on Exynos5250 and Exynos5420 SoCs.
  13         -> "samsung,exynos5260-hsi2c", for i2c compatible with HSI2C available
  14                                 on Exynos5260 SoCs.
  15
  16   - reg: physical base address of the controller and length of memory mapped
  17     region.
  18   - interrupts: interrupt number to the cpu.
  19   - #address-cells: always 1 (for i2c addresses)
  20   - #size-cells: always 0
  21
  22   - Pinctrl:
  23     - pinctrl-0: Pin control group to be used for this controller.
  24     - pinctrl-names: Should contain only one value - "default".
  25
  26 Optional properties:
  27   - clock-frequency: Desired operating frequency in Hz of the bus.
  28     -> If not specified, the bus operates in fast-speed mode at
  29        at 100khz.
  30     -> If specified, the bus operates in high-speed mode only if the
  31        clock-frequency is >= 1Mhz.
  32
  33 Example:
  34
  35 hsi2c@12ca0000 {
  36         compatible = "samsung,exynos5250-hsi2c";
  37         reg = <0x12ca0000 0x100>;
  38         interrupts = <56>;
  39         clock-frequency = <100000>;
  40
  41         pinctrl-0 = <&i2c4_bus>;
  42         pinctrl-names = "default";
  43
  44         #address-cells = <1>;
  45         #size-cells = <0>;
  46
  47         s2mps11_pmic@66 {
  48                 compatible = "samsung,s2mps11-pmic";
  49                 reg = <0x66>;
  50         };
  51 };