linux/Documentation/devicetree/bindings/i2c/i2c-designware.txt
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   1* Synopsys DesignWare I2C
   2
   3Required properties :
   4
   5 - compatible : should be "snps,designware-i2c"
   6 - reg : Offset and length of the register set for the device
   7 - interrupts : <IRQ> where IRQ is the interrupt number.
   8
   9Recommended properties :
  10
  11 - clock-frequency : desired I2C bus clock frequency in Hz.
  12
  13Optional properties :
  14 - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds.
  15   This option is only supported in hardware blocks version 1.11a or newer.
  16
  17Example :
  18
  19        i2c@f0000 {
  20                #address-cells = <1>;
  21                #size-cells = <0>;
  22                compatible = "snps,designware-i2c";
  23                reg = <0xf0000 0x1000>;
  24                interrupts = <11>;
  25                clock-frequency = <400000>;
  26        };
  27
  28        i2c@1120000 {
  29                #address-cells = <1>;
  30                #size-cells = <0>;
  31                compatible = "snps,designware-i2c";
  32                reg = <0x1120000 0x1000>;
  33                interrupt-parent = <&ictl>;
  34                interrupts = <12 1>;
  35                clock-frequency = <400000>;
  36                i2c-sda-hold-time-ns = <300>;
  37        };
  38