* Synopsys DesignWare I2C Required properties : - compatible : should be "snps,designware-i2c" or "mscc,ocelot-i2c" with "snps,designware-i2c" for fallback - reg : Offset and length of the register set for the device - interrupts : where IRQ is the interrupt number. - clocks : phandles for the clocks, see the description of clock-names below. The phandle for the "ic_clk" clock is required. The phandle for the "pclk" clock is optional. If a single clock is specified but no clock-name, it is the "ic_clk" clock. If both clocks are listed, the "ic_clk" must be first. Recommended properties : - clock-frequency : desired I2C bus clock frequency in Hz. Optional properties : - clock-names : Contains the names of the clocks: "ic_clk", for the core clock used to generate the external I2C clock. "pclk", the interface clock, required for register access. - reg : for "mscc,ocelot-i2c", a second register set to configure the SDA hold time, named ICPU_CFG:TWI_DELAY in the datasheet. - i2c-sda-hold-time-ns : should contain the SDA hold time in nanoseconds. This option is only supported in hardware blocks version 1.11a or newer and on Microsemi SoCs ("mscc,ocelot-i2c" compatible). - i2c-scl-falling-time-ns : should contain the SCL falling time in nanoseconds. This value which is by default 300ns is used to compute the tLOW period. - i2c-sda-falling-time-ns : should contain the SDA falling time in nanoseconds. This value which is by default 300ns is used to compute the tHIGH period. Examples : i2c@f0000 { #address-cells = <1>; #size-cells = <0>; compatible = "snps,designware-i2c"; reg = <0xf0000 0x1000>; interrupts = <11>; clock-frequency = <400000>; }; i2c@1120000 { #address-cells = <1>; #size-cells = <0>; compatible = "snps,designware-i2c"; reg = <0x1120000 0x1000>; interrupt-parent = <&ictl>; interrupts = <12 1>; clock-frequency = <400000>; i2c-sda-hold-time-ns = <300>; i2c-sda-falling-time-ns = <300>; i2c-scl-falling-time-ns = <300>; }; i2c@1120000 { #address-cells = <1>; #size-cells = <0>; reg = <0x2000 0x100>; clock-frequency = <400000>; clocks = <&i2cclk>; interrupts = <0>; eeprom@64 { compatible = "linux,slave-24c02"; reg = <0x40000064>; }; };