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 17 - i2c-scl-falling-time-ns : should contain the SCL falling time in nanoseconds. 18 This value which is by default 300ns is used to compute the tLOW period. 19 20 - i2c-sda-falling-time-ns : should contain the SDA falling time in nanoseconds. 21 This value which is by default 300ns is used to compute the tHIGH period. 22 23Examples : 24 25 i2c@f0000 { 26 #address-cells = <1>; 27 #size-cells = <0>; 28 compatible = "snps,designware-i2c"; 29 reg = <0xf0000 0x1000>; 30 interrupts = <11>; 31 clock-frequency = <400000>; 32 }; 33 34 i2c@1120000 { 35 #address-cells = <1>; 36 #size-cells = <0>; 37 compatible = "snps,designware-i2c"; 38 reg = <0x1120000 0x1000>; 39 interrupt-parent = <&ictl>; 40 interrupts = <12 1>; 41 clock-frequency = <400000>; 42 i2c-sda-hold-time-ns = <300>; 43 i2c-sda-falling-time-ns = <300>; 44 i2c-scl-falling-time-ns = <300>; 45 }; 46 47 i2c@1120000 { 48 #address-cells = <1>; 49 #size-cells = <0>; 50 reg = <0x2000 0x100>; 51 clock-frequency = <400000>; 52 clocks = <&i2cclk>; 53 interrupts = <0>; 54 55 eeprom@64 { 56 compatible = "linux,slave-24c02"; 57 reg = <0x40000064>; 58 }; 59 }; 60