Commit | Line | Data |
---|---|---|
af71100c RH |
1 | * Synopsys DesignWare I2C |
2 | ||
3 | Required 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 | ||
9 | Recommended properties : | |
10 | ||
11 | - clock-frequency : desired I2C bus clock frequency in Hz. | |
12 | ||
9803f868 CR |
13 | Optional 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 | ||
8e2596e8 | 17 | - i2c-scl-falling-time-ns : should contain the SCL falling time in nanoseconds. |
6468276b RB |
18 | This value which is by default 300ns is used to compute the tLOW period. |
19 | ||
8e2596e8 | 20 | - i2c-sda-falling-time-ns : should contain the SDA falling time in nanoseconds. |
6468276b RB |
21 | This value which is by default 300ns is used to compute the tHIGH period. |
22 | ||
af71100c RH |
23 | Example : |
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 | }; | |
9803f868 CR |
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>; | |
6468276b RB |
43 | i2c-sda-falling-time-ns = <300>; |
44 | i2c-scl-falling-time-ns = <300>; | |
9803f868 | 45 | }; |