tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1I2C for R-Car platforms
2
3Required properties:
4- compatible:
5 "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC.
6 "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC.
7 "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC.
8 "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC.
9 "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC.
10 "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC.
11 "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC.
12 "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC.
13 "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC.
14 "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device.
15 "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 compatible device.
16 "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 compatible device.
17 "renesas,i2c-rcar" (deprecated)
18
19 When compatible with the generic version, nodes must list the
20 SoC-specific version corresponding to the platform first followed
21 by the generic version.
22
23- reg: physical base address of the controller and length of memory mapped
24 region.
25- interrupts: interrupt specifier.
26
27Optional properties:
28- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this
29 property indicates the default frequency 100 kHz.
30- clocks: clock specifier.
31- dmas: Must contain a list of two references to DMA specifiers, one for
32 transmission, and one for reception.
33- dma-names: Must contain a list of two DMA names, "tx" and "rx".
34
35- i2c-scl-falling-time-ns: see i2c.txt
36- i2c-scl-internal-delay-ns: see i2c.txt
37- i2c-scl-rising-time-ns: see i2c.txt
38
39Examples :
40
41i2c0: i2c@e6508000 {
42 #address-cells = <1>;
43 #size-cells = <0>;
44 compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
45 reg = <0 0xe6508000 0 0x40>;
46 interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>;
47 clocks = <&mstp9_clks R8A7791_CLK_I2C0>;
48 clock-frequency = <400000>;
49};