tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1I2C for R-Car platforms
2
3Required properties:
4- compatible: Must be one of
5 "renesas,i2c-rcar"
6 "renesas,i2c-r8a7778"
7 "renesas,i2c-r8a7779"
8 "renesas,i2c-r8a7790"
9 "renesas,i2c-r8a7791"
10 "renesas,i2c-r8a7792"
11 "renesas,i2c-r8a7793"
12 "renesas,i2c-r8a7794"
13 "renesas,i2c-r8a7795"
14- reg: physical base address of the controller and length of memory mapped
15 region.
16- interrupts: interrupt specifier.
17
18Optional properties:
19- clock-frequency: desired I2C bus clock frequency in Hz. The absence of this
20 property indicates the default frequency 100 kHz.
21- clocks: clock specifier.
22- dmas: Must contain a list of two references to DMA specifiers, one for
23 transmission, and one for reception.
24- dma-names: Must contain a list of two DMA names, "tx" and "rx".
25
26- i2c-scl-falling-time-ns: see i2c.txt
27- i2c-scl-internal-delay-ns: see i2c.txt
28- i2c-scl-rising-time-ns: see i2c.txt
29
30Examples :
31
32i2c0: i2c@e6508000 {
33 #address-cells = <1>;
34 #size-cells = <0>;
35 compatible = "renesas,i2c-r8a7791";
36 reg = <0 0xe6508000 0 0x40>;
37 interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>;
38 clocks = <&mstp9_clks R8A7791_CLK_I2C0>;
39 clock-frequency = <400000>;
40};