GNU Linux-libre 4.19.264-gnu1
[releases.git] / Documentation / devicetree / bindings / i2c / i2c-exynos5.txt
1 * Samsung's High Speed I2C controller
2
3 The Samsung's High Speed I2C controller is used to interface with I2C devices
4 at various speeds ranging from 100khz to 3.4Mhz.
5
6 Required properties:
7   - compatible: value should be.
8         -> "samsung,exynos5-hsi2c", (DEPRECATED)
9                                 for i2c compatible with HSI2C available
10                                 on Exynos5250 and Exynos5420 SoCs.
11         -> "samsung,exynos5250-hsi2c", for i2c compatible with HSI2C available
12                                 on Exynos5250 and Exynos5420 SoCs.
13         -> "samsung,exynos5260-hsi2c", for i2c compatible with HSI2C available
14                                 on Exynos5260 SoCs.
15         -> "samsung,exynos7-hsi2c", for i2c compatible with HSI2C available
16                                 on Exynos7 SoCs.
17
18   - reg: physical base address of the controller and length of memory mapped
19     region.
20   - interrupts: interrupt number to the cpu.
21   - #address-cells: always 1 (for i2c addresses)
22   - #size-cells: always 0
23
24   - Pinctrl:
25     - pinctrl-0: Pin control group to be used for this controller.
26     - pinctrl-names: Should contain only one value - "default".
27
28 Optional properties:
29   - clock-frequency: Desired operating frequency in Hz of the bus.
30     -> If not specified, the bus operates in fast-speed mode at
31        at 100khz.
32     -> If specified, the bus operates in high-speed mode only if the
33        clock-frequency is >= 1Mhz.
34
35 Example:
36
37 hsi2c@12ca0000 {
38         compatible = "samsung,exynos5250-hsi2c";
39         reg = <0x12ca0000 0x100>;
40         interrupts = <56>;
41         clock-frequency = <100000>;
42
43         pinctrl-0 = <&i2c4_bus>;
44         pinctrl-names = "default";
45
46         #address-cells = <1>;
47         #size-cells = <0>;
48
49         s2mps11_pmic@66 {
50                 compatible = "samsung,s2mps11-pmic";
51                 reg = <0x66>;
52         };
53 };