GNU Linux-libre 4.14.266-gnu1
[releases.git] / Documentation / devicetree / bindings / mfd / hisilicon,hi655x.txt
1 Hisilicon Hi655x Power Management Integrated Circuit (PMIC)
2
3 The hardware layout for access PMIC Hi655x from AP SoC Hi6220.
4 Between PMIC Hi655x and Hi6220, the physical signal channel is SSI.
5 We can use memory-mapped I/O to communicate.
6
7 +----------------+             +-------------+
8 |                |             |             |
9 |    Hi6220      |   SSI bus   |   Hi655x    |
10 |                |-------------|             |
11 |                |(REGMAP_MMIO)|             |
12 +----------------+             +-------------+
13
14 Required properties:
15 - compatible:           Should be "hisilicon,hi655x-pmic".
16 - reg:                  Base address of PMIC on Hi6220 SoC.
17 - interrupt-controller: Hi655x has internal IRQs (has own IRQ domain).
18 - pmic-gpios:           The GPIO used by PMIC IRQ.
19 - #clock-cells:         From common clock binding; shall be set to 0
20
21 Optional properties:
22 - clock-output-names: From common clock binding to override the
23   default output clock name
24
25 Example:
26         pmic: pmic@f8000000 {
27                 compatible = "hisilicon,hi655x-pmic";
28                 reg = <0x0 0xf8000000 0x0 0x1000>;
29                 interrupt-controller;
30                 #interrupt-cells = <2>;
31                 pmic-gpios = <&gpio1 2 GPIO_ACTIVE_HIGH>;
32                 #clock-cells = <0>;
33         }