Add document for mfd driver hi655x pmic driver
Signed-off-by: Chen Feng puck.chen@hisilicon.com Signed-off-by: Fei Wang w.f@huawei.com Signed-off-by: Xinwei Kong kong.kongxinwei@hisilicon.com --- .../devicetree/bindings/mfd/hisilicon,hi655x.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt
diff --git a/Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt b/Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt new file mode 100644 index 0000000..3180c40 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/hisilicon,hi655x.txt @@ -0,0 +1,28 @@ +Hisilicon hi655x Power Management Integrated Circuit (PMIC) + +The hardware layout for access PMIC Hi655x from AP SoC Hi6220. +Between PMIC Hi655x and Hi6220, the physical signal channel is SSI. +We can use memory-mapped I/O to communicate. + ++----------------+ +-------------+ +| | | | +| Hi6220 | SSI bus | Hi655x | +| |-------------| | +| |(REGMAP_MMIO)| | ++----------------+ +-------------+ + +Required properties: +- compatible: Should be "hisilicon,hi655x-pmic" +- reg: Base address of PMIC on hi6220 soc +- interrupt-controller: Hi655x has internal IRQs (has own IRQ domain). +- pmic-gpios: The gpio used by pmic irq. + +Example: + pmic: pmic@f8000000 { + compatible = "hisilicon,hi655x-pmic"; + reg = <0x0 0xf8000000 0x0 0x1000>; + #interrupt-cells = <2>; + interrupt-controller; + pmic-gpios = <&gpio1 2 0>; + status = "disabled"; + }