Kernel-4.18.0-80.el8_maxim,max77686

Binding for Maxim MAX77686/MAX77802/MAX77620 32k clock generator block

This is a part of device tree bindings of MAX77686/MAX77802/MAX77620
multi-function device. More information can be found in MFD DT binding
doc as follows:
bindings/mfd/max77686.txt for MAX77686 and
bindings/mfd/max77802.txt for MAX77802 and
bindings/mfd/max77620.txt for MAX77620.

The MAX77686 contains three 32.768khz clock outputs that can be controlled
(gated/ungated) over I2C. Clocks are defined as preprocessor macros in
dt-bindings/clock/maxim,max77686.h.

The MAX77802 contains two 32.768khz clock outputs that can be controlled
(gated/ungated) over I2C. Clocks are defined as preprocessor macros in
dt-bindings/clock/maxim,max77802.h.

The MAX77686 contains one 32.768khz clock outputs that can be controlled
(gated/ungated) over I2C. Clocks are defined as preprocessor macros in
dt-bindings/clock/maxim,max77620.h.

Following properties should be presend in main device node of the MFD chip.

Required properties:

• #clock-cells: from common clock binding; shall be set to 1.

Optional properties:

• clock-output-names: From common clock binding.

Each clock is assigned an identifier and client nodes can use this identifier
to specify the clock which they consume. Following indices are allowed:
- 0: 32khz_ap clock (max77686, max77802), 32khz_out0 (max77620)
- 1: 32khz_cp clock (max77686, max77802),
- 2: 32khz_pmic clock (max77686).

Clocks are defined as preprocessor macros in above dt-binding header for
respective chips.

Example:

1. With MAX77686:

#include <dt-bindings/clock/maxim,max77686.h>
/* … */

Node of the MFD chip
    max77686: max77686@9 {
        compatible = "maxim,max77686";
        interrupt-parent = <&wakeup_eint>;
        interrupts = <26 0>;
        reg = <0x09>;
        #clock-cells = <1>;

        /* ... */
    };

Clock consumer node

    foo@0 {
        compatible = "bar,foo";
        /* ... */
        clock-names = "my-clock";
        clocks = <&max77686 MAX77686_CLK_PMIC>;
    };

2. With MAX77802:

#include <dt-bindings/clock/maxim,max77802.h>
/* … */

Node of the MFD chip
    max77802: max77802@9 {
        compatible = "maxim,max77802";
        interrupt-parent = <&wakeup_eint>;
        interrupts = <26 0>;
        reg = <0x09>;
        #clock-cells = <1>;

        /* ... */
    };

Clock consumer node

    foo@0 {
        compatible = "bar,foo";
        /* ... */
        clock-names = "my-clock";
        clocks = <&max77802 MAX77802_CLK_32K_AP>;
    };

3. With MAX77620:

#include <dt-bindings/clock/maxim,max77620.h>
/* … */

Node of the MFD chip
    max77620: max77620@3c {
        compatible = "maxim,max77620";
        reg = <0x3c>;
        #clock-cells = <1>;
        /* ... */
    };

Clock consumer node

    foo@0 {
        compatible = "bar,foo";
        /* ... */
        clock-names = "my-clock";
        clocks = <&max77620 MAX77620_CLK_32K_OUT0>;
    };