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Like most clock drivers, the Maxim 77686 PMIC clock binding follows the convention that the "#clock-cells" property is used to specify the number of cells in a clock provider. But the binding document is not clear enough that it shall be set to 1 since the PMIC support multiple clocks outputs. Also, explain that the clocks identifiers are defined in a header file that can be included by Device Tree source with client nodes to avoid using magic numbers. Finally, add "clock-output-names" as an optional property since now is supported by the clock driver. Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Doug Anderson <dianders@chromium.org> Reviewed-by: Mike Turquette <mturquette@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
47 lines
1.2 KiB
Plaintext
47 lines
1.2 KiB
Plaintext
Binding for Maxim MAX77686 32k clock generator block
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This is a part of device tree bindings of MAX77686 multi-function device.
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More information can be found in bindings/mfd/max77686.txt file.
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The MAX77686 contains three 32.768khz clock outputs that can be controlled
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(gated/ungated) over I2C.
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Following properties should be presend in main device node of the MFD chip.
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Required properties:
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- #clock-cells: from common clock binding; shall be set to 1.
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Optional properties:
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- clock-output-names: From common clock binding.
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Each clock is assigned an identifier and client nodes can use this identifier
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to specify the clock which they consume. Following indices are allowed:
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- 0: 32khz_ap clock,
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- 1: 32khz_cp clock,
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- 2: 32khz_pmic clock.
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Clocks are defined as preprocessor macros in dt-bindings/clock/maxim,max77686.h
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header and can be used in device tree sources.
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Example: Node of the MFD chip
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max77686: max77686@09 {
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compatible = "maxim,max77686";
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interrupt-parent = <&wakeup_eint>;
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interrupts = <26 0>;
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reg = <0x09>;
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#clock-cells = <1>;
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/* ... */
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};
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Example: Clock consumer node
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foo@0 {
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compatible = "bar,foo";
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/* ... */
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clock-names = "my-clock";
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clocks = <&max77686 MAX77686_CLK_PMIC>;
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};
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