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The Maxim MAX77686 PMIC is a multi-function device with regulators, clocks and a RTC. The DT bindings for the clocks are in a separate file but the bindings for the regulators are inside the mfd part. To make it consistent with the clocks portion of the binding and because is more natural to look for regulator bindings under the bindings/regulator sub-directory, split the regulator portion of the DT binding and add it as a separate file. Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
72 lines
2.2 KiB
Plaintext
72 lines
2.2 KiB
Plaintext
Binding for Maxim MAX77686 regulators
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This is a part of the device tree bindings of MAX77686 multi-function device.
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More information can be found in ../mfd/max77686.txt file.
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The MAX77686 PMIC has 9 high-efficiency Buck and 26 Low-DropOut (LDO)
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regulators that can be controlled over I2C.
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Following properties should be present in main device node of the MFD chip.
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Optional node:
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- voltage-regulators : The regulators of max77686 have to be instantiated
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under subnode named "voltage-regulators" using the following format.
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regulator_name {
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regulator-compatible = LDOn/BUCKn
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standard regulator constraints....
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};
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refer Documentation/devicetree/bindings/regulator/regulator.txt
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The regulator node's name should be initialized with a string
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to get matched with their hardware counterparts as follow:
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-LDOn : for LDOs, where n can lie in range 1 to 26.
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example: LDO1, LDO2, LDO26.
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-BUCKn : for BUCKs, where n can lie in range 1 to 9.
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example: BUCK1, BUCK5, BUCK9.
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Regulators which can be turned off during system suspend:
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-LDOn : 2, 6-8, 10-12, 14-16,
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-BUCKn : 1-4.
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Use standard regulator bindings for it ('regulator-off-in-suspend').
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LDO20, LDO21, LDO22, BUCK8 and BUCK9 can be configured to GPIO enable
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control. To turn this feature on this property must be added to the regulator
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sub-node:
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- maxim,ena-gpios : one GPIO specifier enable control (the gpio
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flags are actually ignored and always
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ACTIVE_HIGH is used)
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Example:
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max77686: pmic@09 {
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compatible = "maxim,max77686";
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interrupt-parent = <&wakeup_eint>;
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interrupts = <26 IRQ_TYPE_NONE>;
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reg = <0x09>;
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voltage-regulators {
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ldo11_reg: LDO11 {
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regulator-name = "vdd_ldo11";
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regulator-min-microvolt = <1900000>;
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regulator-max-microvolt = <1900000>;
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regulator-always-on;
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};
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buck1_reg: BUCK1 {
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regulator-name = "vdd_mif";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1300000>;
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regulator-always-on;
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regulator-boot-on;
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};
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buck9_reg: BUCK9 {
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regulator-name = "CAM_ISP_CORE_1.2V";
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regulator-min-microvolt = <1000000>;
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regulator-max-microvolt = <1200000>;
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maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>;
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};
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};
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