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regulator: Add Spreadtrum SC2731 regulator documentation 

This patch adds support for the Spreadtrum SC2731
voltage regulator device.

Signed-off-by: Erick Chen <erick.chen@spreadtrum.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
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Erick Chen 2017-12-05 14:35:45 +08:00 committed by Mark Brown
parent 4fbd8d194f
commit 5149b685b1
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Documentation/devicetree/bindings/regulator/sprd,sc2731-regulator.txt Normal file
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Spreadtrum SC2731 Voltage regulators
The SC2731 integrates low-voltage and low quiescent current DCDC/LDO.
14 LDO and 3 DCDCs are designed for external use. All DCDCs/LDOs have
their own bypass (power-down) control signals. External tantalum or MLCC
ceramic capacitors are recommended to use with these LDOs.
Required properties:
- compatible: should be "sprd,sc27xx-regulator".
List of regulators provided by this controller. It is named according to
its regulator type, BUCK_<name> and LDO_<name>. The definition for each
of these nodes is defined using the standard binding for regulators at
Documentation/devicetree/bindings/regulator/regulator.txt.
The valid names for regulators are:
BUCK:
BUCK_CPU0, BUCK_CPU1, BUCK_RF
LDO:
LDO_CAMA0, LDO_CAMA1, LDO_CAMMOT, LDO_VLDO, LDO_EMMCCORE, LDO_SDCORE,
LDO_SDIO, LDO_WIFIPA, LDO_USB33, LDO_CAMD0, LDO_CAMD1, LDO_CON,
LDO_CAMIO, LDO_SRAM
Example:
regulators {
compatible = "sprd,sc27xx-regulator";
vddarm0: BUCK_CPU0 {
regulator-name = "vddarm0";
regulator-min-microvolt = <400000>;
regulator-max-microvolt = <1996875>;
regulator-ramp-delay = <25000>;
regulator-always-on;
};
vddcama0: LDO_CAMA0 {
regulator-name = "vddcama0";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <3750000>;
regulator-enable-ramp-delay = <100>;
};
...
};