forked from Minki/linux
80 lines
2.2 KiB
Plaintext
80 lines
2.2 KiB
Plaintext
|
Binding for Samsung S2MPA01 regulator block
|
||
|
|
===========================================
|
||
|
|
|
||
|
|
This is a part of device tree bindings for S2M family multi-function devices.
|
||
|
|
More information can be found in bindings/mfd/sec-core.txt file.
|
||
|
|
|
||
|
|
The S2MPA01 device provide buck and LDO regulators.
|
||
|
|
|
||
|
|
To register these with regulator framework instantiate under main device node
|
||
|
|
a sub-node named "regulators" with more sub-nodes for each regulator using the
|
||
|
|
common regulator binding documented in:
|
||
|
|
- Documentation/devicetree/bindings/regulator/regulator.txt
|
||
|
|
|
||
|
|
|
||
|
|
Names of regulators supported by S2MPA01 device:
|
||
|
|
- LDOn
|
||
|
|
- valid values for n are 1 to 26
|
||
|
|
- Example: LDO1, LD02, LDO26
|
||
|
|
- BUCKn
|
||
|
|
- valid values for n are 1 to 10.
|
||
|
|
- Example: BUCK1, BUCK2, BUCK9
|
||
|
|
Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
|
||
|
|
as per the datasheet of device.
|
||
|
|
|
||
|
|
|
||
|
|
Optional properties of buck regulator nodes under "regulators" sub-node:
|
||
|
|
- regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500
|
||
|
|
(default), 25000, or 50000. May be 0 for disabling the ramp delay on
|
||
|
|
BUCK{1,2,3,4}.
|
||
|
|
|
||
|
|
In the absence of the regulator-ramp-delay property, the default ramp
|
||
|
|
delay will be used.
|
||
|
|
|
||
|
|
Note: Some bucks share the ramp rate setting i.e. same ramp value
|
||
|
|
will be set for a particular group of bucks so provide the same
|
||
|
|
regulator-ramp-delay value for them.
|
||
|
|
Groups sharing ramp rate:
|
||
|
|
- buck{1,6},
|
||
|
|
- buck{2,4},
|
||
|
|
- buck{8,9,10}.
|
||
|
|
|
||
|
|
Example:
|
||
|
|
|
||
|
|
s2mpa01_pmic@66 {
|
||
|
|
compatible = "samsung,s2mpa01-pmic";
|
||
|
|
reg = <0x66>;
|
||
|
|
|
||
|
|
regulators {
|
||
|
|
ldo1_reg: LDO1 {
|
||
|
|
regulator-name = "VDD_ALIVE";
|
||
|
|
regulator-min-microvolt = <1000000>;
|
||
|
|
regulator-max-microvolt = <1000000>;
|
||
|
|
};
|
||
|
|
|
||
|
|
ldo2_reg: LDO2 {
|
||
|
|
regulator-name = "VDDQ_MMC2";
|
||
|
|
regulator-min-microvolt = <2800000>;
|
||
|
|
regulator-max-microvolt = <2800000>;
|
||
|
|
regulator-always-on;
|
||
|
|
};
|
||
|
|
|
||
|
|
buck1_reg: BUCK1 {
|
||
|
|
regulator-name = "vdd_mif";
|
||
|
|
regulator-min-microvolt = <950000>;
|
||
|
|
regulator-max-microvolt = <1350000>;
|
||
|
|
regulator-always-on;
|
||
|
|
regulator-boot-on;
|
||
|
|
};
|
||
|
|
|
||
|
|
buck2_reg: BUCK2 {
|
||
|
|
regulator-name = "vdd_arm";
|
||
|
|
regulator-min-microvolt = <950000>;
|
||
|
|
regulator-max-microvolt = <1350000>;
|
||
|
|
regulator-always-on;
|
||
|
|
regulator-boot-on;
|
||
|
|
regulator-ramp-delay = <50000>;
|
||
|
|
};
|
||
|
|
};
|
||
|
|
};
|