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Qualcomm Technologies Inc. SPM Regulators
spm-regulator is a regulator device which supports PMIC processor supply
regulators via the SPM module.
Required properties:
- compatible: Must be "qcom,spm-regulator"
- reg: Specifies the SPMI address and size for this regulator device
- regulator-name: A string used as a descriptive name for the regulator
Required structure:
- A qcom,spm-regulator node must be a child of an SPMI node that has specified
the spmi-slave-container property
Optional properties:
- qcom,mode: A string which specifies the mode to use for the regulator.
Supported values are "pwm" and "auto". PWM mode is more
robust, but draws more current than auto mode. If this
property is not specified, then the regulator will remain
in whatever mode hardware or bootloaders set it to.
- qcom,cpu-num: Specifies which CPU this regulator powers. This property is
not need when the SPM regulator is shared between all CPUs.
- qcom,bypass-spm: Boolean flag which indicates that voltage control should not
be managed by an SPM. Instead, the voltage should be
controlled via SPMI.
- qcom,max-voltage-step: Maximum single voltage step size in microvolts.
- qcom,recal-mask: Bit mask of the APSS clusters to recalibrate after each
voltage change. Bit 0 corresponds to the first cluster,
bit 1 corresponds to the second cluster, and so on.
Optional structure:
- A child node may be specified within a qcom,spm-regulator node which defines
an additional regulator which controls the AVS minimum and maximum
voltage limits.
- The AVS child node must contain these properties defined in regulator.txt:
regulator-name, regulator-min-microvolt, regulator-max-microvolt.
All properties specified within the core regulator framework can also be used.
These bindings can be found in regulator.txt.
Example:
qcom,spmi@fc4c0000 {
qcom,pm8226@1 {
spmi-slave-container;
spm-regulator@1700 {
compatible = "qcom,spm-regulator";
regulator-name = "8226_s2";
reg = <0x1700 0x100>;
regulator-min-microvolt = <900000>;
regulator-max-microvolt = <1275000>;
avs-limit-regulator {
regulator-name = "8226_s2_avs_limit";
regulator-min-microvolt = <900000>;
regulator-max-microvolt = <1275000>;
}
};
};
};
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