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