161 lines
4.6 KiB
Plaintext
161 lines
4.6 KiB
Plaintext
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Qualcomm Technologies, Inc. RPMh Regulators
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rpmh-regulator devices support PMIC regulator management via the Voltage
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Regulator Manager (VRM) and Oscillator Buffer (XOB) RPMh accelerators. The APPS
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processor communicates with these hardware blocks via a Resource State
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Coordinator (RSC) using command packets. The VRM allows changing three
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parameters for a given regulator: enable state, output voltage, and operating
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mode. The XOB allows changing only a single parameter for a given regulator:
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its enable state. Despite its name, the XOB is capable of controlling the
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enable state of any PMIC peripheral. It is used for clock buffers, low-voltage
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switches, and LDO/SMPS regulators which have a fixed voltage and mode.
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=======================
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Required Node Structure
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=======================
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RPMh regulators must be described in two levels of device nodes. The first
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level describes the PMIC containing the regulators and must reside within an
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RPMh device node. The second level describes each regulator within the PMIC
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which is to be used on the board. Each of these regulators maps to a single
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RPMh resource.
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The names used for regulator nodes must match those supported by a given PMIC.
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Supported regulator node names:
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PM8998: smps1 - smps13, ldo1 - ldo28, lvs1 - lvs2
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PMI8998: bob
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PM8005: smps1 - smps4
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========================
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First Level Nodes - PMIC
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========================
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- compatible
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Usage: required
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Value type: <string>
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Definition: Must be one of: "qcom,pm8998-rpmh-regulators",
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"qcom,pmi8998-rpmh-regulators" or
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"qcom,pm8005-rpmh-regulators".
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- qcom,pmic-id
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Usage: required
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Value type: <string>
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Definition: RPMh resource name suffix used for the regulators found on
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this PMIC. Typical values: "a", "b", "c", "d", "e", "f".
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- vdd-s1-supply
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- vdd-s2-supply
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- vdd-s3-supply
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- vdd-s4-supply
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Usage: optional (PM8998 and PM8005 only)
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Value type: <phandle>
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Definition: phandle of the parent supply regulator of one or more of the
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regulators for this PMIC.
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- vdd-s5-supply
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- vdd-s6-supply
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- vdd-s7-supply
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- vdd-s8-supply
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- vdd-s9-supply
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- vdd-s10-supply
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- vdd-s11-supply
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- vdd-s12-supply
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- vdd-s13-supply
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- vdd-l1-l27-supply
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- vdd-l2-l8-l17-supply
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- vdd-l3-l11-supply
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- vdd-l4-l5-supply
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- vdd-l6-supply
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- vdd-l7-l12-l14-l15-supply
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- vdd-l9-supply
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- vdd-l10-l23-l25-supply
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- vdd-l13-l19-l21-supply
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- vdd-l16-l28-supply
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- vdd-l18-l22-supply
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- vdd-l20-l24-supply
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- vdd-l26-supply
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- vin-lvs-1-2-supply
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Usage: optional (PM8998 only)
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Value type: <phandle>
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Definition: phandle of the parent supply regulator of one or more of the
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regulators for this PMIC.
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- vdd-bob-supply
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Usage: optional (PMI8998 only)
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Value type: <phandle>
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Definition: BOB regulator parent supply phandle
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===============================
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Second Level Nodes - Regulators
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===============================
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- qcom,always-wait-for-ack
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Usage: optional
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Value type: <empty>
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Definition: Boolean flag which indicates that the application processor
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must wait for an ACK or a NACK from RPMh for every request
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sent for this regulator including those which are for a
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strictly lower power state.
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Other properties defined in Documentation/devicetree/bindings/regulator.txt
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may also be used. regulator-initial-mode and regulator-allowed-modes may be
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specified for VRM regulators using mode values from
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include/dt-bindings/regulator/qcom,rpmh-regulator.h. regulator-allow-bypass
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may be specified for BOB type regulators managed via VRM.
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regulator-allow-set-load may be specified for LDO type regulators managed via
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VRM.
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========
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Examples
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========
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#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
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&apps_rsc {
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pm8998-rpmh-regulators {
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compatible = "qcom,pm8998-rpmh-regulators";
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qcom,pmic-id = "a";
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vdd-l7-l12-l14-l15-supply = <&pm8998_s5>;
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smps2 {
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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};
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pm8998_s5: smps5 {
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regulator-min-microvolt = <1904000>;
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regulator-max-microvolt = <2040000>;
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};
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ldo7 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
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regulator-allowed-modes =
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<RPMH_REGULATOR_MODE_LPM
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RPMH_REGULATOR_MODE_HPM>;
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regulator-allow-set-load;
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};
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lvs1 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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};
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};
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pmi8998-rpmh-regulators {
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compatible = "qcom,pmi8998-rpmh-regulators";
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qcom,pmic-id = "b";
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bob {
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regulator-min-microvolt = <3312000>;
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regulator-max-microvolt = <3600000>;
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regulator-allowed-modes =
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<RPMH_REGULATOR_MODE_AUTO
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RPMH_REGULATOR_MODE_HPM>;
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regulator-initial-mode = <RPMH_REGULATOR_MODE_AUTO>;
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};
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};
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};
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