280 lines
7.4 KiB
Plaintext
280 lines
7.4 KiB
Plaintext
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Qualcomm Resource Power Manager (RPM)
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This driver is used to interface with the Resource Power Manager (RPM) found in
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various Qualcomm platforms. The RPM allows each component in the system to vote
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for state of the system resources, such as clocks, regulators and bus
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frequencies.
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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:
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"qcom,rpm-apq8064"
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"qcom,rpm-msm8660"
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"qcom,rpm-msm8960"
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"qcom,rpm-ipq8064"
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"qcom,rpm-mdm9615"
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- reg:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: base address and size of the RPM's message ram
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- interrupts:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: three entries specifying the RPM's:
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1. acknowledgement interrupt
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2. error interrupt
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3. wakeup interrupt
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- interrupt-names:
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Usage: required
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Value type: <string-array>
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Definition: must be the three strings "ack", "err" and "wakeup", in order
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- qcom,ipc:
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Usage: required
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Value type: <prop-encoded-array>
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Definition: three entries specifying the outgoing ipc bit used for
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signaling the RPM:
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- phandle to a syscon node representing the apcs registers
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- u32 representing offset to the register within the syscon
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- u32 representing the ipc bit within the register
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= SUBNODES
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The RPM exposes resources to its subnodes. The below bindings specify the set
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of valid subnodes that can operate on these resources.
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== Regulators
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Regulator nodes are identified by their compatible:
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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:
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"qcom,rpm-pm8058-regulators"
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"qcom,rpm-pm8901-regulators"
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"qcom,rpm-pm8921-regulators"
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"qcom,rpm-pm8018-regulators"
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- vdd_l0_l1_lvs-supply:
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- vdd_l2_l11_l12-supply:
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- vdd_l3_l4_l5-supply:
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- vdd_l6_l7-supply:
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- vdd_l8-supply:
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- vdd_l9-supply:
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- vdd_l10-supply:
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- vdd_l13_l16-supply:
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- vdd_l14_l15-supply:
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- vdd_l17_l18-supply:
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- vdd_l19_l20-supply:
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- vdd_l21-supply:
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- vdd_l22-supply:
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- vdd_l23_l24_l25-supply:
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- vdd_ncp-supply:
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- vdd_s0-supply:
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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 (pm8058 only)
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Value type: <phandle>
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Definition: reference to regulator supplying the input pin, as
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described in the data sheet
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- lvs0_in-supply:
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- lvs1_in-supply:
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- lvs2_in-supply:
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- lvs3_in-supply:
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- mvs_in-supply:
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- vdd_l0-supply:
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- vdd_l1-supply:
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- vdd_l2-supply:
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- vdd_l3-supply:
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- vdd_l4-supply:
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- vdd_l5-supply:
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- vdd_l6-supply:
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- vdd_s0-supply:
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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 (pm8901 only)
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Value type: <phandle>
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Definition: reference to regulator supplying the input pin, as
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described in the data sheet
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- vdd_l1_l2_l12_l18-supply:
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- vdd_l3_l15_l17-supply:
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- vdd_l4_l14-supply:
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- vdd_l5_l8_l16-supply:
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- vdd_l6_l7-supply:
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- vdd_l9_l11-supply:
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- vdd_l10_l22-supply:
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- vdd_l21_l23_l29-supply:
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- vdd_l24-supply:
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- vdd_l25-supply:
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- vdd_l26-supply:
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- vdd_l27-supply:
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- vdd_l28-supply:
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- vdd_ncp-supply:
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- vdd_s1-supply:
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- vdd_s2-supply:
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- vdd_s4-supply:
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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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- vin_5vs-supply:
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- vin_lvs1_3_6-supply:
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- vin_lvs2-supply:
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- vin_lvs4_5_7-supply:
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Usage: optional (pm8921 only)
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Value type: <phandle>
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Definition: reference to regulator supplying the input pin, as
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described in the data sheet
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- vin_lvs1-supply:
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- vdd_l7-supply:
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- vdd_l8-supply:
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- vdd_l9_l10_l11_l12-supply:
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Usage: optional (pm8018 only)
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Value type: <phandle>
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Definition: reference to regulator supplying the input pin, as
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described in the data sheet
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The regulator node houses sub-nodes for each regulator within the device. Each
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sub-node is identified using the node's name, with valid values listed for each
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of the pmics below.
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pm8058:
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l0, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, l14, l15,
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l16, l17, l18, l19, l20, l21, l22, l23, l24, l25, s0, s1, s2, s3, s4,
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lvs0, lvs1, ncp
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pm8901:
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l0, l1, l2, l3, l4, l5, l6, s0, s1, s2, s3, s4, lvs0, lvs1, lvs2, lvs3,
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mvs
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pm8921:
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s1, s2, s3, s4, s7, s8, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
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l12, l14, l15, l16, l17, l18, l21, l22, l23, l24, l25, l26, l27, l28,
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l29, lvs1, lvs2, lvs3, lvs4, lvs5, lvs6, lvs7, usb-switch, hdmi-switch,
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ncp
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pm8018:
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s1, s2, s3, s4, s5, , l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
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l12, l14, lvs1
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The content of each sub-node is defined by the standard binding for regulators -
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see regulator.txt - with additional custom properties described below:
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=== Switch-mode Power Supply regulator custom properties
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- bias-pull-down:
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Usage: optional
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Value type: <empty>
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Definition: enable pull down of the regulator when inactive
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- qcom,switch-mode-frequency:
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Usage: required
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Value type: <u32>
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Definition: Frequency (Hz) of the switch-mode power supply;
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must be one of:
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19200000, 9600000, 6400000, 4800000, 3840000, 3200000,
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2740000, 2400000, 2130000, 1920000, 1750000, 1600000,
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1480000, 1370000, 1280000, 1200000
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- qcom,force-mode:
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Usage: optional (default if no other qcom,force-mode is specified)
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Value type: <u32>
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Definition: indicates that the regulator should be forced to a
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particular mode, valid values are:
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QCOM_RPM_FORCE_MODE_NONE - do not force any mode
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QCOM_RPM_FORCE_MODE_LPM - force into low power mode
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QCOM_RPM_FORCE_MODE_HPM - force into high power mode
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QCOM_RPM_FORCE_MODE_AUTO - allow regulator to automatically
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select its own mode based on
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realtime current draw, only for:
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pm8921 smps and ftsmps
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- qcom,power-mode-hysteretic:
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Usage: optional
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Value type: <empty>
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Definition: select that the power supply should operate in hysteretic
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mode, instead of the default pwm mode
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=== Low-dropout regulator custom properties
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- bias-pull-down:
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Usage: optional
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Value type: <empty>
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Definition: enable pull down of the regulator when inactive
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- qcom,force-mode:
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Usage: optional
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Value type: <u32>
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Definition: indicates that the regulator should not be forced to any
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particular mode, valid values are:
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QCOM_RPM_FORCE_MODE_NONE - do not force any mode
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QCOM_RPM_FORCE_MODE_LPM - force into low power mode
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QCOM_RPM_FORCE_MODE_HPM - force into high power mode
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QCOM_RPM_FORCE_MODE_BYPASS - set regulator to use bypass
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mode, i.e. to act as a switch
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and not regulate, only for:
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pm8921 pldo, nldo and nldo1200
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=== Negative Charge Pump custom properties
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- qcom,switch-mode-frequency:
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Usage: required
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Value type: <u32>
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Definition: Frequency (Hz) of the switch mode power supply;
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must be one of:
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19200000, 9600000, 6400000, 4800000, 3840000, 3200000,
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2740000, 2400000, 2130000, 1920000, 1750000, 1600000,
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1480000, 1370000, 1280000, 1200000
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= EXAMPLE
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#include <dt-bindings/mfd/qcom-rpm.h>
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rpm@108000 {
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compatible = "qcom,rpm-msm8960";
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reg = <0x108000 0x1000>;
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qcom,ipc = <&apcs 0x8 2>;
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interrupts = <0 19 0>, <0 21 0>, <0 22 0>;
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interrupt-names = "ack", "err", "wakeup";
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regulators {
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compatible = "qcom,rpm-pm8921-regulators";
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vdd_l1_l2_l12_l18-supply = <&pm8921_s4>;
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s1 {
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regulator-min-microvolt = <1225000>;
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regulator-max-microvolt = <1225000>;
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bias-pull-down;
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qcom,switch-mode-frequency = <3200000>;
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};
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pm8921_s4: s4 {
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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qcom,switch-mode-frequency = <1600000>;
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bias-pull-down;
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qcom,force-mode = <QCOM_RPM_FORCE_MODE_AUTO>;
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};
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};
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};
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