Qualcomm Resource Power Manager (RPM)
This driver is used to interface with the Resource Power Manager (RPM) found in
various Qualcomm platforms. The RPM allows each component in the system to vote
for state of the system resources, such as clocks, regulators and bus
frequencies.
compatible:
Usage: required
Value type:
Definition: must be one of:"qcom,rpm-apq8064" "qcom,rpm-msm8660" "qcom,rpm-msm8960" "qcom,rpm-ipq8064" "qcom,rpm-mdm9615"reg:
Usage: required
Value type:
Definition: base address and size of the RPM’s message raminterrupts:
Usage: required
Value type:
Definition: three entries specifying the RPM’s:1. acknowledgement interrupt 2. error interrupt 3. wakeup interruptinterrupt-names:
Usage: required
Value type:
Definition: must be the three strings “ack”, “err” and “wakeup”, in orderqcom,ipc:
Usage: required
Value type:Definition: three entries specifying the outgoing ipc bit used for
signaling the RPM: - phandle to a syscon node representing the apcs registers - u32 representing offset to the register within the syscon - u32 representing the ipc bit within the register
= SUBNODES
The RPM exposes resources to its subnodes. The below bindings specify the set
of valid subnodes that can operate on these resources.
== Regulators
Regulator nodes are identified by their compatible:
compatible:
Usage: required
Value type:
Definition: must be one of:"qcom,rpm-pm8058-regulators" "qcom,rpm-pm8901-regulators" "qcom,rpm-pm8921-regulators" "qcom,rpm-pm8018-regulators"vdd_l0_l1_lvs-supply:
vdd_l2_l11_l12-supply:
vdd_l3_l4_l5-supply:
vdd_l6_l7-supply:
vdd_l8-supply:
vdd_l9-supply:
vdd_l10-supply:
vdd_l13_l16-supply:
vdd_l14_l15-supply:
vdd_l17_l18-supply:
vdd_l19_l20-supply:
vdd_l21-supply:
vdd_l22-supply:
vdd_l23_l24_l25-supply:
vdd_ncp-supply:
vdd_s0-supply:
vdd_s1-supply:
vdd_s2-supply:
vdd_s3-supply:
vdd_s4-supply:
Usage: optional (pm8058 only)
Value type:
Definition: reference to regulator supplying the input pin, asdescribed in the data sheetlvs0_in-supply:
lvs1_in-supply:
lvs2_in-supply:
lvs3_in-supply:
mvs_in-supply:
vdd_l0-supply:
vdd_l1-supply:
vdd_l2-supply:
vdd_l3-supply:
vdd_l4-supply:
vdd_l5-supply:
vdd_l6-supply:
vdd_s0-supply:
vdd_s1-supply:
vdd_s2-supply:
vdd_s3-supply:
vdd_s4-supply:
Usage: optional (pm8901 only)
Value type:
Definition: reference to regulator supplying the input pin, asdescribed in the data sheetvdd_l1_l2_l12_l18-supply:
vdd_l3_l15_l17-supply:
vdd_l4_l14-supply:
vdd_l5_l8_l16-supply:
vdd_l6_l7-supply:
vdd_l9_l11-supply:
vdd_l10_l22-supply:
vdd_l21_l23_l29-supply:
vdd_l24-supply:
vdd_l25-supply:
vdd_l26-supply:
vdd_l27-supply:
vdd_l28-supply:
vdd_ncp-supply:
vdd_s1-supply:
vdd_s2-supply:
vdd_s4-supply:
vdd_s5-supply:
vdd_s6-supply:
vdd_s7-supply:
vdd_s8-supply:
vin_5vs-supply:
vin_lvs1_3_6-supply:
vin_lvs2-supply:
vin_lvs4_5_7-supply:
Usage: optional (pm8921 only)
Value type:
Definition: reference to regulator supplying the input pin, asdescribed in the data sheetvin_lvs1-supply:
vdd_l7-supply:
vdd_l8-supply:
vdd_l9_l10_l11_l12-supply:
Usage: optional (pm8018 only)
Value type:
Definition: reference to regulator supplying the input pin, asdescribed in the data sheet
The regulator node houses sub-nodes for each regulator within the device. Each
sub-node is identified using the node’s name, with valid values listed for each
of the pmics below.
pm8058:
l0, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, l14, l15,
l16, l17, l18, l19, l20, l21, l22, l23, l24, l25, s0, s1, s2, s3, s4,
lvs0, lvs1, ncp
pm8901:
l0, l1, l2, l3, l4, l5, l6, s0, s1, s2, s3, s4, lvs0, lvs1, lvs2, lvs3,
mvs
pm8921:
s1, s2, s3, s4, s7, s8, l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
l12, l14, l15, l16, l17, l18, l21, l22, l23, l24, l25, l26, l27, l28,
l29, lvs1, lvs2, lvs3, lvs4, lvs5, lvs6, lvs7, usb-switch, hdmi-switch,
ncp
pm8018:
s1, s2, s3, s4, s5, , l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11,
l12, l14, lvs1
The content of each sub-node is defined by the standard binding for regulators -
see regulator.txt - with additional custom properties described below:
=== Switch-mode Power Supply regulator custom properties
bias-pull-down:
Usage: optional
Value type:
Definition: enable pull down of the regulator when inactiveqcom,switch-mode-frequency:
Usage: required
Value type:
Definition: Frequency (Hz) of the switch-mode power supply;must be one of: 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000, 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000, 1280000, 1200000qcom,force-mode:
Usage: optional (default if no other qcom,force-mode is specified)
Value type:
Definition: indicates that the regulator should be forced to aparticular mode, valid values are: QCOM_RPM_FORCE_MODE_NONE - do not force any mode QCOM_RPM_FORCE_MODE_LPM - force into low power mode QCOM_RPM_FORCE_MODE_HPM - force into high power mode QCOM_RPM_FORCE_MODE_AUTO - allow regulator to automatically select its own mode based on realtime current draw, only for: pm8921 smps and ftsmpsqcom,power-mode-hysteretic:
Usage: optional
Value type:
Definition: select that the power supply should operate in hystereticmode, instead of the default pwm mode
=== Low-dropout regulator custom properties
bias-pull-down:
Usage: optional
Value type:
Definition: enable pull down of the regulator when inactiveqcom,force-mode:
Usage: optional
Value type:
Definition: indicates that the regulator should not be forced to anyparticular mode, valid values are: QCOM_RPM_FORCE_MODE_NONE - do not force any mode QCOM_RPM_FORCE_MODE_LPM - force into low power mode QCOM_RPM_FORCE_MODE_HPM - force into high power mode QCOM_RPM_FORCE_MODE_BYPASS - set regulator to use bypass mode, i.e. to act as a switch and not regulate, only for: pm8921 pldo, nldo and nldo1200
=== Negative Charge Pump custom properties
- qcom,switch-mode-frequency:
Usage: required
Value type:
Definition: Frequency (Hz) of the switch mode power supply;must be one of: 19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000, 2400000, 2130000, 1920000, 1750000, 1600000, 1480000, 1370000, 1280000, 1200000
= EXAMPLE
#include <dt-bindings/mfd/qcom-rpm.h>
rpm@108000 {
compatible = "qcom,rpm-msm8960";
reg = <0x108000 0x1000>;
qcom,ipc = <&apcs 0x8 2>;
interrupts = <0 19 0>, <0 21 0>, <0 22 0>;
interrupt-names = "ack", "err", "wakeup";
regulators {
compatible = "qcom,rpm-pm8921-regulators";
vdd_l1_l2_l12_l18-supply = <&pm8921_s4>;
s1 {
regulator-min-microvolt = <1225000>;
regulator-max-microvolt = <1225000>;
bias-pull-down;
qcom,switch-mode-frequency = <3200000>;
};
pm8921_s4: s4 {
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
qcom,switch-mode-frequency = <1600000>;
bias-pull-down;
qcom,force-mode = <QCOM_RPM_FORCE_MODE_AUTO>;
};
};
};
