| 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: <string> |
| 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: <prop-encoded-array> |
| Definition: base address and size of the RPM's message ram |
| |
| - interrupts: |
| Usage: required |
| Value type: <prop-encoded-array> |
| Definition: three entries specifying the RPM's: |
| 1. acknowledgement interrupt |
| 2. error interrupt |
| 3. wakeup interrupt |
| |
| - interrupt-names: |
| Usage: required |
| Value type: <string-array> |
| Definition: must be the three strings "ack", "err" and "wakeup", in order |
| |
| - qcom,ipc: |
| Usage: required |
| Value type: <prop-encoded-array> |
| |
| 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: <string> |
| 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: <phandle> |
| Definition: reference to regulator supplying the input pin, as |
| described in the data sheet |
| |
| - lvs0_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: <phandle> |
| Definition: reference to regulator supplying the input pin, as |
| described in the data sheet |
| |
| - vdd_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: <phandle> |
| Definition: reference to regulator supplying the input pin, as |
| described in the data sheet |
| |
| - vin_lvs1-supply: |
| - vdd_l7-supply: |
| - vdd_l8-supply: |
| - vdd_l9_l10_l11_l12-supply: |
| Usage: optional (pm8018 only) |
| Value type: <phandle> |
| Definition: reference to regulator supplying the input pin, as |
| described 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: <empty> |
| Definition: enable pull down of the regulator when inactive |
| |
| - qcom,switch-mode-frequency: |
| Usage: required |
| Value type: <u32> |
| 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 |
| |
| - qcom,force-mode: |
| Usage: optional (default if no other qcom,force-mode is specified) |
| Value type: <u32> |
| Definition: indicates that the regulator should be forced to a |
| particular 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 ftsmps |
| |
| - qcom,power-mode-hysteretic: |
| Usage: optional |
| Value type: <empty> |
| Definition: select that the power supply should operate in hysteretic |
| mode, instead of the default pwm mode |
| |
| === Low-dropout regulator custom properties |
| |
| - bias-pull-down: |
| Usage: optional |
| Value type: <empty> |
| Definition: enable pull down of the regulator when inactive |
| |
| - qcom,force-mode: |
| Usage: optional |
| Value type: <u32> |
| Definition: indicates that the regulator should not be forced to any |
| particular 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: <u32> |
| 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>; |
| }; |
| }; |
| }; |
| |
