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 ram - interrupts: Usage: required Value type: Definition: three entries specifying the RPM's: 1. acknowledgement interrupt 2. error interrupt 3. wakeup interrupt - interrupt-names: Usage: required Value type: Definition: must be the three strings "ack", "err" and "wakeup", in order - qcom,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, 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: 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: 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: 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: Definition: enable pull down of the regulator when inactive - 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 - qcom,force-mode: Usage: optional (default if no other qcom,force-mode is specified) Value type: 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: 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: Definition: enable pull down of the regulator when inactive - qcom,force-mode: Usage: optional Value type: 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: 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 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 = ; }; }; };