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Commit a6c6ee7b authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge changes If3fe9e08,I81909845,Ib76c789c into msm-next 

* changes:
  regulator: rpmh-regulator: update ARC voltage level masking logic
  regulator: rpmh-regulator: add support for min dropout voltage
  regulator: add rpmh-regulator driver
parents 5b35418b f2367b70

Documentation/devicetree/bindings/regulator/rpmh-regulator.txt

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Qualcomm Technologies, Inc. RPMh Regulators



rpmh-regulator devices support PMIC regulator management via the VRM and ARC

RPMh accelerators.  The APPS processor communicates with these hardware blocks

via an RSC using command packets.  The VRM allows changing four parameters for

a given regulator: enable state, output voltage, operating mode, and minimum

headroom voltage.  The ARC allows changing only a single parameter for a given

regulator: its operating level.  This operating level is fed into CPR which then

decides upon a final explicit voltage for the regulator.



=======================

Required Node Structure

=======================



RPMh regulators must be described in two levels of device nodes.  The first

level describes the interface with RPMh (mailbox and resource).  The second

level describes properties of one regulator framework interface (of potentially

many) for the regulator resource.



==================================

First Level Nodes - RPMh Interface

==================================



- compatible

	Usage:      required

	Value type: <string>

	Definition: Must be "qcom,rpmh-vrm-regulator" or

		    "qcom,rpmh-arc-regulator" depending upon the hardware type,

		    VRM or ARC, of the RPMh managed regulator resource.



- mboxes

	Usage:      required

	Value type: <prop-encoded-array>

	Definition: RPMh mailbox phandle and channel indentifiers.  The channel

		    should always be 0.



- qcom,resource-name

	Usage:      required

	Value type: <string>

	Definition: RPMh resource name which encodes the the specific instance

		    of a given type of regulator (LDO, SMPS, VS, etc) within

		    a particular PMIC found in the system.  This name must match

		    to one that is defined by the bootloader.



- qcom,use-awake-state

	Usage:      optional

	Value type: <empty>

	Definition: Boolean flag indicating that active set requests should be

		    made using the awake state instead of the active-only state.

		    This should be used for RSC's which do not have an AMC.



- qcom,always-wait-for-ack

	Usage:      optional

	Value type: <empty>

	Definition: Boolean flag which indicates that the application processor

		    must wait for an ACK or a NACK from RPMh for every request

		    sent for this regulator including those which are for a

		    strictly lower power state.



- <regulator-name>-parent-supply

	Usage:      optional

	Value type: <phandle>

	Definition: phandle of the parent supply regulator of one of the

		    regulators for this RPMh resource.  The property name is

		    defined by the value specified for the regulator-name

		    property.



- qcom,supported-modes

	Usage:      optional; VRM regulators only

	Value type: <prop-encoded-array>

	Definition: A list of integers specifying the PMIC regulator modes

		    supported by this regulator.  Supported values are

		    RPMH_REGULATOR_MODE_* (i.e. 0 to 7).  Elements must be

		    specified in order from lowest to highest.



- qcom,mode-threshold-currents

	Usage:      required if qcom,supported-modes is specified

	Value type: <prop-encoded-array>

	Definition: A list of integers specifying minimum allowed current in

		    microamps for each of the modes listed in

		    qcom,supported-modes.  The first element should always be 0.

		    Elements must be specified in order from lowest to highest.



- qcom,send-defaults

	Usage:      optional

	Value type: <empty>

	Definition: Boolean flag which indicates that the initial parameter

		    values should be sent to RPMh before consumers make their

		    own requests.  If this flag is not specified, then initial

		    parameters values will only be sent after some consumer

		    makes a request.



=========================================

Second Level Nodes - Regulator Interfaces

=========================================



- regulator-name

	Usage:      required

	Value type: <string>

	Definition: Specifies the name for this RPMh regulator.



- regulator-min-microvolt

	Usage:      required

	Value type: <u32>

	Definition: For VRM resources, this is the minimum supported voltage in

		    microvolts.  For ARC resources, this is the minimum

		    supported voltage level from RPMH_REGULATOR_LEVEL_*.



- regulator-max-microvolt

	Usage:      required

	Value type: <u32>

	Definition: For VRM resources, this is the maximum supported voltage in

		    microvolts.  For ARC resources, this is the maximum

		    supported voltage level from RPMH_REGULATOR_LEVEL_*.



 - regulator-enable-ramp-delay

	Usage:      optional

	Value type: <u32>

	Definition: For VRM resources, the time in microseconds to delay after

		    enabling a regulator.



- qcom,set

	Usage:      required

	Value type: <u32>

	Definition: Specifies which sets that requests made with this regulator

		    interface should be sent to.  Regulator requests sent in the

		    active set take effect immediately.  Requests sent in the

		    sleep set take effect when the Apps processor transitions

		    into RPMh assisted power collapse.  Supported values are

		    one of RPMH_REGULATOR_SET_* (i.e. 1, 2, or 3).



- qcom,init-enable

	Usage:      optional; VRM regulators only

	Value type: <u32>

	Definition: Specifies the initial enable state to request for a VRM

		    regulator.  Supported values are 0 (regulator disabled) and

		    1 (regulator enabled).



- qcom,init-voltage

	Usage:      optional; VRM regulators only

	Value type: <u32>

	Definition: Specifies the initial voltage in microvolts to request for a

		    VRM regulator.  Supported values are 0 to 8191000.



- qcom,init-mode

	Usage:      optional; VRM regulators only

	Value type: <u32>

	Definition: Specifies the initial mode to request for a VRM regulator.

		    Supported values are RPMH_REGULATOR_MODE_* (i.e. 0 to 7).



- qcom,init-headroom-voltage

	Usage:      optional; VRM regulators only

	Value type: <u32>

	Definition: Specifies the initial headroom voltage in microvolts to

		    request for a VRM regulator.  RPMh ensures that the parent

		    of this regulator outputs a voltage high enough to satisfy

		    the requested headroom.  Supported values are 0 to 511000.



- qcom,init-voltage-level

	Usage:      optional; ARC regulators only

	Value type: <u32>

	Definition: Specifies the initial voltage level to request for an ARC

		    regulator.  Supported values are RPMH_REGULATOR_LEVEL_*

		    (i.e. 1 to ~513).



- qcom,min-dropout-voltage

	Usage:      optional; VRM regulators only

	Value type: <u32>

	Definition: Specifies the minimum voltage in microvolts that the parent

		    supply regulator must output above the output of this

		    regulator.  It is only meaningful if the property

		    <regulator-name>-parent-supply has been specified in the

		    first level node.



- qcom,min-dropout-voltage-level

	Usage:      optional; ARC regulators only

	Value type: <u32>

	Definition: Specifies the minimum voltage level difference that the

		    parent supply regulator must output above the output of this

		    regulator.  It is only meaningful if the property

		    <regulator-name>-parent-supply has been specified in the

		    first level node.



========

Examples

========



rpmh-regulator-cxlvl {

	compatible = "qcom,rpmh-arc-regulator";

	mboxes = <&apps_rsc 0>;

	qcom,resource-name = "cx.lvl";

	qcom,send-defaults;

	pm8998_s9_level: regulator-s9-level {

		regulator-name = "pm8998_s9_level";

		qcom,set = <RPMH_REGULATOR_SET_ALL>;

		regulator-min-microvolt = <RPMH_REGULATOR_LEVEL_OFF>;

		regulator-max-microvolt = <RPMH_REGULATOR_LEVEL_MAX>;

		qcom,init-voltage-level = <RPMH_REGULATOR_LEVEL_TURBO>;

	};



	pm8998_s9_level_ao: regulator-s9-level-ao {

		regulator-name = "pm8998_s9_level_ao";

		qcom,set = <RPMH_REGULATOR_SET_ACTIVE>;

		regulator-min-microvolt = <RPMH_REGULATOR_LEVEL_OFF>;

		regulator-max-microvolt = <RPMH_REGULATOR_LEVEL_MAX>;

	};

};



rpmh-regulator-smpa2 {

	compatible = "qcom,rpmh-vrm-regulator";

	mboxes = <&apps_rsc 0>;

	qcom,resource-name = "smpa2";

	qcom,supported-modes =

		<RPMH_REGULATOR_MODE_SMPS_AUTO

		 RPMH_REGULATOR_MODE_SMPS_PWM>;

	qcom,mode-threshold-currents = <0 2000000>;

	pm8998_s2: regulator-s2 {

		regulator-name = "pm8998_s2";

		qcom,set = <RPMH_REGULATOR_SET_ALL>;

		regulator-min-microvolt = <1100000>;

		regulator-max-microvolt = <1200000>;

		regulator-enable-ramp-delay = <200>;

		qcom,init-mode = <RPMH_REGULATOR_MODE_SMPS_AUTO>;

		qcom,init-voltage = <1150000>;

	};

};



rpmh-regulator-ldoa3-disp {

	compatible = "qcom,rpmh-vrm-regulator";

	mboxes = <&disp_rsc 0>;

	qcom,use-awake-state;

	qcom,resource-name = "ldoa3";

	qcom,supported-modes =

		<RPMH_REGULATOR_MODE_LDO_LPM

		 RPMH_REGULATOR_MODE_LDO_HPM>;

	qcom,mode-threshold-currents = <0 10000>;

	qcom,always-wait-for-ack;

	pm8998_l3_disp_ao: regulator-l3-ao {

		regulator-name = "pm8998_l3_disp_ao";

		qcom,set = <RPMH_REGULATOR_SET_ACTIVE>;

		regulator-min-microvolt = <1000000>;

		regulator-max-microvolt = <1200000>;

		qcom,init-voltage = <1000000>;

		qcom,init-headroom-voltage = <60000>;

	};

	pm8998_l3_disp_so: regulator-l3-so {

		regulator-name = "pm8998_l3_disp_so";

		qcom,set = <RPMH_REGULATOR_SET_SLEEP>;

		regulator-min-microvolt = <1000000>;

		regulator-max-microvolt = <1200000>;

		qcom,init-mode = <RPMH_REGULATOR_MODE_LDO_LPM>;

		qcom,init-voltage = <1000000>;

		qcom,init-enable = <0>;

	};

};



rpmh-regulator-ldoa4 {

	compatible = "qcom,rpmh-vrm-regulator";

	mboxes = <&apps_rsc 0>;

	qcom,resource-name = "ldoa4";

	pm8998_l4-parent-supply = <&pm8998_s2>;

	pm8998_l4: regulator-l4 {

		regulator-name = "pm8998_l4";

		qcom,set = <RPMH_REGULATOR_SET_ALL>;

		regulator-min-microvolt = <1000000>;

		regulator-max-microvolt = <1000000>;

		qcom,init-voltage = <1000000>;

	};

};

drivers/regulator/Kconfig

+10 −0
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@@ -937,6 +937,16 @@ config REGULATOR_WM8994 
	  This driver provides support for the voltage regulators on the

	  WM8994 CODEC.



config REGULATOR_RPMH

	tristate "Qualcomm Technologies, Inc. RPMh regulator driver"

	depends on OF

	depends on QTI_RPMH_API

	help

	  This driver supports control of PMIC regulators via the RPMh hardware

	  block found on Qualcomm Technologies Inc. SoCs.  RPMh regulator

	  control allows for voting on regulator state between multiple

	  processors within the SoC.



config REGULATOR_STUB

	tristate "Stub Regulator"

	help

drivers/regulator/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -119,7 +119,7 @@ obj-$(CONFIG_REGULATOR_WM831X) += wm831x-ldo.o 
obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o

obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o

obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o



obj-$(CONFIG_REGULATOR_RPMH) += rpmh-regulator.o

obj-$(CONFIG_REGULATOR_STUB) += stub-regulator.o



ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG