Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit e3299424 authored by David Collins's avatar David Collins
Browse files

dt-bindings: regulator: add rpmh-regulator bindings 



Add rpmh-regulator device bindings for PMIC regulator management
via the RPMh hardware block on Qualcomm Technologies, Inc. SoCs.

This is a snapshot commit of msm-4.14 as of:
commit 2913cfe3 ("Merge "iommu: arm-smmu: wait for writes to
complete before power off"").  Some modifications have been made
to handle rpmh device binding differences between msm-4.14 and
msm-4.19.

Change-Id: I466cfea65acc11fd54c3b292c4d21cbac6f9cf40
Signed-off-by: default avatarDavid Collins <collinsd@codeaurora.org>
parent 2a82b470

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

0 → 100644
+285 −0
Original line number Diff line number Diff line 
Qualcomm Technologies, Inc. RPMh Regulators



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

XOB 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.  The XOB

allows changing only a single parameter for a given regulator: its enable state.



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

Required Node Structure

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



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

level describes the interface with RPMh (resource) and must reside within an

RPMh device node.  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", "qcom,rpmh-arc-regulator"

		    or "qcom,rpmh-xob-regulator" depending upon the hardware

		    type, VRM, ARC or XOB, of the RPMh managed regulator

		    resource.



- 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,regulator-type

	Usage:      required if qcom,supported-modes is specified or if

		    qcom,init-mode is specified in any subnodes

	Value type: <string>

	Definition: The physical type of the regulator including the PMIC

		    family.  This is used for mode control.  Supported values:

		    "pmic4-ldo", "pmic4-hfsmps", "pmic4-ftsmps", "pmic4-bob",

		    "pmic5-ldo", "pmic5-hfsmps", "pmic5-ftsmps", and

		    "pmic5-bob".



- 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 4).  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 and XOB 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 and XOB 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 4).



- 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

========



#include <dt-bindings/regulator/qcom,rpmh-regulator-levels.h>



&apps_rsc {

	rpmh-regulator-cxlvl {

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

		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_RETENTION>;

			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_RETENTION>;

			regulator-max-microvolt = <RPMH_REGULATOR_LEVEL_MAX>;

		};

	};



	rpmh-regulator-smpa2 {

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

		qcom,resource-name = "smpa2";

		qcom,regulator-type = "pmic4-smps";

		qcom,supported-modes =

			<RPMH_REGULATOR_MODE_AUTO

			 RPMH_REGULATOR_MODE_HPM>;

		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_AUTO>;

			qcom,init-voltage = <1150000>;

		};

	};



	rpmh-regulator-ldoa4 {

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

		qcom,resource-name = "ldoa4";

		qcom,regulator-type = "pmic4-ldo";

		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>;

		};

	};



	rpmh-regulator-ldoc1 {

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

		qcom,resource-name = "ldoc1";

		pm8150l_l1: regulator-pm8150l-l1 {

			regulator-name = "pm8150l_l1";

			qcom,set = <RPMH_REGULATOR_SET_ALL>;

			regulator-min-microvolt = <1800000>;

			regulator-max-microvolt = <1800000>;

		};

	};

};



&disp_rsc {

	rpmh-regulator-ldoa3-disp {

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

		qcom,resource-name = "ldoa3";

		qcom,regulator-type = "pmic4-ldo";

		qcom,supported-modes =

			<RPMH_REGULATOR_MODE_LPM

			 RPMH_REGULATOR_MODE_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_LPM>;

			qcom,init-voltage = <1000000>;

			qcom,init-enable = <0>;

		};

	};

};

include/dt-bindings/regulator/qcom,rpmh-regulator-levels.h

+42 −1
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.

 */



#ifndef __QCOM_RPMH_REGULATOR_LEVELS_H
@@ -19,4 +19,45 @@ 
#define RPMH_REGULATOR_LEVEL_TURBO_L1	416

#define RPMH_REGULATOR_LEVEL_MAX	65535



/*

 * These set constants may be used as the value for qcom,set of an RPMh

 * resource device.

 */

#define RPMH_REGULATOR_SET_ACTIVE	1

#define RPMH_REGULATOR_SET_SLEEP	2

#define RPMH_REGULATOR_SET_ALL		3



/*

 * These mode constants may be used for qcom,supported-modes and qcom,init-mode

 * properties of an RPMh resource.  Each type of regulator supports a subset of

 * the possible modes.

 *

 * %RPMH_REGULATOR_MODE_PASS:	Pass-through mode in which output is directly

 *				tied to input.  This mode is only supported by

 *				BOB type regulators.

 * %RPMH_REGULATOR_MODE_RET:	Retention mode in which only an extremely small

 *				load current is allowed.  This mode is supported

 *				by LDO and SMPS type regulators.

 * %RPMH_REGULATOR_MODE_LPM:	Low power mode in which a small load current is

 *				allowed.  This mode corresponds to PFM for SMPS

 *				and BOB type regulators.  This mode is supported

 *				by LDO, HFSMPS, BOB, and PMIC4 FTSMPS type

 *				regulators.

 * %RPMH_REGULATOR_MODE_AUTO:	Auto mode in which the regulator hardware

 *				automatically switches between LPM and HPM based

 *				upon the real-time load current.  This mode is

 *				supported by HFSMPS, BOB, and PMIC4 FTSMPS type

 *				regulators.

 * %RPMH_REGULATOR_MODE_HPM:	High power mode in which the full rated current

 *				of the regulator is allowed.  This mode

 *				corresponds to PWM for SMPS and BOB type

 *				regulators.  This mode is supported by all types

 *				of regulators.

 */

#define RPMH_REGULATOR_MODE_PASS	0

#define RPMH_REGULATOR_MODE_RET		1

#define RPMH_REGULATOR_MODE_LPM		2

#define RPMH_REGULATOR_MODE_AUTO	3

#define RPMH_REGULATOR_MODE_HPM		4



#endif