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Commit 7e9e00a1 authored by Kiran Gunda's avatar Kiran Gunda Committed by Gerrit - the friendly Code Review server
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regulator: spm_regulator: Add snapshot of spm_regulator driver 



This is snapshot of the spm_regulator driver as of msm-4.4
'commit 26efcc23eb82 ("regulator: spm: check min/max voltages
against HW configuration")'.

Also replace the __invoke_psci_fn_smc wrapper with arm_smccc_smc as
__invoke_psci_fn_smc is no longer available.

Change-Id: Ia6ded6dc21ecff2114ddd20e26706d9196239956
Signed-off-by: default avatarKiran Gunda <kgunda@codeaurora.org>
parent f9d484ef

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

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Qualcomm Technologies Inc. SPM Regulators



spm-regulator is a regulator device which supports PMIC processor supply

regulators via the SPM module.



Required properties:

- compatible:      Must be "qcom,spm-regulator"

- reg:             Specifies the SPMI address and size for this regulator device

- regulator-name:  A string used as a descriptive name for the regulator



Required structure:

- A qcom,spm-regulator node must be a child of an SPMI node that has specified

	the spmi-slave-container property



Optional properties:

- qcom,mode:       A string which specifies the mode to use for the regulator.

		    Supported values are "pwm" and "auto".  PWM mode is more

		    robust, but draws more current than auto mode.  If this

		    property is not specified, then the regulator will remain

		    in whatever mode hardware or bootloaders set it to.

- qcom,cpu-num:    Specifies which CPU this regulator powers.  This property is

		    not need when the SPM regulator is shared between all CPUs.

- qcom,bypass-spm: Boolean flag which indicates that voltage control should not

		    be managed by an SPM.  Instead, the voltage should be

		    controlled via SPMI.

- qcom,max-voltage-step:  Maximum single voltage step size in microvolts.

- qcom,recal-mask: Bit mask of the APSS clusters to recalibrate after each

		    voltage change.  Bit 0 corresponds to the first cluster,

		    bit 1 corresponds to the second cluster, and so on.



Optional structure:

- A child node may be specified within a qcom,spm-regulator node which defines

	an additional regulator which controls the AVS minimum and maximum

	voltage limits.

- The AVS child node must contain these properties defined in regulator.txt:

	regulator-name, regulator-min-microvolt, regulator-max-microvolt.



All properties specified within the core regulator framework can also be used.

These bindings can be found in regulator.txt.



Example:

	qcom,spmi@fc4c0000 {



		qcom,pm8226@1 {

			spmi-slave-container;



			spm-regulator@1700 {

				compatible = "qcom,spm-regulator";

				regulator-name = "8226_s2";

				reg = <0x1700 0x100>;

				regulator-min-microvolt = <900000>;

				regulator-max-microvolt = <1275000>;



				avs-limit-regulator {

					regulator-name = "8226_s2_avs_limit";

					regulator-min-microvolt = <900000>;

					regulator-max-microvolt = <1275000>;

				}

			};

		};

	};

drivers/regulator/Kconfig

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@@ -1057,6 +1057,16 @@ config REGULATOR_RPM_SMD 
	  be used on systems which contain an RPM which communicates with the

	  application processor over SMD.



config REGULATOR_SPM

	bool "SPM regulator driver"

	depends on SPMI

	help

	  Enable support for the SPM regulator driver which is used for

	  setting voltages of processor supply regulators via the SPM module

	  found inside chips of Qualcomm Technologies Inc. The SPM regulator

	  driver can be used on QTI SoCs where the APSS processor cores are

	  supplied by their own PMIC regulator.



config REGULATOR_STUB

	tristate "Stub Regulator"

	help

drivers/regulator/Makefile

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@@ -114,6 +114,7 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o 
obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o

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

obj-$(CONFIG_REGULATOR_RPM_SMD) += rpm-smd-regulator.o

obj-$(CONFIG_REGULATOR_SPM) += spm-regulator.o



obj-$(CONFIG_REGULATOR_CPR3) += cpr3-regulator.o cpr3-util.o

obj-$(CONFIG_REGULATOR_CPR3_HMSS) += cpr3-hmss-regulator.o

drivers/regulator/spm-regulator.c

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File added.

Preview size limit exceeded, changes collapsed.

include/linux/regulator/spm-regulator.h

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/* Copyright (c) 2013-2014, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

 * only version 2 as published by the Free Software Foundation.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#ifndef _LINUX_REGULATOR_SPM_H

#define _LINUX_REGULATOR_SPM_H



#include <linux/err.h>

#include <linux/init.h>



#ifdef CONFIG_REGULATOR_SPM

int __init spm_regulator_init(void);

#else

static inline int __init spm_regulator_init(void) { return -ENODEV; }

#endif



#endif