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Commit 24cec022 authored by Kavya Nunna's avatar Kavya Nunna
Browse files

regulator: qpnp-regulator: Add snapshot of qpnp-regulator 



Add snapshot of qpnp-regulator from kernel 4.9 as of commit

7262d3811169("Merge "usb: gadget: handle usb connection events").

While at it, add support for debugfs node for qpnp-regulator.

Change-Id: Ie493446009c708339af93e9d81af47b8538b8c52
Signed-off-by: default avatarKavya Nunna <knunna@codeaurora.org>
parent 08db65b8

drivers/regulator/Kconfig

+10 −0
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@@ -1211,6 +1211,16 @@ config REGULATOR_STUB 
	  Consumers can use stub regulator device with proper constraint

	  checking while the real regulator driver is being developed.



config REGULATOR_QPNP

	tristate "Qualcomm Technologies, Inc. QPNP regulator support"

	depends on SPMI

	help

	  This driver supports voltage regulators in Qualcomm Technologies, Inc.

	  PMIC chips which comply with QPNP.  QPNP is a SPMI based PMIC

	  implementation.  These chips provide several different varieties of

	  LDO and switching regulators.  They also provide voltage switches and

	  boost regulators.



config VIRTIO_REGULATOR

	tristate "Virtio regulator driver"

	depends on VIRTIO

drivers/regulator/Makefile

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@@ -92,6 +92,7 @@ obj-$(CONFIG_REGULATOR_RPM_SMD) += rpm-smd-regulator.o 
obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o

obj-$(CONFIG_REGULATOR_QPNP_LCDB) += qpnp-lcdb-regulator.o

obj-$(CONFIG_REGULATOR_QPNP_AMOLED) += qpnp-amoled-regulator.o

obj-$(CONFIG_REGULATOR_QPNP) += qpnp-regulator.o

obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o

obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o

obj-$(CONFIG_REGULATOR_PV88060) += pv88060-regulator.o

drivers/regulator/qpnp-regulator.c

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+2449 −0

File added.

Preview size limit exceeded, changes collapsed.

include/linux/regulator/qpnp-regulator.h

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/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2012-2013, 2017, 2021, The Linux Foundation. All rights reserved.

 */



#ifndef __REGULATOR_QPNP_REGULATOR_H__

#define __REGULATOR_QPNP_REGULATOR_H__



#include <linux/regulator/machine.h>



#define QPNP_REGULATOR_DRIVER_NAME "qcom,qpnp-regulator"



/* Pin control enable input pins. */

#define QPNP_REGULATOR_PIN_CTRL_ENABLE_NONE		0x00

#define QPNP_REGULATOR_PIN_CTRL_ENABLE_EN0		0x01

#define QPNP_REGULATOR_PIN_CTRL_ENABLE_EN1		0x02

#define QPNP_REGULATOR_PIN_CTRL_ENABLE_EN2		0x04

#define QPNP_REGULATOR_PIN_CTRL_ENABLE_EN3		0x08

#define QPNP_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT	0x10



/* Pin control high power mode input pins. */

#define QPNP_REGULATOR_PIN_CTRL_HPM_NONE		0x00

#define QPNP_REGULATOR_PIN_CTRL_HPM_EN0			0x01

#define QPNP_REGULATOR_PIN_CTRL_HPM_EN1			0x02

#define QPNP_REGULATOR_PIN_CTRL_HPM_EN2			0x04

#define QPNP_REGULATOR_PIN_CTRL_HPM_EN3			0x08

#define QPNP_REGULATOR_PIN_CTRL_HPM_SLEEP_B		0x10

#define QPNP_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT		0x20



/*

 * Used with enable parameters to specify that hardware default register values

 * should be left unaltered.

 */

#define QPNP_REGULATOR_DISABLE				0

#define QPNP_REGULATOR_ENABLE				1

#define QPNP_REGULATOR_USE_HW_DEFAULT			2



/* Soft start strength of a voltage switch type regulator */

enum qpnp_vs_soft_start_str {

	QPNP_VS_SOFT_START_STR_0P05_UA,

	QPNP_VS_SOFT_START_STR_0P25_UA,

	QPNP_VS_SOFT_START_STR_0P55_UA,

	QPNP_VS_SOFT_START_STR_0P75_UA,

	QPNP_VS_SOFT_START_STR_HW_DEFAULT,

};



/* Current limit of a boost type regulator */

enum qpnp_boost_current_limit {

	QPNP_BOOST_CURRENT_LIMIT_300_MA,

	QPNP_BOOST_CURRENT_LIMIT_600_MA,

	QPNP_BOOST_CURRENT_LIMIT_900_MA,

	QPNP_BOOST_CURRENT_LIMIT_1200_MA,

	QPNP_BOOST_CURRENT_LIMIT_1500_MA,

	QPNP_BOOST_CURRENT_LIMIT_1800_MA,

	QPNP_BOOST_CURRENT_LIMIT_2100_MA,

	QPNP_BOOST_CURRENT_LIMIT_2400_MA,

	QPNP_BOOST_CURRENT_LIMIT_HW_DEFAULT,

};



/**

 * struct qpnp_regulator_platform_data - qpnp-regulator initialization data

 * @init_data:		regulator constraints

 * @pull_down_enable:       1 = Enable output pull down resistor when the

 *			        regulator is disabled

 *			    0 = Disable pull down resistor

 *			    QPNP_REGULATOR_USE_HW_DEFAULT = do not modify

 *			        pull down state

 * @pin_ctrl_enable:        Bit mask specifying which hardware pins should be

 *				used to enable the regulator, if any

 *			    Value should be an ORing of

 *				QPNP_REGULATOR_PIN_CTRL_ENABLE_* constants.  If

 *				the bit specified by

 *				QPNP_REGULATOR_PIN_CTRL_ENABLE_HW_DEFAULT is

 *				set, then pin control enable hardware registers

 *				will not be modified.

 * @pin_ctrl_hpm:           Bit mask specifying which hardware pins should be

 *				used to force the regulator into high power

 *				mode, if any

 *			    Value should be an ORing of

 *				QPNP_REGULATOR_PIN_CTRL_HPM_* constants.  If

 *				the bit specified by

 *				QPNP_REGULATOR_PIN_CTRL_HPM_HW_DEFAULT is

 *				set, then pin control mode hardware registers

 *				will not be modified.

 * @system_load:            Load in uA present on regulator that is not captured

 *				by any consumer request

 * @enable_time:            Time in us to delay after enabling the regulator

 * @ocp_enable:             1 = Allow over current protection (OCP) to be

 *				enabled for voltage switch type regulators so

 *				that they latch off automatically when over

 *				current is detected.  OCP is enabled when in HPM

 *				or auto mode.

 *			    0 = Disable OCP

 *			    QPNP_REGULATOR_USE_HW_DEFAULT = do not modify

 *			        OCP state

 * @ocp_irq:                IRQ number of the voltage switch OCP IRQ.  If

 *				specified the voltage switch will be toggled off

 *				and back on when OCP triggers in order to handle

 *				high in-rush current.

 * @ocp_max_retries:        Maximum number of times to try toggling a voltage

 *				switch off and back on as a result of

 *				consecutive over current events.

 * @ocp_retry_delay_ms:     Time to delay in milliseconds between each

 *				voltage switch toggle after an over current

 *				event takes place.

 * @boost_current_limit:    This parameter sets the current limit of boost type

 *				regulators.  Its value should be one of

 *				QPNP_BOOST_CURRENT_LIMIT_*.  If its value is

 *				QPNP_BOOST_CURRENT_LIMIT_HW_DEFAULT, then the

 *				boost current limit will be left at its default

 *				hardware value.

 * @soft_start_enable:      1 = Enable soft start for LDO and voltage switch

 *				type regulators so that output voltage slowly

 *				ramps up when the regulator is enabled

 *			    0 = Disable soft start

 *			    QPNP_REGULATOR_USE_HW_DEFAULT = do not modify

 *			        soft start state

 * @vs_soft_start_strength: This parameter sets the soft start strength for

 *				voltage switch type regulators.  Its value

 *				should be one of QPNP_VS_SOFT_START_STR_*.  If

 *				its value is QPNP_VS_SOFT_START_STR_HW_DEFAULT,

 *				then the soft start strength will be left at its

 *				default hardware value.

 * @auto_mode_enable:       1 = Enable automatic hardware selection of regulator

 *				mode (HPM vs LPM).  Auto mode is not available

 *				on boost type regulators

 *			    0 = Disable auto mode selection

 *			    QPNP_REGULATOR_USE_HW_DEFAULT = do not modify

 *			        auto mode state

 * @bypass_mode_enable:     1 = Enable bypass mode for an LDO type regulator so

 *				that it acts like a switch and simply outputs

 *				its input voltage

 *			    0 = Do not enable bypass mode

 *			    QPNP_REGULATOR_USE_HW_DEFAULT = do not modify

 *			        bypass mode state

 * @hpm_enable:             1 = Enable high power mode (HPM), also referred to

 *				as NPM.  HPM consumes more ground current than

 *				LPM, but it can source significantly higher load

 *				current.  HPM is not available on boost type

 *				regulators.  For voltage switch type regulators,

 *				HPM implies that over current protection and

 *				soft start are active all the time.  This

 *				configuration can be overwritten by changing the

 *				regulator's mode dynamically.

 *			    0 = Do not enable HPM

 *			    QPNP_REGULATOR_USE_HW_DEFAULT = do not modify

 *			        HPM state

 * @base_addr:              SMPI base address for the regulator peripheral

 */

struct qpnp_regulator_platform_data {

	struct regulator_init_data		init_data;

	int					pull_down_enable;

	unsigned int				pin_ctrl_enable;

	unsigned int				pin_ctrl_hpm;

	int					system_load;

	int					enable_time;

	int					ocp_enable;

	int					ocp_irq;

	int					ocp_max_retries;

	int					ocp_retry_delay_ms;

	enum qpnp_boost_current_limit		boost_current_limit;

	int					soft_start_enable;

	enum qpnp_vs_soft_start_str		vs_soft_start_strength;

	int					auto_mode_enable;

	int					bypass_mode_enable;

	int					hpm_enable;

	u16					base_addr;

};



#ifdef CONFIG_REGULATOR_QPNP



/**

 * qpnp_regulator_init() - register spmi driver for qpnp-regulator

 *

 * This initialization function should be called in systems in which driver

 * registration ordering must be controlled precisely.

 */

int __init qpnp_regulator_init(void);



#else



static inline int __init qpnp_regulator_init(void)

{

	return -ENODEV;

}



#endif /* CONFIG_REGULATOR_QPNP */



#endif