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Commit 5ec271e7 authored by Balaji Rao's avatar Balaji Rao Committed by Samuel Ortiz
Browse files

regulator: PCF50633 pmic driver 



Changes from V1:
	- Removed support for suspend_enable & suspend_disable functions.

Signed-off-by: default avatarBalaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@openedhand.com>
parent 1851b06a

drivers/regulator/Kconfig

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Original line number Diff line number Diff line
@@ -73,4 +73,11 @@ config REGULATOR_DA903X 
	  Say y here to support the BUCKs and LDOs regulators found on

	  Dialog Semiconductor DA9030/DA9034 PMIC.



config REGULATOR_PCF50633

	tristate "PCF50633 regulator driver"

        depends on MFD_PCF50633

	help

	 Say Y here to support the voltage regulators and convertors

	 on PCF50633



endif

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -11,5 +11,6 @@ obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o 
obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o

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

obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o

obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o



ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

drivers/regulator/pcf50633-regulator.c

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/* NXP PCF50633 PMIC Driver

 *

 * (C) 2006-2008 by Openmoko, Inc.

 * Author: Balaji Rao <balajirrao@openmoko.org>

 * All rights reserved.

 *

 * Broken down from monstrous PCF50633 driver mainly by

 * Harald Welte and Andy Green and Werner Almesberger

 *

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

 *  under  the terms of  the GNU General  Public License as published by the

 *  Free Software Foundation;  either version 2 of the  License, or (at your

 *  option) any later version.

 *

 */



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/platform_device.h>



#include <linux/mfd/pcf50633/core.h>

#include <linux/mfd/pcf50633/pmic.h>



#define PCF50633_REGULATOR(_name, _id) 		\

	{					\

		.name = _name, 			\

		.id = _id,			\

		.ops = &pcf50633_regulator_ops,	\

		.type = REGULATOR_VOLTAGE, 	\

		.owner = THIS_MODULE, 		\

	}



static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {

	[PCF50633_REGULATOR_AUTO]	= PCF50633_REG_AUTOOUT,

	[PCF50633_REGULATOR_DOWN1]	= PCF50633_REG_DOWN1OUT,

	[PCF50633_REGULATOR_DOWN2]	= PCF50633_REG_DOWN2OUT,

	[PCF50633_REGULATOR_MEMLDO]	= PCF50633_REG_MEMLDOOUT,

	[PCF50633_REGULATOR_LDO1]	= PCF50633_REG_LDO1OUT,

	[PCF50633_REGULATOR_LDO2]	= PCF50633_REG_LDO2OUT,

	[PCF50633_REGULATOR_LDO3]	= PCF50633_REG_LDO3OUT,

	[PCF50633_REGULATOR_LDO4]	= PCF50633_REG_LDO4OUT,

	[PCF50633_REGULATOR_LDO5]	= PCF50633_REG_LDO5OUT,

	[PCF50633_REGULATOR_LDO6]	= PCF50633_REG_LDO6OUT,

	[PCF50633_REGULATOR_HCLDO]	= PCF50633_REG_HCLDOOUT,

};



/* Bits from voltage value */

static u8 auto_voltage_bits(unsigned int millivolts)

{

	if (millivolts < 1800)

		return 0;

	if (millivolts > 3800)

		return 0xff;



	millivolts -= 625;



	return millivolts / 25;

}



static u8 down_voltage_bits(unsigned int millivolts)

{

	if (millivolts < 625)

		return 0;

	else if (millivolts > 3000)

		return 0xff;



	millivolts -= 625;



	return millivolts / 25;

}



static u8 ldo_voltage_bits(unsigned int millivolts)

{

	if (millivolts < 900)

		return 0;

	else if (millivolts > 3600)

		return 0x1f;



	millivolts -= 900;

	return millivolts / 100;

}



/* Obtain voltage value from bits */

static unsigned int auto_voltage_value(u8 bits)

{

	if (bits < 0x2f)

		return 0;



	return 625 + (bits * 25);

}





static unsigned int down_voltage_value(u8 bits)

{

	return 625 + (bits * 25);

}





static unsigned int ldo_voltage_value(u8 bits)

{

	bits &= 0x1f;



	return 900 + (bits * 100);

}



static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,

						int min_uV, int max_uV)

{

	struct pcf50633 *pcf;

	int regulator_id, millivolts;

	u8 volt_bits, regnr;



	pcf = rdev_get_drvdata(rdev);



	regulator_id = rdev_get_id(rdev);

	if (regulator_id >= PCF50633_NUM_REGULATORS)

		return -EINVAL;



	millivolts = min_uV / 1000;



	regnr = pcf50633_regulator_registers[regulator_id];



	switch (regulator_id) {

	case PCF50633_REGULATOR_AUTO:

		volt_bits = auto_voltage_bits(millivolts);

		break;

	case PCF50633_REGULATOR_DOWN1:

		volt_bits = down_voltage_bits(millivolts);

		break;

	case PCF50633_REGULATOR_DOWN2:

		volt_bits = down_voltage_bits(millivolts);

		break;

	case PCF50633_REGULATOR_LDO1:

	case PCF50633_REGULATOR_LDO2:

	case PCF50633_REGULATOR_LDO3:

	case PCF50633_REGULATOR_LDO4:

	case PCF50633_REGULATOR_LDO5:

	case PCF50633_REGULATOR_LDO6:

	case PCF50633_REGULATOR_HCLDO:

		volt_bits = ldo_voltage_bits(millivolts);

		break;

	default:

		return -EINVAL;

	}



	return pcf50633_reg_write(pcf, regnr, volt_bits);

}



static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev)

{

	struct pcf50633 *pcf;

	int regulator_id, millivolts, volt_bits;

	u8 regnr;



	pcf = rdev_get_drvdata(rdev);;



	regulator_id = rdev_get_id(rdev);

	if (regulator_id >= PCF50633_NUM_REGULATORS)

		return -EINVAL;



	regnr = pcf50633_regulator_registers[regulator_id];



	volt_bits = pcf50633_reg_read(pcf, regnr);

	if (volt_bits < 0)

		return -1;



	switch (regulator_id) {

	case PCF50633_REGULATOR_AUTO:

		millivolts = auto_voltage_value(volt_bits);

		break;

	case PCF50633_REGULATOR_DOWN1:

		millivolts = down_voltage_value(volt_bits);

		break;

	case PCF50633_REGULATOR_DOWN2:

		millivolts = down_voltage_value(volt_bits);

		break;

	case PCF50633_REGULATOR_LDO1:

	case PCF50633_REGULATOR_LDO2:

	case PCF50633_REGULATOR_LDO3:

	case PCF50633_REGULATOR_LDO4:

	case PCF50633_REGULATOR_LDO5:

	case PCF50633_REGULATOR_LDO6:

	case PCF50633_REGULATOR_HCLDO:

		millivolts = ldo_voltage_value(volt_bits);

		break;

	default:

		return -EINVAL;

	}



	return millivolts * 1000;

}



static int pcf50633_regulator_enable(struct regulator_dev *rdev)

{

	struct pcf50633 *pcf = rdev_get_drvdata(rdev);

	int regulator_id;

	u8 regnr;



	regulator_id = rdev_get_id(rdev);

	if (regulator_id >= PCF50633_NUM_REGULATORS)

		return -EINVAL;



	/* The *ENA register is always one after the *OUT register */

	regnr = pcf50633_regulator_registers[regulator_id] + 1;



	return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON,

						       PCF50633_REGULATOR_ON);

}



static int pcf50633_regulator_disable(struct regulator_dev *rdev)

{

	struct pcf50633 *pcf = rdev_get_drvdata(rdev);

	int regulator_id;

	u8 regnr;



	regulator_id = rdev_get_id(rdev);

	if (regulator_id >= PCF50633_NUM_REGULATORS)

		return -EINVAL;



	/* the *ENA register is always one after the *OUT register */

	regnr = pcf50633_regulator_registers[regulator_id] + 1;



	return pcf50633_reg_set_bit_mask(pcf, regnr,

					PCF50633_REGULATOR_ON, 0);

}



static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev)

{

	struct pcf50633 *pcf = rdev_get_drvdata(rdev);

	int regulator_id = rdev_get_id(rdev);

	u8 regnr;



	regulator_id = rdev_get_id(rdev);

	if (regulator_id >= PCF50633_NUM_REGULATORS)

		return -EINVAL;



	/* the *ENA register is always one after the *OUT register */

	regnr = pcf50633_regulator_registers[regulator_id] + 1;



	return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON;

}



static struct regulator_ops pcf50633_regulator_ops = {

	.set_voltage = pcf50633_regulator_set_voltage,

	.get_voltage = pcf50633_regulator_get_voltage,

	.enable = pcf50633_regulator_enable,

	.disable = pcf50633_regulator_disable,

	.is_enabled = pcf50633_regulator_is_enabled,

};



static struct regulator_desc regulators[] = {

	[PCF50633_REGULATOR_AUTO] =

		PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO),

	[PCF50633_REGULATOR_DOWN1] =

		PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1),

	[PCF50633_REGULATOR_DOWN2] =

		PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2),

	[PCF50633_REGULATOR_LDO1] =

		PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1),

	[PCF50633_REGULATOR_LDO2] =

		PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2),

	[PCF50633_REGULATOR_LDO3] =

		PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3),

	[PCF50633_REGULATOR_LDO4] =

		PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4),

	[PCF50633_REGULATOR_LDO5] =

		PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5),

	[PCF50633_REGULATOR_LDO6] =

		PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6),

	[PCF50633_REGULATOR_HCLDO] =

		PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO),

	[PCF50633_REGULATOR_MEMLDO] =

		PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO),

};



static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)

{

	struct regulator_dev *rdev;

	struct pcf50633 *pcf;



	/* Already set by core driver */

	pcf = platform_get_drvdata(pdev);



	rdev = regulator_register(&regulators[pdev->id], &pdev->dev, pcf);

	if (IS_ERR(rdev))

		return PTR_ERR(rdev);



	if (pcf->pdata->regulator_registered)

		pcf->pdata->regulator_registered(pcf, pdev->id);



	return 0;

}



static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)

{

	struct regulator_dev *rdev = platform_get_drvdata(pdev);



	regulator_unregister(rdev);



	return 0;

}



static struct platform_driver pcf50633_regulator_driver = {

	.driver = {

		.name = "pcf50633-regltr",

	},

	.probe = pcf50633_regulator_probe,

	.remove = __devexit_p(pcf50633_regulator_remove),

};



static int __init pcf50633_regulator_init(void)

{

	return platform_driver_register(&pcf50633_regulator_driver);

}

module_init(pcf50633_regulator_init);



static void __exit pcf50633_regulator_exit(void)

{

	platform_driver_unregister(&pcf50633_regulator_driver);

}

module_exit(pcf50633_regulator_exit);



MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");

MODULE_DESCRIPTION("PCF50633 regulator driver");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:pcf50633-regulator");

include/linux/mfd/pcf50633/pmic.h

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#ifndef __LINUX_MFD_PCF50633_PMIC_H

#define __LINUX_MFD_PCF50633_PMIC_H



#include <linux/mfd/pcf50633/core.h>

#include <linux/platform_device.h>



#define PCF50633_REG_AUTOOUT	0x1a

#define PCF50633_REG_AUTOENA	0x1b

#define PCF50633_REG_AUTOCTL	0x1c

#define PCF50633_REG_AUTOMXC	0x1d

#define PCF50633_REG_DOWN1OUT	0x1e

#define PCF50633_REG_DOWN1ENA	0x1f

#define PCF50633_REG_DOWN1CTL	0x20

#define PCF50633_REG_DOWN1MXC	0x21

#define PCF50633_REG_DOWN2OUT	0x22

#define PCF50633_REG_DOWN2ENA	0x23

#define PCF50633_REG_DOWN2CTL	0x24

#define PCF50633_REG_DOWN2MXC	0x25

#define PCF50633_REG_MEMLDOOUT	0x26

#define PCF50633_REG_MEMLDOENA	0x27

#define PCF50633_REG_LDO1OUT	0x2d

#define PCF50633_REG_LDO1ENA	0x2e

#define PCF50633_REG_LDO2OUT	0x2f

#define PCF50633_REG_LDO2ENA	0x30

#define PCF50633_REG_LDO3OUT	0x31

#define PCF50633_REG_LDO3ENA	0x32

#define PCF50633_REG_LDO4OUT	0x33

#define PCF50633_REG_LDO4ENA	0x34

#define PCF50633_REG_LDO5OUT	0x35

#define PCF50633_REG_LDO5ENA	0x36

#define PCF50633_REG_LDO6OUT	0x37

#define PCF50633_REG_LDO6ENA	0x38

#define PCF50633_REG_HCLDOOUT	0x39

#define PCF50633_REG_HCLDOENA	0x3a

#define PCF50633_REG_HCLDOOVL	0x40



enum pcf50633_regulator_enable {

	PCF50633_REGULATOR_ON		= 0x01,

	PCF50633_REGULATOR_ON_GPIO1	= 0x02,

	PCF50633_REGULATOR_ON_GPIO2	= 0x04,

	PCF50633_REGULATOR_ON_GPIO3	= 0x08,

};

#define PCF50633_REGULATOR_ON_MASK	0x0f



enum pcf50633_regulator_phase {

	PCF50633_REGULATOR_ACTPH1	= 0x00,

	PCF50633_REGULATOR_ACTPH2	= 0x10,

	PCF50633_REGULATOR_ACTPH3	= 0x20,

	PCF50633_REGULATOR_ACTPH4	= 0x30,

};

#define PCF50633_REGULATOR_ACTPH_MASK	0x30



enum pcf50633_regulator_id {

	PCF50633_REGULATOR_AUTO,

	PCF50633_REGULATOR_DOWN1,

	PCF50633_REGULATOR_DOWN2,

	PCF50633_REGULATOR_LDO1,

	PCF50633_REGULATOR_LDO2,

	PCF50633_REGULATOR_LDO3,

	PCF50633_REGULATOR_LDO4,

	PCF50633_REGULATOR_LDO5,

	PCF50633_REGULATOR_LDO6,

	PCF50633_REGULATOR_HCLDO,

	PCF50633_REGULATOR_MEMLDO,

};

#endif