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Commit 16f10918 authored by Steve Twiss's avatar Steve Twiss Committed by Mark Brown
Browse files

regulator: da9210: New driver 



I2C driver for the Dialog DA9210 Multi-phase 12A DC-DC Buck.

Signed-off-by: default avatarSteve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: default avatarDavid Dajun Chen <david.chen@diasemi.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 82b736df

drivers/regulator/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -147,6 +147,16 @@ config REGULATOR_DA9055 
	  This driver can also be built as a module. If so, the module

	  will be called da9055-regulator.



config REGULATOR_DA9210

	tristate "Dialog Semiconductor DA9210 regulator"

	depends on I2C

	select REGMAP_I2C

	help

	  Say y here to support for the Dialog Semiconductor DA9210.

	  The DA9210 is a multi-phase synchronous step down

	  converter 12A DC-DC Buck controlled through an I2C

	  interface.



config REGULATOR_DBX500_PRCMU

	bool

drivers/regulator/Makefile

+1 −0
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@@ -20,6 +20,7 @@ obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o 
obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o

obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o

obj-$(CONFIG_REGULATOR_DA9055)	+= da9055-regulator.o

obj-$(CONFIG_REGULATOR_DA9210) += da9210-regulator.o

obj-$(CONFIG_REGULATOR_DBX500_PRCMU) += dbx500-prcmu.o

obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o

obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o

drivers/regulator/da9210-regulator.c

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/*

 * da9210-regulator.c - Regulator device driver for DA9210

 * Copyright (C) 2013  Dialog Semiconductor Ltd.

 *

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

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA  02110-1301, USA.

 */



#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regmap.h>



#include "da9210-regulator.h"



struct da9210 {

	struct regulator_dev *rdev;

	struct regmap *regmap;

};



static const struct regmap_config da9210_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,

};



static int da9210_set_current_limit(struct regulator_dev *rdev, int min_uA,

				    int max_uA);

static int da9210_get_current_limit(struct regulator_dev *rdev);



static struct regulator_ops da9210_buck_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.list_voltage = regulator_list_voltage_linear,

	.set_current_limit = da9210_set_current_limit,

	.get_current_limit = da9210_get_current_limit,

};



/* Default limits measured in millivolts and milliamps */

#define DA9210_MIN_MV		300

#define DA9210_MAX_MV		1570

#define DA9210_STEP_MV		10



/* Current limits for buck (uA) indices corresponds with register values */

static const int da9210_buck_limits[] = {

	1600000, 1800000, 2000000, 2200000, 2400000, 2600000, 2800000, 3000000,

	3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000, 4600000

};



static const struct regulator_desc da9210_reg = {

	.name = "DA9210",

	.id = 0,

	.ops = &da9210_buck_ops,

	.type = REGULATOR_VOLTAGE,

	.n_voltages = ((DA9210_MAX_MV - DA9210_MIN_MV) / DA9210_STEP_MV) + 1,

	.min_uV = (DA9210_MIN_MV * 1000),

	.uV_step = (DA9210_STEP_MV * 1000),

	.vsel_reg = DA9210_REG_VBUCK_A,

	.vsel_mask = DA9210_VBUCK_MASK,

	.enable_reg = DA9210_REG_BUCK_CONT,

	.enable_mask = DA9210_BUCK_EN,

	.owner = THIS_MODULE,

};



static int da9210_set_current_limit(struct regulator_dev *rdev, int min_uA,

				    int max_uA)

{

	struct da9210 *chip = rdev_get_drvdata(rdev);

	unsigned int sel;

	int i;



	/* search for closest to maximum */

	for (i = ARRAY_SIZE(da9210_buck_limits)-1; i >= 0; i--) {

		if (min_uA <= da9210_buck_limits[i] &&

		    max_uA >= da9210_buck_limits[i]) {

			sel = i;

			sel = sel << DA9210_BUCK_ILIM_SHIFT;

			return regmap_update_bits(chip->regmap,

						  DA9210_REG_BUCK_ILIM,

						  DA9210_BUCK_ILIM_MASK, sel);

		}

	}



	return -EINVAL;

}



static int da9210_get_current_limit(struct regulator_dev *rdev)

{

	struct da9210 *chip = rdev_get_drvdata(rdev);

	unsigned int data;

	unsigned int sel;

	int ret;



	ret = regmap_read(chip->regmap, DA9210_REG_BUCK_ILIM, &data);

	if (ret < 0)

		return ret;



	/* select one of 16 values: 0000 (1600mA) to 1111 (4600mA) */

	sel = (data & DA9210_BUCK_ILIM_MASK) >> DA9210_BUCK_ILIM_SHIFT;



	return da9210_buck_limits[sel];

}



/*

 * I2C driver interface functions

 */

static int da9210_i2c_probe(struct i2c_client *i2c,

			    const struct i2c_device_id *id)

{

	struct da9210 *chip;

	struct da9210_pdata *pdata = i2c->dev.platform_data;

	struct regulator_dev *rdev = NULL;

	struct regulator_config config = { };

	int error;



	chip = devm_kzalloc(&i2c->dev, sizeof(struct da9210), GFP_KERNEL);

	if (NULL == chip) {

		dev_err(&i2c->dev,

			"Cannot kzalloc memory for regulator structure\n");

		return -ENOMEM;

	}



	chip->regmap = devm_regmap_init_i2c(i2c, &da9210_regmap_config);

	if (IS_ERR(chip->regmap)) {

		error = PTR_ERR(chip->regmap);

		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",

			error);

		return error;

	}



	config.dev = &i2c->dev;

	if (pdata)

		config.init_data = &pdata->da9210_constraints;

	config.driver_data = chip;

	config.regmap = chip->regmap;



	rdev = regulator_register(&da9210_reg, &config);

	if (IS_ERR(rdev)) {

		dev_err(&i2c->dev, "Failed to register DA9210 regulator\n");

		return PTR_ERR(rdev);

	}



	chip->rdev = rdev;



	i2c_set_clientdata(i2c, chip);



	return 0;

}



static int da9210_i2c_remove(struct i2c_client *i2c)

{

	struct da9210 *chip = i2c_get_clientdata(i2c);

	regulator_unregister(chip->rdev);

	return 0;

}



static const struct i2c_device_id da9210_i2c_id[] = {

	{"da9210", 0},

	{},

};



MODULE_DEVICE_TABLE(i2c, da9210_i2c_id);



static struct i2c_driver da9210_regulator_driver = {

	.driver = {

		.name = "da9210",

		.owner = THIS_MODULE,

	},

	.probe = da9210_i2c_probe,

	.remove = da9210_i2c_remove,

	.id_table = da9210_i2c_id,

};



module_i2c_driver(da9210_regulator_driver);



MODULE_AUTHOR("S Twiss <stwiss.opensource@diasemi.com>");

MODULE_DESCRIPTION("Regulator device driver for Dialog DA9210");

MODULE_LICENSE("GPL v2");

MODULE_ALIAS("i2c:da9210");

drivers/regulator/da9210-regulator.h

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/*

 * da9210-regulator.h - Regulator definitions for DA9210

 * Copyright (C) 2013  Dialog Semiconductor Ltd.

 *

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

 * modify it under the terms of the GNU Library General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library 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

 * Library General Public License for more details.

 *

 * You should have received a copy of the GNU Library General Public

 * License along with this library; if not, write to the

 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,

 * Boston, MA  02110-1301, USA.

 */



#ifndef __DA9210_REGISTERS_H__

#define __DA9210_REGISTERS_H__



struct da9210_pdata {

	struct regulator_init_data da9210_constraints;

};



/* Page selection */

#define	DA9210_REG_PAGE_CON			0x00



/* System Control and Event Registers */

#define	DA9210_REG_STATUS_A			0x50

#define	DA9210_REG_STATUS_B			0x51

#define	DA9210_REG_EVENT_A			0x52

#define	DA9210_REG_EVENT_B			0x53

#define	DA9210_REG_MASK_A			0x54

#define	DA9210_REG_MASK_B			0x55

#define	DA9210_REG_CONTROL_A			0x56



/* GPIO Control Registers */

#define	DA9210_REG_GPIO_0_1			0x58

#define	DA9210_REG_GPIO_2_3			0x59

#define	DA9210_REG_GPIO_4_5			0x5A

#define	DA9210_REG_GPIO_6			0x5B



/* Regulator Registers */

#define	DA9210_REG_BUCK_CONT			0x5D

#define	DA9210_REG_BUCK_ILIM			0xD0

#define	DA9210_REG_BUCK_CONF1			0xD1

#define	DA9210_REG_BUCK_CONF2			0xD2

#define DA9210_REG_VBACK_AUTO			0xD4

#define DA9210_REG_VBACK_BASE			0xD5

#define DA9210_REG_VBACK_MAX_DVC_IF		0xD6

#define DA9210_REG_VBACK_DVC			0xD7

#define	DA9210_REG_VBUCK_A			0xD8

#define	DA9210_REG_VBUCK_B			0xD9



/* I2C Interface Settings */

#define DA9210_REG_INTERFACE			0x105



/* OTP */

#define	DA9210_REG_OPT_COUNT			0x140

#define	DA9210_REG_OPT_ADDR			0x141

#define	DA9210_REG_OPT_DATA			0x142



/* Customer Trim and Configuration */

#define	DA9210_REG_CONFIG_A			0x143

#define	DA9210_REG_CONFIG_B			0x144

#define	DA9210_REG_CONFIG_C			0x145

#define	DA9210_REG_CONFIG_D			0x146

#define	DA9210_REG_CONFIG_E			0x147





/*

 * Registers bits

 */

/* DA9210_REG_PAGE_CON (addr=0x00) */

#define	DA9210_PEG_PAGE_SHIFT			0

#define	DA9210_REG_PAGE_MASK			0x0F

/* On I2C registers 0x00 - 0xFF */

#define	DA9210_REG_PAGE0			0

/* On I2C registers 0x100 - 0x1FF */

#define	DA9210_REG_PAGE2			2

#define	DA9210_PAGE_WRITE_MODE			0x00

#define	DA9210_REPEAT_WRITE_MODE		0x40

#define	DA9210_PAGE_REVERT			0x80



/* DA9210_REG_STATUS_A (addr=0x50) */

#define	DA9210_GPI0				0x01

#define	DA9210_GPI1				0x02

#define	DA9210_GPI2				0x04

#define	DA9210_GPI3				0x08

#define	DA9210_GPI4				0x10

#define	DA9210_GPI5				0x20

#define	DA9210_GPI6				0x40



/* DA9210_REG_EVENT_A (addr=0x52) */

#define	DA9210_E_GPI0				0x01

#define	DA9210_E_GPI1				0x02

#define	DA9210_E_GPI2				0x04

#define	DA9210_E_GPI3				0x08

#define	DA9210_E_GPI4				0x10

#define	DA9210_E_GPI5				0x20

#define	DA9210_E_GPI6				0x40



/* DA9210_REG_EVENT_B (addr=0x53) */

#define	DA9210_E_OVCURR				0x01

#define	DA9210_E_NPWRGOOD			0x02

#define	DA9210_E_TEMP_WARN			0x04

#define	DA9210_E_TEMP_CRIT			0x08

#define	DA9210_E_VMAX				0x10



/* DA9210_REG_MASK_A (addr=0x54) */

#define	DA9210_M_GPI0				0x01

#define	DA9210_M_GPI1				0x02

#define	DA9210_M_GPI2				0x04

#define	DA9210_M_GPI3				0x08

#define	DA9210_M_GPI4				0x10

#define	DA9210_M_GPI5				0x20

#define	DA9210_M_GPI6				0x40



/* DA9210_REG_MASK_B (addr=0x55) */

#define	DA9210_M_OVCURR				0x01

#define	DA9210_M_NPWRGOOD			0x02

#define	DA9210_M_TEMP_WARN			0x04

#define	DA9210_M_TEMP_CRIT			0x08

#define	DA9210_M_VMAX				0x10



/* DA9210_REG_CONTROL_A (addr=0x56) */

#define	DA9210_DEBOUNCING_SHIFT			0

#define	DA9210_DEBOUNCING_MASK			0x07

#define	DA9210_SLEW_RATE_SHIFT			3

#define	DA9210_SLEW_RATE_MASK			0x18

#define	DA9210_V_LOCK				0x20



/* DA9210_REG_GPIO_0_1 (addr=0x58) */

#define	DA9210_GPIO0_PIN_SHIFT			0

#define	DA9210_GPIO0_PIN_MASK			0x03

#define		DA9210_GPIO0_PIN_GPI		0x00

#define		DA9210_GPIO0_PIN_GPO_OD		0x02

#define		DA9210_GPIO0_PIN_GPO		0x03

#define	DA9210_GPIO0_TYPE			0x04

#define		DA9210_GPIO0_TYPE_GPI		0x00

#define		DA9210_GPIO0_TYPE_GPO		0x04

#define	DA9210_GPIO0_MODE			0x08

#define	DA9210_GPIO1_PIN_SHIFT			4

#define	DA9210_GPIO1_PIN_MASK			0x30

#define		DA9210_GPIO1_PIN_GPI		0x00

#define		DA9210_GPIO1_PIN_VERROR		0x10

#define		DA9210_GPIO1_PIN_GPO_OD		0x20

#define		DA9210_GPIO1_PIN_GPO		0x30

#define	DA9210_GPIO1_TYPE_SHIFT			0x40

#define		DA9210_GPIO1_TYPE_GPI		0x00

#define		DA9210_GPIO1_TYPE_GPO		0x40

#define	DA9210_GPIO1_MODE			0x80



/* DA9210_REG_GPIO_2_3 (addr=0x59) */

#define	DA9210_GPIO2_PIN_SHIFT			0

#define	DA9210_GPIO2_PIN_MASK			0x03

#define		DA9210_GPIO2_PIN_GPI		0x00

#define		DA9210_GPIO5_PIN_BUCK_CLK	0x10

#define		DA9210_GPIO2_PIN_GPO_OD		0x02

#define		DA9210_GPIO2_PIN_GPO		0x03

#define	DA9210_GPIO2_TYPE			0x04

#define		DA9210_GPIO2_TYPE_GPI		0x00

#define		DA9210_GPIO2_TYPE_GPO		0x04

#define	DA9210_GPIO2_MODE			0x08

#define	DA9210_GPIO3_PIN_SHIFT			4

#define	DA9210_GPIO3_PIN_MASK			0x30

#define		DA9210_GPIO3_PIN_GPI		0x00

#define		DA9210_GPIO3_PIN_IERROR		0x10

#define		DA9210_GPIO3_PIN_GPO_OD		0x20

#define		DA9210_GPIO3_PIN_GPO		0x30

#define	DA9210_GPIO3_TYPE_SHIFT			0x40

#define		DA9210_GPIO3_TYPE_GPI		0x00

#define		DA9210_GPIO3_TYPE_GPO		0x40

#define	DA9210_GPIO3_MODE			0x80



/* DA9210_REG_GPIO_4_5 (addr=0x5A) */

#define	DA9210_GPIO4_PIN_SHIFT			0

#define	DA9210_GPIO4_PIN_MASK			0x03

#define		DA9210_GPIO4_PIN_GPI		0x00

#define		DA9210_GPIO4_PIN_GPO_OD		0x02

#define		DA9210_GPIO4_PIN_GPO		0x03

#define	DA9210_GPIO4_TYPE			0x04

#define		DA9210_GPIO4_TYPE_GPI		0x00

#define		DA9210_GPIO4_TYPE_GPO		0x04

#define	DA9210_GPIO4_MODE			0x08

#define	DA9210_GPIO5_PIN_SHIFT			4

#define	DA9210_GPIO5_PIN_MASK			0x30

#define		DA9210_GPIO5_PIN_GPI		0x00

#define		DA9210_GPIO5_PIN_INTERFACE	0x01

#define		DA9210_GPIO5_PIN_GPO_OD		0x20

#define		DA9210_GPIO5_PIN_GPO		0x30

#define	DA9210_GPIO5_TYPE_SHIFT			0x40

#define		DA9210_GPIO5_TYPE_GPI		0x00

#define		DA9210_GPIO5_TYPE_GPO		0x40

#define	DA9210_GPIO5_MODE			0x80



/* DA9210_REG_GPIO_6 (addr=0x5B) */

#define	DA9210_GPIO6_PIN_SHIFT			0

#define	DA9210_GPIO6_PIN_MASK			0x03

#define		DA9210_GPIO6_PIN_GPI		0x00

#define		DA9210_GPIO6_PIN_INTERFACE	0x01

#define		DA9210_GPIO6_PIN_GPO_OD		0x02

#define		DA9210_GPIO6_PIN_GPO		0x03

#define	DA9210_GPIO6_TYPE			0x04

#define		DA9210_GPIO6_TYPE_GPI		0x00

#define		DA9210_GPIO6_TYPE_GPO		0x04

#define	DA9210_GPIO6_MODE			0x08



/* DA9210_REG_BUCK_CONT (addr=0x5D) */

#define	DA9210_BUCK_EN				0x01

#define	DA9210_BUCK_GPI_SHIFT			1

#define DA9210_BUCK_GPI_MASK			0x06

#define		DA9210_BUCK_GPI_OFF		0x00

#define		DA9210_BUCK_GPI_GPIO0		0x02

#define		DA9210_BUCK_GPI_GPIO3		0x04

#define		DA9210_BUCK_GPI_GPIO4		0x06

#define	DA9210_BUCK_PD_DIS			0x08

#define	DA9210_VBUCK_SEL			0x10

#define		DA9210_VBUCK_SEL_A		0x00

#define		DA9210_VBUCK_SEL_B		0x10

#define	DA9210_VBUCK_GPI_SHIFT			5

#define	DA9210_VBUCK_GPI_MASK			0x60

#define		DA9210_VBUCK_GPI_OFF		0x00

#define		DA9210_VBUCK_GPI_GPIO0		0x20

#define		DA9210_VBUCK_GPI_GPIO3		0x40

#define		DA9210_VBUCK_GPI_GPIO4		0x60

#define	DA9210_DVC_CTRL_EN			0x80



/* DA9210_REG_BUCK_ILIM (addr=0xD0) */

#define DA9210_BUCK_ILIM_SHIFT			0

#define DA9210_BUCK_ILIM_MASK			0x0F

#define DA9210_BUCK_IALARM			0x10



/* DA9210_REG_BUCK_CONF1 (addr=0xD1) */

#define DA9210_BUCK_MODE_SHIFT			0

#define DA9210_BUCK_MODE_MASK			0x03

#define		DA9210_BUCK_MODE_MANUAL		0x00

#define		DA9210_BUCK_MODE_SLEEP		0x01

#define		DA9210_BUCK_MODE_SYNC		0x02

#define		DA9210_BUCK_MODE_AUTO		0x03

#define DA9210_STARTUP_CTRL_SHIFT		2

#define DA9210_STARTUP_CTRL_MASK		0x1C

#define DA9210_PWR_DOWN_CTRL_SHIFT		5

#define DA9210_PWR_DOWN_CTRL_MASK		0xE0



/* DA9210_REG_BUCK_CONF2 (addr=0xD2) */

#define DA9210_PHASE_SEL_SHIFT			0

#define DA9210_PHASE_SEL_MASK			0x03

#define DA9210_FREQ_SEL				0x40



/* DA9210_REG_BUCK_AUTO (addr=0xD4) */

#define DA9210_VBUCK_AUTO_SHIFT			0

#define DA9210_VBUCK_AUTO_MASK			0x7F



/* DA9210_REG_BUCK_BASE (addr=0xD5) */

#define DA9210_VBUCK_BASE_SHIFT			0

#define DA9210_VBUCK_BASE_MASK			0x7F



/* DA9210_REG_VBUCK_MAX_DVC_IF (addr=0xD6) */

#define DA9210_VBUCK_MAX_SHIFT			0

#define DA9210_VBUCK_MAX_MASK			0x7F

#define DA9210_DVC_STEP_SIZE			0x80

#define		DA9210_DVC_STEP_SIZE_10MV	0x00

#define		DA9210_DVC_STEP_SIZE_20MV	0x80



/* DA9210_REG_VBUCK_DVC (addr=0xD7) */

#define DA9210_VBUCK_DVC_SHIFT			0

#define DA9210_VBUCK_DVC_MASK			0x7F



/* DA9210_REG_VBUCK_A/B (addr=0xD8/0xD9) */

#define DA9210_VBUCK_SHIFT			0

#define DA9210_VBUCK_MASK			0x7F

#define DA9210_VBUCK_BIAS			0

#define DA9210_BUCK_SL				0x80



/* DA9210_REG_INTERFACE (addr=0x105) */

#define DA9210_IF_BASE_ADDR_SHIFT		4

#define DA9210_IF_BASE_ADDR_MASK		0xF0



/* DA9210_REG_CONFIG_E (addr=0x147) */

#define DA9210_STAND_ALONE			0x01



#endif	/* __DA9210_REGISTERS_H__ */