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

Commit 8766018b authored by Henry Chen's avatar Henry Chen Committed by Mark Brown
Browse files

regulator: mt6311: Add support for mt6311 regulator 



Add regulator support for mt6311.
It has 2 regulaotrs - Buck and LDO, provide the related buck/ldo voltage
data to the driver, and creates the regulator_desc table. Supported
operations for Buck are enabled/disabled and voltage change, only
enabled/disabled for LDO.

Signed-off-by: default avatarHenry Chen <henryc.chen@mediatek.com>
Reviewed-by: default avatarJavier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 678cdb2f

drivers/regulator/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -451,6 +451,15 @@ config REGULATOR_MC13892 
	  Say y here to support the regulators found on the Freescale MC13892

	  PMIC.



config REGULATOR_MT6311

	tristate "MediaTek MT6311 PMIC"

	depends on I2C

	help

	  Say y here to select this option to enable the power regulator of

	  MediaTek MT6311 PMIC.

	  This driver supports the control of different power rails of device

	  through regulator interface.



config REGULATOR_MT6397

	tristate "MediaTek MT6397 PMIC"

	depends on MFD_MT6397

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -60,6 +60,7 @@ obj-$(CONFIG_REGULATOR_MAX77843) += max77843.o 
obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o

obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o

obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o

obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o

obj-$(CONFIG_REGULATOR_MT6397)	+= mt6397-regulator.o

obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o

obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o

drivers/regulator/mt6311-regulator.c

0 → 100644
+180 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2015 MediaTek Inc.

 * Author: Henry Chen <henryc.chen@mediatek.com>

 *

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

 * it under the terms of the GNU General Public License 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.

 */



#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/i2c.h>

#include <linux/init.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regulator/mt6311.h>

#include <linux/slab.h>

#include "mt6311-regulator.h"



static const struct regmap_config mt6311_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = MT6311_FQMTR_CON4,

};



/* Default limits measured in millivolts and milliamps */

#define MT6311_MIN_UV		600000

#define MT6311_MAX_UV		1400000

#define MT6311_STEP_UV		6250



static const struct regulator_linear_range buck_volt_range[] = {

	REGULATOR_LINEAR_RANGE(MT6311_MIN_UV, 0, 0x7f, MT6311_STEP_UV),

};



static struct regulator_ops mt6311_buck_ops = {

	.list_voltage = regulator_list_voltage_linear_range,

	.map_voltage = regulator_map_voltage_linear_range,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_time_sel = regulator_set_voltage_time_sel,

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

};



static struct regulator_ops mt6311_ldo_ops = {

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

};



#define MT6311_BUCK(_id) \

{\

	.name = #_id,\

	.ops = &mt6311_buck_ops,\

	.of_match = of_match_ptr(#_id),\

	.regulators_node = of_match_ptr("regulators"),\

	.type = REGULATOR_VOLTAGE,\

	.id = MT6311_ID_##_id,\

	.n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1,\

	.min_uV = MT6311_MIN_UV,\

	.uV_step = MT6311_STEP_UV,\

	.owner = THIS_MODULE,\

	.linear_ranges = buck_volt_range, \

	.n_linear_ranges = ARRAY_SIZE(buck_volt_range), \

	.enable_reg = MT6311_VDVFS11_CON9,\

	.enable_mask = MT6311_PMIC_VDVFS11_EN_MASK,\

	.vsel_reg = MT6311_VDVFS11_CON12,\

	.vsel_mask = MT6311_PMIC_VDVFS11_VOSEL_MASK,\

}



#define MT6311_LDO(_id) \

{\

	.name = #_id,\

	.ops = &mt6311_ldo_ops,\

	.of_match = of_match_ptr(#_id),\

	.regulators_node = of_match_ptr("regulators"),\

	.type = REGULATOR_VOLTAGE,\

	.id = MT6311_ID_##_id,\

	.owner = THIS_MODULE,\

	.enable_reg = MT6311_LDO_CON3,\

	.enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\

}



static struct regulator_desc mt6311_regulators[] = {

	MT6311_BUCK(VDVFS),

	MT6311_LDO(VBIASN),

};



/*

 * I2C driver interface functions

 */

static int mt6311_i2c_probe(struct i2c_client *i2c,

		const struct i2c_device_id *id)

{

	struct regulator_config config = { };

	struct regulator_dev *rdev;

	struct regmap *regmap;

	int error, i, ret;

	unsigned int data;



	regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config);

	if (IS_ERR(regmap)) {

		error = PTR_ERR(regmap);

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

			error);

		return error;

	}



	ret = regmap_read(regmap, MT6311_SWCID, &data);

	if (ret < 0) {

		dev_err(&i2c->dev, "Failed to read DEVICE_ID reg: %d\n", ret);

		return ret;

	}



	switch (data) {

	case MT6311_E1_CID_CODE:

	case MT6311_E2_CID_CODE:

	case MT6311_E3_CID_CODE:

		break;

	default:

		dev_err(&i2c->dev, "Unsupported device id = 0x%x.\n", data);

		return -ENODEV;

	}



	for (i = 0; i < MT6311_MAX_REGULATORS; i++) {

		config.dev = &i2c->dev;

		config.regmap = regmap;



		rdev = devm_regulator_register(&i2c->dev,

			&mt6311_regulators[i], &config);

		if (IS_ERR(rdev)) {

			dev_err(&i2c->dev,

				"Failed to register MT6311 regulator\n");

			return PTR_ERR(rdev);

		}

	}



	return 0;

}



static const struct i2c_device_id mt6311_i2c_id[] = {

	{"mt6311", 0},

	{},

};

MODULE_DEVICE_TABLE(i2c, mt6311_i2c_id);



#ifdef CONFIG_OF

static const struct of_device_id mt6311_dt_ids[] = {

	{ .compatible = "mediatek,mt6311-regulator",

	  .data = &mt6311_i2c_id[0] },

	{},

};

MODULE_DEVICE_TABLE(of, mt6311_dt_ids);

#endif



static struct i2c_driver mt6311_regulator_driver = {

	.driver = {

		.name = "mt6311",

		.owner = THIS_MODULE,

		.of_match_table = of_match_ptr(mt6311_dt_ids),

	},

	.probe = mt6311_i2c_probe,

	.id_table = mt6311_i2c_id,

};



module_i2c_driver(mt6311_regulator_driver);



MODULE_AUTHOR("Henry Chen <henryc.chen@mediatek.com>");

MODULE_DESCRIPTION("Regulator device driver for Mediatek MT6311");

MODULE_LICENSE("GPL v2");

drivers/regulator/mt6311-regulator.h

0 → 100644
+65 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2015 MediaTek Inc.

 * Author: Henry Chen <henryc.chen@mediatek.com>

 *

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

 * it under the terms of the GNU General Public License 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 __MT6311_REGULATOR_H__

#define __MT6311_REGULATOR_H__



#define MT6311_SWCID              0x01



#define MT6311_TOP_INT_CON        0x18

#define MT6311_TOP_INT_MON        0x19



#define MT6311_VDVFS11_CON0       0x87

#define MT6311_VDVFS11_CON7       0x88

#define MT6311_VDVFS11_CON8       0x89

#define MT6311_VDVFS11_CON9       0x8A

#define MT6311_VDVFS11_CON10      0x8B

#define MT6311_VDVFS11_CON11      0x8C

#define MT6311_VDVFS11_CON12      0x8D

#define MT6311_VDVFS11_CON13      0x8E

#define MT6311_VDVFS11_CON14      0x8F

#define MT6311_VDVFS11_CON15      0x90

#define MT6311_VDVFS11_CON16      0x91

#define MT6311_VDVFS11_CON17      0x92

#define MT6311_VDVFS11_CON18      0x93

#define MT6311_VDVFS11_CON19      0x94



#define MT6311_LDO_CON0           0xCC

#define MT6311_LDO_OCFB0          0xCD

#define MT6311_LDO_CON2           0xCE

#define MT6311_LDO_CON3           0xCF

#define MT6311_LDO_CON4           0xD0

#define MT6311_FQMTR_CON0         0xD1

#define MT6311_FQMTR_CON1         0xD2

#define MT6311_FQMTR_CON2         0xD3

#define MT6311_FQMTR_CON3         0xD4

#define MT6311_FQMTR_CON4         0xD5



#define MT6311_PMIC_RG_INT_POL_MASK                      0x1

#define MT6311_PMIC_RG_INT_EN_MASK                       0x2

#define MT6311_PMIC_RG_BUCK_OC_INT_STATUS_MASK           0x10



#define MT6311_PMIC_VDVFS11_EN_CTRL_MASK                 0x1

#define MT6311_PMIC_VDVFS11_VOSEL_CTRL_MASK              0x2

#define MT6311_PMIC_VDVFS11_EN_SEL_MASK                  0x3

#define MT6311_PMIC_VDVFS11_VOSEL_SEL_MASK               0xc

#define MT6311_PMIC_VDVFS11_EN_MASK                      0x1

#define MT6311_PMIC_VDVFS11_VOSEL_MASK                   0x7F

#define MT6311_PMIC_VDVFS11_VOSEL_ON_MASK                0x7F

#define MT6311_PMIC_VDVFS11_VOSEL_SLEEP_MASK             0x7F

#define MT6311_PMIC_NI_VDVFS11_VOSEL_MASK                0x7F



#define MT6311_PMIC_RG_VBIASN_EN_MASK                    0x1



#endif

include/linux/regulator/mt6311.h

0 → 100644
+29 −0
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2015 MediaTek Inc.

 * Author: Henry Chen <henryc.chen@mediatek.com>

 *

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

 * it under the terms of the GNU General Public License 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_MT6311_H

#define __LINUX_REGULATOR_MT6311_H



#define MT6311_MAX_REGULATORS	2



enum {

	MT6311_ID_VDVFS = 0,

	MT6311_ID_VBIASN,

};



#define MT6311_E1_CID_CODE    0x10

#define MT6311_E2_CID_CODE    0x20

#define MT6311_E3_CID_CODE    0x30



#endif /* __LINUX_REGULATOR_MT6311_H */