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regulator: mt6311: Add support for mt6311 regulator

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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: Henry Chen <henryc.chen@mediatek.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Henry Chen 2015-07-24 13:24:41 +08:00 committed by Mark Brown
parent 678cdb2fbd
commit 8766018b6e
5 changed files with 284 additions and 0 deletions
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9
drivers/regulator/Kconfig
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@ -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

1
drivers/regulator/Makefile
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@ -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

180
drivers/regulator/mt6311-regulator.c Normal file
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@ -0,0 +1,180 @@
/*
* 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");

65
drivers/regulator/mt6311-regulator.h Normal file
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@ -0,0 +1,65 @@
/*
* 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

29
include/linux/regulator/mt6311.h Normal file
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@ -0,0 +1,29 @@
/*
* 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 */