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    Subject[PATCH v4 2/2] regulator: mt6311: Add support for mt6311 regulator
    Date
    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>
    ---
    drivers/regulator/Kconfig | 9 ++
    drivers/regulator/Makefile | 1 +
    drivers/regulator/mt6311-regulator.c | 180 +++++++++++++++++++++++++++++++++++
    drivers/regulator/mt6311-regulator.h | 65 +++++++++++++
    include/linux/regulator/mt6311.h | 29 ++++++
    5 files changed, 284 insertions(+)
    create mode 100644 drivers/regulator/mt6311-regulator.c
    create mode 100644 drivers/regulator/mt6311-regulator.h
    create mode 100644 include/linux/regulator/mt6311.h

    diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
    index bef3bde..aab09ac 100644
    --- a/drivers/regulator/Kconfig
    +++ b/drivers/regulator/Kconfig
    @@ -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
    diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
    index 91bf762..45e790f 100644
    --- a/drivers/regulator/Makefile
    +++ b/drivers/regulator/Makefile
    @@ -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
    diff --git a/drivers/regulator/mt6311-regulator.c b/drivers/regulator/mt6311-regulator.c
    new file mode 100644
    index 0000000..096e620
    --- /dev/null
    +++ b/drivers/regulator/mt6311-regulator.c
    @@ -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");
    diff --git a/drivers/regulator/mt6311-regulator.h b/drivers/regulator/mt6311-regulator.h
    new file mode 100644
    index 0000000..5218db4
    --- /dev/null
    +++ b/drivers/regulator/mt6311-regulator.h
    @@ -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
    diff --git a/include/linux/regulator/mt6311.h b/include/linux/regulator/mt6311.h
    new file mode 100644
    index 0000000..8473259
    --- /dev/null
    +++ b/include/linux/regulator/mt6311.h
    @@ -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 */
    --
    1.8.1.1.dirty


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