[PATCH 2/2] regulator: MT6311: Add support for MT6311 regulator
Henry Chen
henryc.chen at mediatek.com
Mon Jul 20 00:36:33 PDT 2015
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 at mediatek.com>
---
drivers/regulator/Kconfig | 9 ++
drivers/regulator/Makefile | 1 +
drivers/regulator/mt6311-regulator.c | 272 +++++++++++++++++++++++++++++++++++
drivers/regulator/mt6311-regulator.h | 65 +++++++++
include/linux/regulator/mt6311.h | 39 +++++
5 files changed, 386 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..31bb2b5 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -460,6 +460,15 @@ config REGULATOR_MT6397
This driver supports the control of different power rails of device
through regulator interface.
+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_PALMAS
tristate "TI Palmas PMIC Regulators"
depends on MFD_PALMAS
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 91bf762..2b50fb6 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -61,6 +61,7 @@ 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_MT6397) += mt6397-regulator.o
+obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o
obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
diff --git a/drivers/regulator/mt6311-regulator.c b/drivers/regulator/mt6311-regulator.c
new file mode 100644
index 0000000..ee969d6
--- /dev/null
+++ b/drivers/regulator/mt6311-regulator.c
@@ -0,0 +1,272 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Henry Chen <henryc.chen at 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"
+
+struct mt6311 {
+ struct device *dev;
+ struct regmap *regmap;
+ struct mt6311_pdata *pdata;
+ struct regulator_dev *rdev[MT6311_MAX_REGULATORS];
+ int num_regulator;
+ int chip_cid;
+};
+
+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,\
+ .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,\
+ .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),
+};
+
+#ifdef CONFIG_OF
+static struct of_regulator_match mt6311_matches[] = {
+ [MT6311_ID_VDVFS] = { .name = "VDVFS" },
+ [MT6311_ID_VBIASN] = { .name = "VBIASN" },
+};
+
+static struct mt6311_pdata *mt6311_parse_regulators_dt(
+ struct device *dev)
+{
+ struct mt6311_pdata *pdata;
+ struct device_node *node;
+ int i, num, n;
+
+ node = of_get_child_by_name(dev->of_node, "regulators");
+ if (!node) {
+ dev_err(dev, "regulators node not found\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ num = of_regulator_match(dev, node, mt6311_matches,
+ ARRAY_SIZE(mt6311_matches));
+ of_node_put(node);
+ if (num < 0) {
+ dev_err(dev, "Failed to match regulators\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->num_buck = num;
+ n = 0;
+ for (i = 0; i < ARRAY_SIZE(mt6311_matches); i++) {
+ if (!mt6311_matches[i].init_data)
+ continue;
+
+ pdata->init_data[n] = mt6311_matches[i].init_data;
+ pdata->reg_node[n] = mt6311_matches[i].of_node;
+
+ n++;
+ }
+
+ return pdata;
+}
+#else
+static struct mt6311_pdata *mt6311_parse_regulators_dt(
+ struct device *dev)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
+static int mt6311_regulator_init(struct mt6311 *chip)
+{
+ struct regulator_config config = { };
+ int i;
+
+ chip->num_regulator = chip->pdata->num_buck;
+
+ for (i = 0; i < chip->num_regulator; i++) {
+ config.init_data = chip->pdata->init_data[i];
+ config.dev = chip->dev;
+ config.driver_data = chip;
+ config.regmap = chip->regmap;
+ config.of_node = chip->pdata->reg_node[i];
+
+ chip->rdev[i] = devm_regulator_register(chip->dev,
+ &mt6311_regulators[i], &config);
+ if (IS_ERR(chip->rdev[i])) {
+ dev_err(chip->dev,
+ "Failed to register MT6311 regulator\n");
+ return PTR_ERR(chip->rdev[i]);
+ }
+ }
+
+ return 0;
+}
+
+/*
+ * I2C driver interface functions
+ */
+static int mt6311_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct mt6311 *chip;
+ int error, ret;
+ unsigned int data;
+
+ chip = devm_kzalloc(&i2c->dev, sizeof(struct mt6311), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
+
+ chip->dev = &i2c->dev;
+ chip->regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config);
+ if (IS_ERR(chip->regmap)) {
+ error = PTR_ERR(chip->regmap);
+ dev_err(chip->dev, "Failed to allocate register map: %d\n",
+ error);
+ return error;
+ }
+
+ i2c_set_clientdata(i2c, chip);
+
+ chip->pdata = i2c->dev.platform_data;
+
+ ret = regmap_read(chip->regmap, MT6311_SWCID, &data);
+ if (ret < 0) {
+ dev_err(chip->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:
+ chip->chip_cid = data;
+ break;
+ default:
+ dev_err(chip->dev, "Unsupported device id = 0x%x.\n", data);
+ return -ENODEV;
+ }
+
+ if (!chip->pdata)
+ chip->pdata = mt6311_parse_regulators_dt(chip->dev);
+
+ if (IS_ERR(chip->pdata)) {
+ dev_err(chip->dev, "No regulators defined for the platform\n");
+ return PTR_ERR(chip->pdata);
+ }
+
+ ret = mt6311_regulator_init(chip);
+
+ if (ret < 0)
+ dev_err(chip->dev, "Failed to initialize regulator: %d\n", ret);
+
+ return ret;
+}
+
+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 at 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 at 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..4d8f54c
--- /dev/null
+++ b/include/linux/regulator/mt6311.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Henry Chen <henryc.chen at 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,
+};
+
+struct mt6311_pdata {
+ /*
+ * 1 : 2 phase buck
+ * 2 : ldo
+ */
+ int num_buck;
+ struct device_node *reg_node[MT6311_MAX_REGULATORS];
+ struct regulator_init_data *init_data[MT6311_MAX_REGULATORS];
+};
+
+#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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