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164 lines
4.1 KiB
164 lines
4.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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// |
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// Copyright (c) 2015 MediaTek Inc. |
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// Author: Henry Chen <[email protected]> |
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#include <linux/err.h> |
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#include <linux/gpio.h> |
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#include <linux/i2c.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#include <linux/regulator/driver.h> |
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#include <linux/regulator/machine.h> |
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#include <linux/regulator/of_regulator.h> |
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#include <linux/regulator/mt6311.h> |
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#include <linux/slab.h> |
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#include "mt6311-regulator.h" |
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static const struct regmap_config mt6311_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = MT6311_FQMTR_CON4, |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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/* Default limits measured in millivolts and milliamps */ |
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#define MT6311_MIN_UV 600000 |
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#define MT6311_MAX_UV 1393750 |
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#define MT6311_STEP_UV 6250 |
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static const struct regulator_ops mt6311_buck_ops = { |
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.list_voltage = regulator_list_voltage_linear, |
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.map_voltage = regulator_map_voltage_linear, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.set_voltage_time_sel = regulator_set_voltage_time_sel, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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}; |
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static const struct regulator_ops mt6311_ldo_ops = { |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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}; |
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#define MT6311_BUCK(_id) \ |
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{\ |
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.name = #_id,\ |
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.ops = &mt6311_buck_ops,\ |
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.of_match = of_match_ptr(#_id),\ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.type = REGULATOR_VOLTAGE,\ |
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.id = MT6311_ID_##_id,\ |
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.n_voltages = (MT6311_MAX_UV - MT6311_MIN_UV) / MT6311_STEP_UV + 1,\ |
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.min_uV = MT6311_MIN_UV,\ |
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.uV_step = MT6311_STEP_UV,\ |
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.owner = THIS_MODULE,\ |
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.enable_reg = MT6311_VDVFS11_CON9,\ |
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.enable_mask = MT6311_PMIC_VDVFS11_EN_MASK,\ |
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.vsel_reg = MT6311_VDVFS11_CON12,\ |
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.vsel_mask = MT6311_PMIC_VDVFS11_VOSEL_MASK,\ |
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} |
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#define MT6311_LDO(_id) \ |
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{\ |
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.name = #_id,\ |
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.ops = &mt6311_ldo_ops,\ |
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.of_match = of_match_ptr(#_id),\ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.type = REGULATOR_VOLTAGE,\ |
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.id = MT6311_ID_##_id,\ |
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.owner = THIS_MODULE,\ |
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.enable_reg = MT6311_LDO_CON3,\ |
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.enable_mask = MT6311_PMIC_RG_VBIASN_EN_MASK,\ |
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} |
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static const struct regulator_desc mt6311_regulators[] = { |
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MT6311_BUCK(VDVFS), |
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MT6311_LDO(VBIASN), |
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}; |
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/* |
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* I2C driver interface functions |
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*/ |
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static int mt6311_i2c_probe(struct i2c_client *i2c) |
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{ |
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struct regulator_config config = { }; |
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struct regulator_dev *rdev; |
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struct regmap *regmap; |
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int i, ret; |
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unsigned int data; |
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regmap = devm_regmap_init_i2c(i2c, &mt6311_regmap_config); |
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if (IS_ERR(regmap)) { |
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ret = PTR_ERR(regmap); |
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dev_err(&i2c->dev, "Failed to allocate register map: %d\n", |
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ret); |
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return ret; |
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} |
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ret = regmap_read(regmap, MT6311_SWCID, &data); |
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if (ret < 0) { |
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dev_err(&i2c->dev, "Failed to read DEVICE_ID reg: %d\n", ret); |
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return ret; |
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} |
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switch (data) { |
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case MT6311_E1_CID_CODE: |
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case MT6311_E2_CID_CODE: |
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case MT6311_E3_CID_CODE: |
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break; |
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default: |
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dev_err(&i2c->dev, "Unsupported device id = 0x%x.\n", data); |
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return -ENODEV; |
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} |
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for (i = 0; i < MT6311_MAX_REGULATORS; i++) { |
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config.dev = &i2c->dev; |
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config.regmap = regmap; |
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rdev = devm_regulator_register(&i2c->dev, |
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&mt6311_regulators[i], &config); |
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if (IS_ERR(rdev)) { |
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dev_err(&i2c->dev, |
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"Failed to register MT6311 regulator\n"); |
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return PTR_ERR(rdev); |
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} |
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} |
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return 0; |
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} |
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static const struct i2c_device_id mt6311_i2c_id[] = { |
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{"mt6311", 0}, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(i2c, mt6311_i2c_id); |
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#ifdef CONFIG_OF |
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static const struct of_device_id mt6311_dt_ids[] = { |
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{ .compatible = "mediatek,mt6311-regulator", |
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.data = &mt6311_i2c_id[0] }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, mt6311_dt_ids); |
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#endif |
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static struct i2c_driver mt6311_regulator_driver = { |
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.driver = { |
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.name = "mt6311", |
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.of_match_table = of_match_ptr(mt6311_dt_ids), |
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}, |
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.probe_new = mt6311_i2c_probe, |
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.id_table = mt6311_i2c_id, |
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}; |
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module_i2c_driver(mt6311_regulator_driver); |
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MODULE_AUTHOR("Henry Chen <[email protected]>"); |
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MODULE_DESCRIPTION("Regulator device driver for Mediatek MT6311"); |
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MODULE_LICENSE("GPL v2");
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