diff options
Diffstat (limited to 'drivers/regulator/act8865-regulator.c')
| -rw-r--r-- | drivers/regulator/act8865-regulator.c | 543 |
1 files changed, 543 insertions, 0 deletions
diff --git a/drivers/regulator/act8865-regulator.c b/drivers/regulator/act8865-regulator.c new file mode 100644 index 000000000..2ff73d72c --- /dev/null +++ b/drivers/regulator/act8865-regulator.c @@ -0,0 +1,543 @@ +/* + * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs + * + * http://www.active-semi.com/products/power-management-units/act88xx/ + * + * Copyright (C) 2013 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * 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/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/err.h> +#include <linux/platform_device.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/act8865.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/regulator/of_regulator.h> +#include <linux/regmap.h> + +/* + * ACT8600 Global Register Map. + */ +#define ACT8600_SYS_MODE 0x00 +#define ACT8600_SYS_CTRL 0x01 +#define ACT8600_DCDC1_VSET 0x10 +#define ACT8600_DCDC1_CTRL 0x12 +#define ACT8600_DCDC2_VSET 0x20 +#define ACT8600_DCDC2_CTRL 0x22 +#define ACT8600_DCDC3_VSET 0x30 +#define ACT8600_DCDC3_CTRL 0x32 +#define ACT8600_SUDCDC4_VSET 0x40 +#define ACT8600_SUDCDC4_CTRL 0x41 +#define ACT8600_LDO5_VSET 0x50 +#define ACT8600_LDO5_CTRL 0x51 +#define ACT8600_LDO6_VSET 0x60 +#define ACT8600_LDO6_CTRL 0x61 +#define ACT8600_LDO7_VSET 0x70 +#define ACT8600_LDO7_CTRL 0x71 +#define ACT8600_LDO8_VSET 0x80 +#define ACT8600_LDO8_CTRL 0x81 +#define ACT8600_LDO910_CTRL 0x91 +#define ACT8600_APCH0 0xA1 +#define ACT8600_APCH1 0xA8 +#define ACT8600_APCH2 0xA9 +#define ACT8600_APCH_STAT 0xAA +#define ACT8600_OTG0 0xB0 +#define ACT8600_OTG1 0xB2 + +/* + * ACT8846 Global Register Map. + */ +#define ACT8846_SYS0 0x00 +#define ACT8846_SYS1 0x01 +#define ACT8846_REG1_VSET 0x10 +#define ACT8846_REG1_CTRL 0x12 +#define ACT8846_REG2_VSET0 0x20 +#define ACT8846_REG2_VSET1 0x21 +#define ACT8846_REG2_CTRL 0x22 +#define ACT8846_REG3_VSET0 0x30 +#define ACT8846_REG3_VSET1 0x31 +#define ACT8846_REG3_CTRL 0x32 +#define ACT8846_REG4_VSET0 0x40 +#define ACT8846_REG4_VSET1 0x41 +#define ACT8846_REG4_CTRL 0x42 +#define ACT8846_REG5_VSET 0x50 +#define ACT8846_REG5_CTRL 0x51 +#define ACT8846_REG6_VSET 0x58 +#define ACT8846_REG6_CTRL 0x59 +#define ACT8846_REG7_VSET 0x60 +#define ACT8846_REG7_CTRL 0x61 +#define ACT8846_REG8_VSET 0x68 +#define ACT8846_REG8_CTRL 0x69 +#define ACT8846_REG9_VSET 0x70 +#define ACT8846_REG9_CTRL 0x71 +#define ACT8846_REG10_VSET 0x80 +#define ACT8846_REG10_CTRL 0x81 +#define ACT8846_REG11_VSET 0x90 +#define ACT8846_REG11_CTRL 0x91 +#define ACT8846_REG12_VSET 0xa0 +#define ACT8846_REG12_CTRL 0xa1 +#define ACT8846_REG13_CTRL 0xb1 +#define ACT8846_GLB_OFF_CTRL 0xc3 +#define ACT8846_OFF_SYSMASK 0x18 + +/* + * ACT8865 Global Register Map. + */ +#define ACT8865_SYS_MODE 0x00 +#define ACT8865_SYS_CTRL 0x01 +#define ACT8865_DCDC1_VSET1 0x20 +#define ACT8865_DCDC1_VSET2 0x21 +#define ACT8865_DCDC1_CTRL 0x22 +#define ACT8865_DCDC2_VSET1 0x30 +#define ACT8865_DCDC2_VSET2 0x31 +#define ACT8865_DCDC2_CTRL 0x32 +#define ACT8865_DCDC3_VSET1 0x40 +#define ACT8865_DCDC3_VSET2 0x41 +#define ACT8865_DCDC3_CTRL 0x42 +#define ACT8865_LDO1_VSET 0x50 +#define ACT8865_LDO1_CTRL 0x51 +#define ACT8865_LDO2_VSET 0x54 +#define ACT8865_LDO2_CTRL 0x55 +#define ACT8865_LDO3_VSET 0x60 +#define ACT8865_LDO3_CTRL 0x61 +#define ACT8865_LDO4_VSET 0x64 +#define ACT8865_LDO4_CTRL 0x65 +#define ACT8865_MSTROFF 0x20 + +/* + * Field Definitions. + */ +#define ACT8865_ENA 0x80 /* ON - [7] */ +#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */ + + +#define ACT8600_LDO10_ENA 0x40 /* ON - [6] */ +#define ACT8600_SUDCDC_VSEL_MASK 0xFF /* SUDCDC VSET - [7:0] */ + +/* + * ACT8865 voltage number + */ +#define ACT8865_VOLTAGE_NUM 64 +#define ACT8600_SUDCDC_VOLTAGE_NUM 255 + +struct act8865 { + struct regmap *regmap; + int off_reg; + int off_mask; +}; + +static const struct regmap_config act8865_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static const struct regulator_linear_range act8865_voltage_ranges[] = { + REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), + REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), + REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), +}; + +static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = { + REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0), + REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000), + REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000), + REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000), +}; + +static struct regulator_ops act8865_ops = { + .list_voltage = regulator_list_voltage_linear_range, + .map_voltage = regulator_map_voltage_linear_range, + .get_voltage_sel = regulator_get_voltage_sel_regmap, + .set_voltage_sel = regulator_set_voltage_sel_regmap, + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +static struct regulator_ops act8865_ldo_ops = { + .enable = regulator_enable_regmap, + .disable = regulator_disable_regmap, + .is_enabled = regulator_is_enabled_regmap, +}; + +#define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply) \ + [_family##_ID_##_id] = { \ + .name = _name, \ + .supply_name = _supply, \ + .id = _family##_ID_##_id, \ + .type = REGULATOR_VOLTAGE, \ + .ops = &act8865_ops, \ + .n_voltages = ACT8865_VOLTAGE_NUM, \ + .linear_ranges = act8865_voltage_ranges, \ + .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \ + .vsel_reg = _family##_##_id##_##_vsel_reg, \ + .vsel_mask = ACT8865_VSEL_MASK, \ + .enable_reg = _family##_##_id##_CTRL, \ + .enable_mask = ACT8865_ENA, \ + .owner = THIS_MODULE, \ + } + +static const struct regulator_desc act8600_regulators[] = { + ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"), + ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"), + ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"), + { + .name = "SUDCDC_REG4", + .id = ACT8600_ID_SUDCDC4, + .ops = &act8865_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM, + .linear_ranges = act8600_sudcdc_voltage_ranges, + .n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges), + .vsel_reg = ACT8600_SUDCDC4_VSET, + .vsel_mask = ACT8600_SUDCDC_VSEL_MASK, + .enable_reg = ACT8600_SUDCDC4_CTRL, + .enable_mask = ACT8865_ENA, + .owner = THIS_MODULE, + }, + ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"), + ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"), + ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"), + ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"), + { + .name = "LDO_REG9", + .id = ACT8600_ID_LDO9, + .ops = &act8865_ldo_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = 1, + .fixed_uV = 1800000, + .enable_reg = ACT8600_LDO910_CTRL, + .enable_mask = ACT8865_ENA, + .owner = THIS_MODULE, + }, + { + .name = "LDO_REG10", + .id = ACT8600_ID_LDO10, + .ops = &act8865_ldo_ops, + .type = REGULATOR_VOLTAGE, + .n_voltages = 1, + .fixed_uV = 1200000, + .enable_reg = ACT8600_LDO910_CTRL, + .enable_mask = ACT8600_LDO10_ENA, + .owner = THIS_MODULE, + }, +}; + +static const struct regulator_desc act8846_regulators[] = { + ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"), + ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"), + ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"), + ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"), + ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"), + ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"), + ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"), + ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"), + ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"), + ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"), + ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"), + ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"), +}; + +static const struct regulator_desc act8865_regulators[] = { + ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"), + ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"), + ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"), + ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"), + ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"), + ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"), + ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"), +}; + +#ifdef CONFIG_OF +static const struct of_device_id act8865_dt_ids[] = { + { .compatible = "active-semi,act8600", .data = (void *)ACT8600 }, + { .compatible = "active-semi,act8846", .data = (void *)ACT8846 }, + { .compatible = "active-semi,act8865", .data = (void *)ACT8865 }, + { } +}; +MODULE_DEVICE_TABLE(of, act8865_dt_ids); + +static struct of_regulator_match act8846_matches[] = { + [ACT8846_ID_REG1] = { .name = "REG1" }, + [ACT8846_ID_REG2] = { .name = "REG2" }, + [ACT8846_ID_REG3] = { .name = "REG3" }, + [ACT8846_ID_REG4] = { .name = "REG4" }, + [ACT8846_ID_REG5] = { .name = "REG5" }, + [ACT8846_ID_REG6] = { .name = "REG6" }, + [ACT8846_ID_REG7] = { .name = "REG7" }, + [ACT8846_ID_REG8] = { .name = "REG8" }, + [ACT8846_ID_REG9] = { .name = "REG9" }, + [ACT8846_ID_REG10] = { .name = "REG10" }, + [ACT8846_ID_REG11] = { .name = "REG11" }, + [ACT8846_ID_REG12] = { .name = "REG12" }, +}; + +static struct of_regulator_match act8865_matches[] = { + [ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"}, + [ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"}, + [ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"}, + [ACT8865_ID_LDO1] = { .name = "LDO_REG1"}, + [ACT8865_ID_LDO2] = { .name = "LDO_REG2"}, + [ACT8865_ID_LDO3] = { .name = "LDO_REG3"}, + [ACT8865_ID_LDO4] = { .name = "LDO_REG4"}, +}; + +static struct of_regulator_match act8600_matches[] = { + [ACT8600_ID_DCDC1] = { .name = "DCDC_REG1"}, + [ACT8600_ID_DCDC2] = { .name = "DCDC_REG2"}, + [ACT8600_ID_DCDC3] = { .name = "DCDC_REG3"}, + [ACT8600_ID_SUDCDC4] = { .name = "SUDCDC_REG4"}, + [ACT8600_ID_LDO5] = { .name = "LDO_REG5"}, + [ACT8600_ID_LDO6] = { .name = "LDO_REG6"}, + [ACT8600_ID_LDO7] = { .name = "LDO_REG7"}, + [ACT8600_ID_LDO8] = { .name = "LDO_REG8"}, + [ACT8600_ID_LDO9] = { .name = "LDO_REG9"}, + [ACT8600_ID_LDO10] = { .name = "LDO_REG10"}, +}; + +static int act8865_pdata_from_dt(struct device *dev, + struct device_node **of_node, + struct act8865_platform_data *pdata, + unsigned long type) +{ + int matched, i, num_matches; + struct device_node *np; + struct act8865_regulator_data *regulator; + struct of_regulator_match *matches; + + np = of_get_child_by_name(dev->of_node, "regulators"); + if (!np) { + dev_err(dev, "missing 'regulators' subnode in DT\n"); + return -EINVAL; + } + + switch (type) { + case ACT8600: + matches = act8600_matches; + num_matches = ARRAY_SIZE(act8600_matches); + break; + case ACT8846: + matches = act8846_matches; + num_matches = ARRAY_SIZE(act8846_matches); + break; + case ACT8865: + matches = act8865_matches; + num_matches = ARRAY_SIZE(act8865_matches); + break; + default: + dev_err(dev, "invalid device id %lu\n", type); + return -EINVAL; + } + + matched = of_regulator_match(dev, np, matches, num_matches); + of_node_put(np); + if (matched <= 0) + return matched; + + pdata->regulators = devm_kzalloc(dev, + sizeof(struct act8865_regulator_data) * + num_matches, GFP_KERNEL); + if (!pdata->regulators) + return -ENOMEM; + + pdata->num_regulators = num_matches; + regulator = pdata->regulators; + + for (i = 0; i < num_matches; i++) { + regulator->id = i; + regulator->name = matches[i].name; + regulator->platform_data = matches[i].init_data; + of_node[i] = matches[i].of_node; + regulator++; + } + + return 0; +} +#else +static inline int act8865_pdata_from_dt(struct device *dev, + struct device_node **of_node, + struct act8865_platform_data *pdata, + unsigned long type) +{ + return 0; +} +#endif + +static struct regulator_init_data +*act8865_get_init_data(int id, struct act8865_platform_data *pdata) +{ + int i; + + if (!pdata) + return NULL; + + for (i = 0; i < pdata->num_regulators; i++) { + if (pdata->regulators[i].id == id) + return pdata->regulators[i].platform_data; + } + + return NULL; +} + +static struct i2c_client *act8865_i2c_client; +static void act8865_power_off(void) +{ + struct act8865 *act8865; + + act8865 = i2c_get_clientdata(act8865_i2c_client); + regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask); + while (1); +} + +static int act8865_pmic_probe(struct i2c_client *client, + const struct i2c_device_id *i2c_id) +{ + static const struct regulator_desc *regulators; + struct act8865_platform_data pdata_of, *pdata; + struct device *dev = &client->dev; + struct device_node **of_node; + int i, ret, num_regulators; + struct act8865 *act8865; + unsigned long type; + int off_reg, off_mask; + + pdata = dev_get_platdata(dev); + + if (dev->of_node && !pdata) { + const struct of_device_id *id; + + id = of_match_device(of_match_ptr(act8865_dt_ids), dev); + if (!id) + return -ENODEV; + + type = (unsigned long) id->data; + } else { + type = i2c_id->driver_data; + } + + switch (type) { + case ACT8600: + regulators = act8600_regulators; + num_regulators = ARRAY_SIZE(act8600_regulators); + off_reg = -1; + off_mask = -1; + break; + case ACT8846: + regulators = act8846_regulators; + num_regulators = ARRAY_SIZE(act8846_regulators); + off_reg = ACT8846_GLB_OFF_CTRL; + off_mask = ACT8846_OFF_SYSMASK; + break; + case ACT8865: + regulators = act8865_regulators; + num_regulators = ARRAY_SIZE(act8865_regulators); + off_reg = ACT8865_SYS_CTRL; + off_mask = ACT8865_MSTROFF; + break; + default: + dev_err(dev, "invalid device id %lu\n", type); + return -EINVAL; + } + + of_node = devm_kzalloc(dev, sizeof(struct device_node *) * + num_regulators, GFP_KERNEL); + if (!of_node) + return -ENOMEM; + + if (dev->of_node && !pdata) { + ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type); + if (ret < 0) + return ret; + + pdata = &pdata_of; + } + + if (pdata->num_regulators > num_regulators) { + dev_err(dev, "too many regulators: %d\n", + pdata->num_regulators); + return -EINVAL; + } + + act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL); + if (!act8865) + return -ENOMEM; + + act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config); + if (IS_ERR(act8865->regmap)) { + ret = PTR_ERR(act8865->regmap); + dev_err(&client->dev, "Failed to allocate register map: %d\n", + ret); + return ret; + } + + if (of_device_is_system_power_controller(dev->of_node)) { + if (!pm_power_off && (off_reg > 0)) { + act8865_i2c_client = client; + act8865->off_reg = off_reg; + act8865->off_mask = off_mask; + pm_power_off = act8865_power_off; + } else { + dev_err(dev, "Failed to set poweroff capability, already defined\n"); + } + } + + /* Finally register devices */ + for (i = 0; i < num_regulators; i++) { + const struct regulator_desc *desc = ®ulators[i]; + struct regulator_config config = { }; + struct regulator_dev *rdev; + + config.dev = dev; + config.init_data = act8865_get_init_data(desc->id, pdata); + config.of_node = of_node[i]; + config.driver_data = act8865; + config.regmap = act8865->regmap; + + rdev = devm_regulator_register(&client->dev, desc, &config); + if (IS_ERR(rdev)) { + dev_err(dev, "failed to register %s\n", desc->name); + return PTR_ERR(rdev); + } + } + + i2c_set_clientdata(client, act8865); + devm_kfree(dev, of_node); + + return 0; +} + +static const struct i2c_device_id act8865_ids[] = { + { .name = "act8600", .driver_data = ACT8600 }, + { .name = "act8846", .driver_data = ACT8846 }, + { .name = "act8865", .driver_data = ACT8865 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, act8865_ids); + +static struct i2c_driver act8865_pmic_driver = { + .driver = { + .name = "act8865", + .owner = THIS_MODULE, + }, + .probe = act8865_pmic_probe, + .id_table = act8865_ids, +}; + +module_i2c_driver(act8865_pmic_driver); + +MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver"); +MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); +MODULE_LICENSE("GPL v2"); |