/* * tps6507x-regulator.c * * Regulator driver for TPS65073 PMIC * * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/ * * 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 version 2. * * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind, * whether express or implied; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/i2c.h> #include <linux/delay.h> /* Register definitions */ #define TPS6507X_REG_PPATH1 0X01 #define TPS6507X_REG_INT 0X02 #define TPS6507X_REG_CHGCONFIG0 0X03 #define TPS6507X_REG_CHGCONFIG1 0X04 #define TPS6507X_REG_CHGCONFIG2 0X05 #define TPS6507X_REG_CHGCONFIG3 0X06 #define TPS6507X_REG_REG_ADCONFIG 0X07 #define TPS6507X_REG_TSCMODE 0X08 #define TPS6507X_REG_ADRESULT_1 0X09 #define TPS6507X_REG_ADRESULT_2 0X0A #define TPS6507X_REG_PGOOD 0X0B #define TPS6507X_REG_PGOODMASK 0X0C #define TPS6507X_REG_CON_CTRL1 0X0D #define TPS6507X_REG_CON_CTRL2 0X0E #define TPS6507X_REG_CON_CTRL3 0X0F #define TPS6507X_REG_DEFDCDC1 0X10 #define TPS6507X_REG_DEFDCDC2_LOW 0X11 #define TPS6507X_REG_DEFDCDC2_HIGH 0X12 #define TPS6507X_REG_DEFDCDC3_LOW 0X13 #define TPS6507X_REG_DEFDCDC3_HIGH 0X14 #define TPS6507X_REG_DEFSLEW 0X15 #define TPS6507X_REG_LDO_CTRL1 0X16 #define TPS6507X_REG_DEFLDO2 0X17 #define TPS6507X_REG_WLED_CTRL1 0X18 #define TPS6507X_REG_WLED_CTRL2 0X19 /* CON_CTRL1 bitfields */ #define TPS6507X_CON_CTRL1_DCDC1_ENABLE BIT(4) #define TPS6507X_CON_CTRL1_DCDC2_ENABLE BIT(3) #define TPS6507X_CON_CTRL1_DCDC3_ENABLE BIT(2) #define TPS6507X_CON_CTRL1_LDO1_ENABLE BIT(1) #define TPS6507X_CON_CTRL1_LDO2_ENABLE BIT(0) /* DEFDCDC1 bitfields */ #define TPS6507X_DEFDCDC1_DCDC1_EXT_ADJ_EN BIT(7) #define TPS6507X_DEFDCDC1_DCDC1_MASK 0X3F /* DEFDCDC2_LOW bitfields */ #define TPS6507X_DEFDCDC2_LOW_DCDC2_MASK 0X3F /* DEFDCDC2_HIGH bitfields */ #define TPS6507X_DEFDCDC2_HIGH_DCDC2_MASK 0X3F /* DEFDCDC3_LOW bitfields */ #define TPS6507X_DEFDCDC3_LOW_DCDC3_MASK 0X3F /* DEFDCDC3_HIGH bitfields */ #define TPS6507X_DEFDCDC3_HIGH_DCDC3_MASK 0X3F /* TPS6507X_REG_LDO_CTRL1 bitfields */ #define TPS6507X_REG_LDO_CTRL1_LDO1_MASK 0X0F /* TPS6507X_REG_DEFLDO2 bitfields */ #define TPS6507X_REG_DEFLDO2_LDO2_MASK 0X3F /* VDCDC MASK */ #define TPS6507X_DEFDCDCX_DCDC_MASK 0X3F /* DCDC's */ #define TPS6507X_DCDC_1 0 #define TPS6507X_DCDC_2 1 #define TPS6507X_DCDC_3 2 /* LDOs */ #define TPS6507X_LDO_1 3 #define TPS6507X_LDO_2 4 #define TPS6507X_MAX_REG_ID TPS6507X_LDO_2 /* Number of step-down converters available */ #define TPS6507X_NUM_DCDC 3 /* Number of LDO voltage regulators available */ #define TPS6507X_NUM_LDO 2 /* Number of total regulators available */ #define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO) /* Supported voltage values for regulators (in milliVolts) */ static const u16 VDCDCx_VSEL_table[] = { 725, 750, 775, 800, 825, 850, 875, 900, 925, 950, 975, 1000, 1025, 1050, 1075, 1100, 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300, 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500, 1550, 1600, 1650, 1700, 1750, 1800, 1850, 1900, 1950, 2000, 2050, 2100, 2150, 2200, 2250, 2300, 2350, 2400, 2450, 2500, 2550, 2600, 2650, 2700, 2750, 2800, 2850, 2900, 3000, 3100, 3200, 3300, }; static const u16 LDO1_VSEL_table[] = { 1000, 1100, 1200, 1250, 1300, 1350, 1400, 1500, 1600, 1800, 2500, 2750, 2800, 3000, 3100, 3300, }; static const u16 LDO2_VSEL_table[] = { 725, 750, 775, 800, 825, 850, 875, 900, 925, 950, 975, 1000, 1025, 1050, 1075, 1100, 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300, 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500, 1550, 1600, 1650, 1700, 1750, 1800, 1850, 1900, 1950, 2000, 2050, 2100, 2150, 2200, 2250, 2300, 2350, 2400, 2450, 2500, 2550, 2600, 2650, 2700, 2750, 2800, 2850, 2900, 3000, 3100, 3200, 3300, }; static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table), ARRAY_SIZE(VDCDCx_VSEL_table), ARRAY_SIZE(VDCDCx_VSEL_table), ARRAY_SIZE(LDO1_VSEL_table), ARRAY_SIZE(LDO2_VSEL_table)}; struct tps_info { const char *name; unsigned min_uV; unsigned max_uV; u8 table_len; const u16 *table; }; struct tps_pmic { struct regulator_desc desc[TPS6507X_NUM_REGULATOR]; struct i2c_client *client; struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR]; const struct tps_info *info[TPS6507X_NUM_REGULATOR]; struct mutex io_lock; }; static inline int tps_6507x_read(struct tps_pmic *tps, u8 reg) { return i2c_smbus_read_byte_data(tps->client, reg); } static inline int tps_6507x_write(struct tps_pmic *tps, u8 reg, u8 val) { return i2c_smbus_write_byte_data(tps->client, reg, val); } static int tps_6507x_set_bits(struct tps_pmic *tps, u8 reg, u8 mask) { int err, data; mutex_lock(&tps->io_lock); data = tps_6507x_read(tps, reg); if (data < 0) { dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg); err = data; goto out; } data |= mask; err = tps_6507x_write(tps, reg, data); if (err) dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg); out: mutex_unlock(&tps->io_lock); return err; } static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask) { int err, data; mutex_lock(&tps->io_lock); data = tps_6507x_read(tps, reg); if (data < 0) { dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg); err = data; goto out; } data &= ~mask; err = tps_6507x_write(tps, reg, data); if (err) dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg); out: mutex_unlock(&tps->io_lock); return err; } static int tps_6507x_reg_read(struct tps_pmic *tps, u8 reg) { int data; mutex_lock(&tps->io_lock); data = tps_6507x_read(tps, reg); if (data < 0) dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg); mutex_unlock(&tps->io_lock); return data; } static int tps_6507x_reg_write(struct tps_pmic *tps, u8 reg, u8 val) { int err; mutex_lock(&tps->io_lock); err = tps_6507x_write(tps, reg, val); if (err < 0) dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg); mutex_unlock(&tps->io_lock); return err; } static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, dcdc = rdev_get_id(dev); u8 shift; if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) return -EINVAL; shift = TPS6507X_MAX_REG_ID - dcdc; data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1); if (data < 0) return data; else return (data & 1<<shift) ? 1 : 0; } static int tps6507x_ldo_is_enabled(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, ldo = rdev_get_id(dev); u8 shift; if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) return -EINVAL; shift = TPS6507X_MAX_REG_ID - ldo; data = tps_6507x_reg_read(tps, TPS6507X_REG_CON_CTRL1); if (data < 0) return data; else return (data & 1<<shift) ? 1 : 0; } static int tps6507x_dcdc_enable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int dcdc = rdev_get_id(dev); u8 shift; if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) return -EINVAL; shift = TPS6507X_MAX_REG_ID - dcdc; return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); } static int tps6507x_dcdc_disable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int dcdc = rdev_get_id(dev); u8 shift; if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) return -EINVAL; shift = TPS6507X_MAX_REG_ID - dcdc; return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); } static int tps6507x_ldo_enable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev); u8 shift; if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) return -EINVAL; shift = TPS6507X_MAX_REG_ID - ldo; return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); } static int tps6507x_ldo_disable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev); u8 shift; if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) return -EINVAL; shift = TPS6507X_MAX_REG_ID - ldo; return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift); } static int tps6507x_dcdc_get_voltage(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, dcdc = rdev_get_id(dev); u8 reg; switch (dcdc) { case TPS6507X_DCDC_1: reg = TPS6507X_REG_DEFDCDC1; break; case TPS6507X_DCDC_2: reg = TPS6507X_REG_DEFDCDC2_LOW; break; case TPS6507X_DCDC_3: reg = TPS6507X_REG_DEFDCDC3_LOW; break; default: return -EINVAL; } data = tps_6507x_reg_read(tps, reg); if (data < 0) return data; data &= TPS6507X_DEFDCDCX_DCDC_MASK; return tps->info[dcdc]->table[data] * 1000; } static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev, int min_uV, int max_uV) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, vsel, dcdc = rdev_get_id(dev); u8 reg; switch (dcdc) { case TPS6507X_DCDC_1: reg = TPS6507X_REG_DEFDCDC1; break; case TPS6507X_DCDC_2: reg = TPS6507X_REG_DEFDCDC2_LOW; break; case TPS6507X_DCDC_3: reg = TPS6507X_REG_DEFDCDC3_LOW; break; default: return -EINVAL; } if (min_uV < tps->info[dcdc]->min_uV || min_uV > tps->info[dcdc]->max_uV) return -EINVAL; if (max_uV < tps->info[dcdc]->min_uV || max_uV > tps->info[dcdc]->max_uV) return -EINVAL; for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) { int mV = tps->info[dcdc]->table[vsel]; int uV = mV * 1000; /* Break at the first in-range value */ if (min_uV <= uV && uV <= max_uV) break; } /* write to the register in case we found a match */ if (vsel == tps->info[dcdc]->table_len) return -EINVAL; data = tps_6507x_reg_read(tps, reg); if (data < 0) return data; data &= ~TPS6507X_DEFDCDCX_DCDC_MASK; data |= vsel; return tps_6507x_reg_write(tps, reg, data); } static int tps6507x_ldo_get_voltage(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, ldo = rdev_get_id(dev); u8 reg, mask; if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) return -EINVAL; else { reg = (ldo == TPS6507X_LDO_1 ? TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2); mask = (ldo == TPS6507X_LDO_1 ? TPS6507X_REG_LDO_CTRL1_LDO1_MASK : TPS6507X_REG_DEFLDO2_LDO2_MASK); } data = tps_6507x_reg_read(tps, reg); if (data < 0) return data; data &= mask; return tps->info[ldo]->table[data] * 1000; } static int tps6507x_ldo_set_voltage(struct regulator_dev *dev, int min_uV, int max_uV) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, vsel, ldo = rdev_get_id(dev); u8 reg, mask; if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) return -EINVAL; else { reg = (ldo == TPS6507X_LDO_1 ? TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2); mask = (ldo == TPS6507X_LDO_1 ? TPS6507X_REG_LDO_CTRL1_LDO1_MASK : TPS6507X_REG_DEFLDO2_LDO2_MASK); } if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV) return -EINVAL; if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV) return -EINVAL; for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) { int mV = tps->info[ldo]->table[vsel]; int uV = mV * 1000; /* Break at the first in-range value */ if (min_uV <= uV && uV <= max_uV) break; } if (vsel == tps->info[ldo]->table_len) return -EINVAL; data = tps_6507x_reg_read(tps, reg); if (data < 0) return data; data &= ~mask; data |= vsel; return tps_6507x_reg_write(tps, reg, data); } static int tps6507x_dcdc_list_voltage(struct regulator_dev *dev, unsigned selector) { struct tps_pmic *tps = rdev_get_drvdata(dev); int dcdc = rdev_get_id(dev); if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3) return -EINVAL; if (selector >= tps->info[dcdc]->table_len) return -EINVAL; else return tps->info[dcdc]->table[selector] * 1000; } static int tps6507x_ldo_list_voltage(struct regulator_dev *dev, unsigned selector) { struct tps_pmic *tps = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev); if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2) return -EINVAL; if (selector >= tps->info[ldo]->table_len) return -EINVAL; else return tps->info[ldo]->table[selector] * 1000; } /* Operations permitted on VDCDCx */ static struct regulator_ops tps6507x_dcdc_ops = { .is_enabled = tps6507x_dcdc_is_enabled, .enable = tps6507x_dcdc_enable, .disable = tps6507x_dcdc_disable, .get_voltage = tps6507x_dcdc_get_voltage, .set_voltage = tps6507x_dcdc_set_voltage, .list_voltage = tps6507x_dcdc_list_voltage, }; /* Operations permitted on LDOx */ static struct regulator_ops tps6507x_ldo_ops = { .is_enabled = tps6507x_ldo_is_enabled, .enable = tps6507x_ldo_enable, .disable = tps6507x_ldo_disable, .get_voltage = tps6507x_ldo_get_voltage, .set_voltage = tps6507x_ldo_set_voltage, .list_voltage = tps6507x_ldo_list_voltage, }; static int tps_6507x_probe(struct i2c_client *client, const struct i2c_device_id *id) { static int desc_id; const struct tps_info *info = (void *)id->driver_data; struct regulator_init_data *init_data; struct regulator_dev *rdev; struct tps_pmic *tps; int i; if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) return -EIO; /** * init_data points to array of regulator_init structures * coming from the board-evm file. */ init_data = client->dev.platform_data; if (!init_data) return -EIO; tps = kzalloc(sizeof(*tps), GFP_KERNEL); if (!tps) return -ENOMEM; mutex_init(&tps->io_lock); /* common for all regulators */ tps->client = client; for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) { /* Register the regulators */ tps->info[i] = info; tps->desc[i].name = info->name; tps->desc[i].id = desc_id++; tps->desc[i].n_voltages = num_voltages[i]; tps->desc[i].ops = (i > TPS6507X_DCDC_3 ? &tps6507x_ldo_ops : &tps6507x_dcdc_ops); tps->desc[i].type = REGULATOR_VOLTAGE; tps->desc[i].owner = THIS_MODULE; rdev = regulator_register(&tps->desc[i], &client->dev, init_data, tps); if (IS_ERR(rdev)) { dev_err(&client->dev, "failed to register %s\n", id->name); /* Unregister */ while (i) regulator_unregister(tps->rdev[--i]); tps->client = NULL; /* clear the client data in i2c */ i2c_set_clientdata(client, NULL); kfree(tps); return PTR_ERR(rdev); } /* Save regulator for cleanup */ tps->rdev[i] = rdev; } i2c_set_clientdata(client, tps); return 0; } /** * tps_6507x_remove - TPS6507x driver i2c remove handler * @client: i2c driver client device structure * * Unregister TPS driver as an i2c client device driver */ static int __devexit tps_6507x_remove(struct i2c_client *client) { struct tps_pmic *tps = i2c_get_clientdata(client); int i; for (i = 0; i < TPS6507X_NUM_REGULATOR; i++) regulator_unregister(tps->rdev[i]); tps->client = NULL; /* clear the client data in i2c */ i2c_set_clientdata(client, NULL); kfree(tps); return 0; } static const struct tps_info tps6507x_regs[] = { { .name = "VDCDC1", .min_uV = 725000, .max_uV = 3300000, .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), .table = VDCDCx_VSEL_table, }, { .name = "VDCDC2", .min_uV = 725000, .max_uV = 3300000, .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), .table = VDCDCx_VSEL_table, }, { .name = "VDCDC3", .min_uV = 725000, .max_uV = 3300000, .table_len = ARRAY_SIZE(VDCDCx_VSEL_table), .table = VDCDCx_VSEL_table, }, { .name = "LDO1", .min_uV = 1000000, .max_uV = 3300000, .table_len = ARRAY_SIZE(LDO1_VSEL_table), .table = LDO1_VSEL_table, }, { .name = "LDO2", .min_uV = 725000, .max_uV = 3300000, .table_len = ARRAY_SIZE(LDO2_VSEL_table), .table = LDO2_VSEL_table, }, }; static const struct i2c_device_id tps_6507x_id[] = { {.name = "tps6507x", .driver_data = (unsigned long) tps6507x_regs,}, { }, }; MODULE_DEVICE_TABLE(i2c, tps_6507x_id); static struct i2c_driver tps_6507x_i2c_driver = { .driver = { .name = "tps6507x", .owner = THIS_MODULE, }, .probe = tps_6507x_probe, .remove = __devexit_p(tps_6507x_remove), .id_table = tps_6507x_id, }; /** * tps_6507x_init * * Module init function */ static int __init tps_6507x_init(void) { return i2c_add_driver(&tps_6507x_i2c_driver); } subsys_initcall(tps_6507x_init); /** * tps_6507x_cleanup * * Module exit function */ static void __exit tps_6507x_cleanup(void) { i2c_del_driver(&tps_6507x_i2c_driver); } module_exit(tps_6507x_cleanup); MODULE_AUTHOR("Texas Instruments"); MODULE_DESCRIPTION("TPS6507x voltage regulator driver"); MODULE_LICENSE("GPL v2");