/* * tps65023-regulator.c * * Supports TPS65023 Regulator * * 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 #include #include #include #include #include #include #include #include /* Register definitions */ #define TPS65023_REG_VERSION 0 #define TPS65023_REG_PGOODZ 1 #define TPS65023_REG_MASK 2 #define TPS65023_REG_REG_CTRL 3 #define TPS65023_REG_CON_CTRL 4 #define TPS65023_REG_CON_CTRL2 5 #define TPS65023_REG_DEF_CORE 6 #define TPS65023_REG_DEFSLEW 7 #define TPS65023_REG_LDO_CTRL 8 /* PGOODZ bitfields */ #define TPS65023_PGOODZ_PWRFAILZ BIT(7) #define TPS65023_PGOODZ_LOWBATTZ BIT(6) #define TPS65023_PGOODZ_VDCDC1 BIT(5) #define TPS65023_PGOODZ_VDCDC2 BIT(4) #define TPS65023_PGOODZ_VDCDC3 BIT(3) #define TPS65023_PGOODZ_LDO2 BIT(2) #define TPS65023_PGOODZ_LDO1 BIT(1) /* MASK bitfields */ #define TPS65023_MASK_PWRFAILZ BIT(7) #define TPS65023_MASK_LOWBATTZ BIT(6) #define TPS65023_MASK_VDCDC1 BIT(5) #define TPS65023_MASK_VDCDC2 BIT(4) #define TPS65023_MASK_VDCDC3 BIT(3) #define TPS65023_MASK_LDO2 BIT(2) #define TPS65023_MASK_LDO1 BIT(1) /* REG_CTRL bitfields */ #define TPS65023_REG_CTRL_VDCDC1_EN BIT(5) #define TPS65023_REG_CTRL_VDCDC2_EN BIT(4) #define TPS65023_REG_CTRL_VDCDC3_EN BIT(3) #define TPS65023_REG_CTRL_LDO2_EN BIT(2) #define TPS65023_REG_CTRL_LDO1_EN BIT(1) /* CON_CTRL2 bitfields */ #define TPS65023_CON_CTRL2_GO BIT(7) /* LDO_CTRL bitfields */ #define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id) ((ldo_id)*4) #define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id) (0xF0 >> ((ldo_id)*4)) /* Number of step-down converters available */ #define TPS65023_NUM_DCDC 3 /* Number of LDO voltage regulators available */ #define TPS65023_NUM_LDO 2 /* Number of total regulators available */ #define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO) /* DCDCs */ #define TPS65023_DCDC_1 0 #define TPS65023_DCDC_2 1 #define TPS65023_DCDC_3 2 /* LDOs */ #define TPS65023_LDO_1 3 #define TPS65023_LDO_2 4 #define TPS65023_MAX_REG_ID TPS65023_LDO_2 /* Supported voltage values for regulators */ static const u16 VDCDC1_VSEL_table[] = { 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, 1525, 1550, 1600, }; static const u16 LDO1_VSEL_table[] = { 1000, 1100, 1300, 1800, 2200, 2600, 2800, 3150, }; static const u16 LDO2_VSEL_table[] = { 1050, 1200, 1300, 1800, 2500, 2800, 3000, 3300, }; static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDC1_VSEL_table), 0, 0, ARRAY_SIZE(LDO1_VSEL_table), ARRAY_SIZE(LDO2_VSEL_table)}; /* Regulator specific details */ struct tps_info { const char *name; unsigned min_uV; unsigned max_uV; bool fixed; u8 table_len; const u16 *table; }; /* PMIC details */ struct tps_pmic { struct regulator_desc desc[TPS65023_NUM_REGULATOR]; struct i2c_client *client; struct regulator_dev *rdev[TPS65023_NUM_REGULATOR]; const struct tps_info *info[TPS65023_NUM_REGULATOR]; struct mutex io_lock; unsigned dcdc1_last_uV; }; static int tps_65023_read_3bytes(struct tps_pmic *tps, u8 reg) { int rv; u8 txbuf[1]; u8 rxbuf[3]; struct i2c_msg msgs[] = { { .addr = tps->client->addr, .flags = 0, .len = sizeof(txbuf), .buf = txbuf, }, { .addr = tps->client->addr, .flags = I2C_M_RD, .len = sizeof(rxbuf), .buf = rxbuf, }, }; txbuf[0] = reg; rv = i2c_transfer(tps->client->adapter, msgs, 2); if (rv < 0) return rv; return rxbuf[0]; } static inline int tps_65023_read(struct tps_pmic *tps, u8 reg) { return tps_65023_read_3bytes(tps, reg); } static inline int tps_65023_write(struct tps_pmic *tps, u8 reg, u8 val) { return i2c_smbus_write_byte_data(tps->client, reg, val); } static int tps_65023_set_bits(struct tps_pmic *tps, u8 reg, u8 mask) { int err, data; mutex_lock(&tps->io_lock); data = tps_65023_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_65023_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_65023_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask) { int err, data; mutex_lock(&tps->io_lock); data = tps_65023_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_65023_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_65023_reg_read(struct tps_pmic *tps, u8 reg) { int data; mutex_lock(&tps->io_lock); data = tps_65023_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_65023_reg_write(struct tps_pmic *tps, u8 reg, u8 val) { int err; mutex_lock(&tps->io_lock); err = tps_65023_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 tps65023_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 < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) return -EINVAL; shift = TPS65023_NUM_REGULATOR - dcdc; data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL); if (data < 0) return data; else return (data & 1< TPS65023_LDO_2) return -EINVAL; shift = (ldo == TPS65023_LDO_1 ? 1 : 2); data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL); if (data < 0) return data; else return (data & 1< TPS65023_DCDC_3) return -EINVAL; shift = TPS65023_NUM_REGULATOR - dcdc; return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); } static int tps65023_dcdc_disable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int dcdc = rdev_get_id(dev); u8 shift; if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) return -EINVAL; shift = TPS65023_NUM_REGULATOR - dcdc; return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); } static int tps65023_ldo_enable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev); u8 shift; if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) return -EINVAL; shift = (ldo == TPS65023_LDO_1 ? 1 : 2); return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); } static int tps65023_ldo_disable(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int ldo = rdev_get_id(dev); u8 shift; if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) return -EINVAL; shift = (ldo == TPS65023_LDO_1 ? 1 : 2); return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift); } static int tps65023_dcdc_get_voltage(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, dcdc = rdev_get_id(dev); if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) return -EINVAL; if (dcdc == TPS65023_DCDC_1) { data = tps_65023_reg_read(tps, TPS65023_REG_DEF_CORE); if (data < 0) return data; data &= (tps->info[dcdc]->table_len - 1); return tps->info[dcdc]->table[data] * 1000; } else return tps->info[dcdc]->min_uV; } static int tps65023_dcdc_set_voltage(struct regulator_dev *dev, int min_uV, int max_uV) { struct tps_pmic *tps = rdev_get_drvdata(dev); int dcdc = rdev_get_id(dev); int vsel; int rv; int uV = 0; int delay; if (dcdc != TPS65023_DCDC_1) 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]; 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; rv = tps_65023_reg_write(tps, TPS65023_REG_DEF_CORE, vsel); if (!rv) rv = tps_65023_reg_write(tps, TPS65023_REG_CON_CTRL2, TPS65023_CON_CTRL2_GO); /* Add delay to reach relected voltage (14.4 mV/us default slew rate) */ if (tps->dcdc1_last_uV) delay = abs(tps->dcdc1_last_uV - uV); else delay = max(uV - 800000, 1600000 - uV); delay = DIV_ROUND_UP(delay, 14400); udelay(delay); tps->dcdc1_last_uV = rv ? 0 /* Unknown voltage */ : uV; return rv; } static int tps65023_ldo_get_voltage(struct regulator_dev *dev) { struct tps_pmic *tps = rdev_get_drvdata(dev); int data, ldo = rdev_get_id(dev); if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) return -EINVAL; data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL); if (data < 0) return data; data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)); data &= (tps->info[ldo]->table_len - 1); return tps->info[ldo]->table[data] * 1000; } static int tps65023_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); if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2) return -EINVAL; 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_65023_reg_read(tps, TPS65023_REG_LDO_CTRL); if (data < 0) return data; data &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1); data |= (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1))); return tps_65023_reg_write(tps, TPS65023_REG_LDO_CTRL, data); } static int tps65023_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 < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3) return -EINVAL; if (dcdc == TPS65023_DCDC_1) { if (selector >= tps->info[dcdc]->table_len) return -EINVAL; else return tps->info[dcdc]->table[selector] * 1000; } else return tps->info[dcdc]->min_uV; } static int tps65023_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 < TPS65023_LDO_1 || ldo > TPS65023_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 tps65023_dcdc_ops = { .is_enabled = tps65023_dcdc_is_enabled, .enable = tps65023_dcdc_enable, .disable = tps65023_dcdc_disable, .get_voltage = tps65023_dcdc_get_voltage, .set_voltage = tps65023_dcdc_set_voltage, .list_voltage = tps65023_dcdc_list_voltage, }; /* Operations permitted on LDOx */ static struct regulator_ops tps65023_ldo_ops = { .is_enabled = tps65023_ldo_is_enabled, .enable = tps65023_ldo_enable, .disable = tps65023_ldo_disable, .get_voltage = tps65023_ldo_get_voltage, .set_voltage = tps65023_ldo_set_voltage, .list_voltage = tps65023_ldo_list_voltage, }; static int tps_65023_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 < TPS65023_NUM_REGULATOR; i++, info++, init_data++) { /* Store regulator specific information */ 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 > TPS65023_DCDC_3 ? &tps65023_ldo_ops : &tps65023_dcdc_ops); tps->desc[i].type = REGULATOR_VOLTAGE; tps->desc[i].owner = THIS_MODULE; /* Register the regulators */ 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_65023_remove - TPS65023 driver i2c remove handler * @client: i2c driver client device structure * * Unregister TPS driver as an i2c client device driver */ static int __devexit tps_65023_remove(struct i2c_client *client) { struct tps_pmic *tps = i2c_get_clientdata(client); int i; for (i = 0; i < TPS65023_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 tps65023_regs[] = { { .name = "VDCDC1", .min_uV = 800000, .max_uV = 1600000, .table_len = ARRAY_SIZE(VDCDC1_VSEL_table), .table = VDCDC1_VSEL_table, }, { .name = "VDCDC2", .min_uV = 3300000, .max_uV = 3300000, .fixed = 1, }, { .name = "VDCDC3", .min_uV = 1800000, .max_uV = 1800000, .fixed = 1, }, { .name = "LDO1", .min_uV = 1000000, .max_uV = 3150000, .table_len = ARRAY_SIZE(LDO1_VSEL_table), .table = LDO1_VSEL_table, }, { .name = "LDO2", .min_uV = 1050000, .max_uV = 3300000, .table_len = ARRAY_SIZE(LDO2_VSEL_table), .table = LDO2_VSEL_table, }, }; static const struct i2c_device_id tps_65023_id[] = { {.name = "tps65023", .driver_data = (unsigned long) tps65023_regs,}, { }, }; MODULE_DEVICE_TABLE(i2c, tps_65023_id); static struct i2c_driver tps_65023_i2c_driver = { .driver = { .name = "tps65023", .owner = THIS_MODULE, }, .probe = tps_65023_probe, .remove = __devexit_p(tps_65023_remove), .id_table = tps_65023_id, }; /** * tps_65023_init * * Module init function */ static int __init tps_65023_init(void) { return i2c_add_driver(&tps_65023_i2c_driver); } subsys_initcall(tps_65023_init); /** * tps_65023_cleanup * * Module exit function */ static void __exit tps_65023_cleanup(void) { i2c_del_driver(&tps_65023_i2c_driver); } module_exit(tps_65023_cleanup); MODULE_AUTHOR("Texas Instruments"); MODULE_DESCRIPTION("TPS65023 voltage regulator driver"); MODULE_LICENSE("GPL v2");