2009/8/12 Anuj Aggarwal <anuj.aggarwal@xxxxxx>: > Adding support for TI TPS65023 regulator driver > > Signed-off-by: Anuj Aggarwal <anuj.aggarwal@xxxxxx> > --- > drivers/regulator/tps65023-regulator.c | 638 ++++++++++++++++++++++++++++++++ > 1 files changed, 638 insertions(+), 0 deletions(-) > create mode 100644 drivers/regulator/tps65023-regulator.c > > diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c > new file mode 100644 > index 0000000..dbaf295 > --- /dev/null > +++ b/drivers/regulator/tps65023-regulator.c > @@ -0,0 +1,638 @@ > +/* > + * 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 <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 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) > + > +/* 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; > +}; > + > +static inline int tps_65023_read(struct tps_pmic *tps, u8 reg) > +{ > + return i2c_smbus_read_byte_data(tps->client, 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; > + u8 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; > + u8 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) > +{ > + u8 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) > +{ > + u8 data; > + 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; > + data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL); > + > + if (data >= 0) { > + data &= (1 << shift); > + return data ? 1 : 0; > + } else > + return data; > +} > + > +static int tps65023_ldo_is_enabled(struct regulator_dev *dev) > +{ > + struct tps_pmic *tps = rdev_get_drvdata(dev); > + int ldo = rdev_get_id(dev); > + u8 shift; > + u8 data; > + > + if (ldo < TPS65023_LDO_1 || ldo > 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) { > + data &= (1 << shift); > + return data ? 1 : 0; > + } else > + return data; > +} > + > +static int tps65023_dcdc_enable(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_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) > +{ > + u8 data; > + 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) { > + 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; > + > + 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]; > + 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; > + else > + return tps_65023_reg_write(tps, TPS65023_REG_DEF_CORE, vsel); > +} > + > +static int tps65023_ldo_get_voltage(struct regulator_dev *dev) > +{ > + u8 data; > + 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; > + > + 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 ldo = rdev_get_id(dev); > + int vsel; > + u8 data; > + > + 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; > + > + 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); You haven't yet set the clientdata at this point, so it is already NULL. So this is unnecessary. > + 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[0], > +}; > + > +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("GPLv2"); > -- > 1.6.2.4 Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
