Added regulator driver for TPS65023 and modified the Kconfig and Makefile for the same.
Signed-off-by: Anuj Aggarwal <[email protected]> --- drivers/regulator/Kconfig | 8 + drivers/regulator/Makefile | 1 + drivers/regulator/tps65023-regulator.c | 510 ++++++++++++++++++++++++++++++++ 3 files changed, 519 insertions(+), 0 deletions(-) create mode 100644 drivers/regulator/tps65023-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index e58c0ce..28109e1 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -91,4 +91,12 @@ config REGULATOR_PCF50633 Say Y here to support the voltage regulators and convertors on PCF50633 +config REGULATOR_TPS65023 + tristate "TI TPS65023 Power regulators" + depends on OMAP3EVM_TPS65023 + help + This driver supports TPS65023 voltage regulator chips. TPS65023 provides + three step-down converters and two general-purpose LDO voltage regulators. + It supports TI's software based Class-2 SmartReflex implementation. + endif diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index c0d87bf..28235b9 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -13,5 +13,6 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o obj-$(CONFIG_REGULATOR_DA903X) += da903x.o obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o +obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG diff --git a/drivers/regulator/tps65023-regulator.c b/drivers/regulator/tps65023-regulator.c new file mode 100644 index 0000000..657c0c3 --- /dev/null +++ b/drivers/regulator/tps65023-regulator.c @@ -0,0 +1,510 @@ +/* + * tps65023-regulator.c -- Supports TPS65023 regulator + * + * Author : Anuj Aggarwal<[email protected]> + * + * 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. + */ + +#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 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) + +struct tps_info { + const char *name; + unsigned min_uV; + unsigned max_uV; + bool fixed; + u8 table_len; + const u16 *table; +}; + +struct tps { + 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]; +}; + +static inline int tps_65023_read_reg(struct tps *tps, u8 reg, u8 *val) +{ + int status; + + status = i2c_smbus_read_byte_data(tps->client, reg); + *val = status; + if (status < 0) + return status; + return 0; +} + +static inline int tps_65023_write_reg(struct tps *tps, u8 reg, u8 val) +{ + return i2c_smbus_write_byte_data(tps->client, reg, val); +} + +static int tps65023_dcdc_is_enabled(struct regulator_dev *dev) +{ + unsigned char reg_ctrl; + struct tps *tps = rdev_get_drvdata(dev); + int regulator_id = rdev_get_id(dev); + int ret; + + ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl); + + if (ret == 0) { + switch (regulator_id) { + case 0: + reg_ctrl &= TPS65023_REG_CTRL_VDCDC1_EN; + break; + + case 1: + reg_ctrl &= TPS65023_REG_CTRL_VDCDC2_EN; + break; + + case 2: + reg_ctrl &= TPS65023_REG_CTRL_VDCDC3_EN; + break; + + case 3: + reg_ctrl &= TPS65023_REG_CTRL_LDO1_EN; + break; + + case 4: + reg_ctrl &= TPS65023_REG_CTRL_LDO2_EN; + break; + + default: + /* error message */ + break; + } + } + + if (ret == 0) + return reg_ctrl ? 1 : 0; + else + return ret; +} + +static int tps65023_dcdc_enable(struct regulator_dev *dev) +{ + unsigned char reg_ctrl; + struct tps *tps = rdev_get_drvdata(dev); + int regulator_id = rdev_get_id(dev); + int ret; + + ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl); + + if (ret == 0) { + switch (regulator_id) { + case 0: + reg_ctrl |= TPS65023_REG_CTRL_VDCDC1_EN; + break; + + case 1: + reg_ctrl |= TPS65023_REG_CTRL_VDCDC2_EN; + break; + + case 2: + reg_ctrl |= TPS65023_REG_CTRL_VDCDC3_EN; + break; + + case 3: + reg_ctrl |= TPS65023_REG_CTRL_LDO1_EN; + break; + + case 4: + reg_ctrl |= TPS65023_REG_CTRL_LDO2_EN; + break; + + default: + /* error message */ + break; + } + } + + if (ret == 0) + return tps_65023_write_reg(tps, TPS65023_REG_REG_CTRL, + reg_ctrl); + else + return ret; +} + +static int tps65023_dcdc_disable(struct regulator_dev *dev) +{ + unsigned char reg_ctrl; + struct tps *tps = rdev_get_drvdata(dev); + int regulator_id = rdev_get_id(dev); + int ret; + + ret = tps_65023_read_reg(tps, TPS65023_REG_REG_CTRL, ®_ctrl); + + if (ret == 0) { + switch (regulator_id) { + case 0: + reg_ctrl &= ~(TPS65023_REG_CTRL_VDCDC1_EN); + break; + + case 1: + reg_ctrl &= ~(TPS65023_REG_CTRL_VDCDC2_EN); + break; + + case 2: + reg_ctrl &= ~(TPS65023_REG_CTRL_VDCDC3_EN); + break; + + case 3: + reg_ctrl &= ~(TPS65023_REG_CTRL_LDO1_EN); + break; + + case 4: + reg_ctrl &= ~(TPS65023_REG_CTRL_LDO2_EN); + break; + + default: + /* error message */ + break; + } + } + + if (ret == 0) + return tps_65023_write_reg(tps, TPS65023_REG_REG_CTRL, + reg_ctrl); + else + return ret; +} + +static int tps65023_fixed_get_voltage(struct regulator_dev *dev) +{ + struct tps *tps = rdev_get_drvdata(dev); + int regulator_id = rdev_get_id(dev); + + return tps->info[regulator_id]->min_uV; +} + +static int tps65023_dcdc_get_voltage(struct regulator_dev *dev) +{ + unsigned char reg_ctrl; + struct tps *tps = rdev_get_drvdata(dev); + int regulator_id = rdev_get_id(dev); + u8 reg; + int ret; + + /* Choose the control register according to the regulator */ + reg = (regulator_id ? TPS65023_REG_LDO_CTRL : TPS65023_REG_DEF_CORE); + ret = tps_65023_read_reg(tps, reg, ®_ctrl); + if (ret < 0) + return ret; + + if (regulator_id) { + /* Select between LDO 1 and 2 */ + int ldo_id = regulator_id - TPS65023_NUM_DCDC; + + reg_ctrl >>= (TPS65023_LDO_CTRL_LDOx_SHIFT * ldo_id); + reg_ctrl &= (tps->info[regulator_id]->table_len - 1); + return tps->info[regulator_id]->table[reg_ctrl] * 1000; + } else { + /* VDCDC1 */ + reg_ctrl &= (tps->info[regulator_id]->table_len - 1); + return tps->info[regulator_id]->table[reg_ctrl] * 1000; + } +} + +static int tps65023_dcdc_set_voltage(struct regulator_dev *dev, + int min_uV, int max_uV) +{ + struct tps *tps = rdev_get_drvdata(dev); + int regulator_id = rdev_get_id(dev); + u8 reg; + int vsel; + + /* Choose the control register according to the regulator */ + reg = (regulator_id ? TPS65023_REG_LDO_CTRL : TPS65023_REG_DEF_CORE); + + for (vsel = 0; vsel < tps->info[regulator_id]->table_len; vsel++) { + int mV = tps->info[regulator_id]->table[vsel]; + int uV = mV * 1000; + + /* Break at the first in-range value */ + if (min_uV <= uV && uV <= max_uV) + break; + } + + if (regulator_id) { + /* LDO 1 or 2 */ + int ret; + unsigned char reg_ctrl; + int ldo_id = regulator_id - TPS65023_NUM_DCDC; + + ret = tps_65023_read_reg(tps, reg, ®_ctrl); + if (ret < 0) + return ret; + + reg_ctrl &= TPS65023_LDO_CTRL_LDOx_MASK(ldo_id); + reg_ctrl |= (vsel << (ldo_id * TPS65023_LDO_CTRL_LDOx_SHIFT)); + return tps_65023_write_reg(tps, reg, reg_ctrl); + } else { + /* VDCDC1 */ + return tps_65023_write_reg(tps, reg, vsel); + } +} + +/* Voltage set is not permitted on VDCDC2/3 */ +static struct regulator_ops tps65023_fixed_ops = { + .is_enabled = tps65023_dcdc_is_enabled, + .enable = tps65023_dcdc_enable, + .disable = tps65023_dcdc_disable, + .get_voltage = tps65023_fixed_get_voltage, +}; + +/* Operations permitted on VDCDC1 and LDO1/2 */ +static struct regulator_ops tps65023_adjustable_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, +}; + +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 *tps; + int i; + int num_regulators = 0; + unsigned char reg_val; + + 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].ops = (info->fixed ? &tps65023_fixed_ops + : &tps65023_adjustable_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); + 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 *tps = i2c_get_clientdata(client); + + regulator_unregister(tps->rdev); + /* clear the client data in i2c */ + i2c_set_clientdata(client, NULL); + kfree(tps); + + return 0; +} + +/* 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, + }; + +/* + * These regulators have the same register structure, and differ + * primarily according to supported voltages and default settings. + */ +static const struct tps_info tps65023_regs[] = { + { + .name = "VDCDC1", + .min_uV = 800000, + .max_uV = 1600000, + .fixed = 0, + .table_len = ARRAY_SIZE(VDCDC1_VSEL_table), + .table = VDCDC1_VSEL_table, + }, + { + .name = "VDCDC2", + .min_uV = 3300000, + .max_uV = 3300000, + .fixed = 1, + .table_len = 0, + }, + { + .name = "VDCDC3", + .min_uV = 1800000, + .max_uV = 1800000, + .fixed = 1, + .table_len = 0, + }, + { + .name = "LDO1", + .min_uV = 1000000, + .max_uV = 3150000, + .fixed = 0, + .table_len = ARRAY_SIZE(LDO1_VSEL_table), + .table = LDO1_VSEL_table, + }, + { + .name = "LDO2", + .min_uV = 1000000, + .max_uV = 3150000, + .fixed = 0, + .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 = "tps_65023_pwr", + .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); +} +late_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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
