434 lines
11 KiB
C
434 lines
11 KiB
C
/*
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* tps65023-regulator.c
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*
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* Supports TPS65023 Regulator
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*
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* Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
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* whether express or implied; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/regmap.h>
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/* Register definitions */
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#define TPS65023_REG_VERSION 0
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#define TPS65023_REG_PGOODZ 1
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#define TPS65023_REG_MASK 2
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#define TPS65023_REG_REG_CTRL 3
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#define TPS65023_REG_CON_CTRL 4
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#define TPS65023_REG_CON_CTRL2 5
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#define TPS65023_REG_DEF_CORE 6
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#define TPS65023_REG_DEFSLEW 7
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#define TPS65023_REG_LDO_CTRL 8
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/* PGOODZ bitfields */
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#define TPS65023_PGOODZ_PWRFAILZ BIT(7)
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#define TPS65023_PGOODZ_LOWBATTZ BIT(6)
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#define TPS65023_PGOODZ_VDCDC1 BIT(5)
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#define TPS65023_PGOODZ_VDCDC2 BIT(4)
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#define TPS65023_PGOODZ_VDCDC3 BIT(3)
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#define TPS65023_PGOODZ_LDO2 BIT(2)
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#define TPS65023_PGOODZ_LDO1 BIT(1)
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/* MASK bitfields */
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#define TPS65023_MASK_PWRFAILZ BIT(7)
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#define TPS65023_MASK_LOWBATTZ BIT(6)
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#define TPS65023_MASK_VDCDC1 BIT(5)
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#define TPS65023_MASK_VDCDC2 BIT(4)
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#define TPS65023_MASK_VDCDC3 BIT(3)
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#define TPS65023_MASK_LDO2 BIT(2)
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#define TPS65023_MASK_LDO1 BIT(1)
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/* REG_CTRL bitfields */
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#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
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#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
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#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
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#define TPS65023_REG_CTRL_LDO2_EN BIT(2)
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#define TPS65023_REG_CTRL_LDO1_EN BIT(1)
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/* REG_CTRL2 bitfields */
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#define TPS65023_REG_CTRL2_GO BIT(7)
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#define TPS65023_REG_CTRL2_CORE_ADJ BIT(6)
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#define TPS65023_REG_CTRL2_DCDC2 BIT(2)
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#define TPS65023_REG_CTRL2_DCDC1 BIT(1)
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#define TPS65023_REG_CTRL2_DCDC3 BIT(0)
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/* Number of step-down converters available */
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#define TPS65023_NUM_DCDC 3
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/* Number of LDO voltage regulators available */
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#define TPS65023_NUM_LDO 2
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/* Number of total regulators available */
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#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
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/* DCDCs */
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#define TPS65023_DCDC_1 0
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#define TPS65023_DCDC_2 1
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#define TPS65023_DCDC_3 2
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/* LDOs */
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#define TPS65023_LDO_1 3
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#define TPS65023_LDO_2 4
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#define TPS65023_MAX_REG_ID TPS65023_LDO_2
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/* Supported voltage values for regulators */
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static const unsigned int VCORE_VSEL_table[] = {
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800000, 825000, 850000, 875000,
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900000, 925000, 950000, 975000,
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1000000, 1025000, 1050000, 1075000,
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1100000, 1125000, 1150000, 1175000,
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1200000, 1225000, 1250000, 1275000,
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1300000, 1325000, 1350000, 1375000,
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1400000, 1425000, 1450000, 1475000,
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1500000, 1525000, 1550000, 1600000,
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};
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static const unsigned int DCDC_FIXED_3300000_VSEL_table[] = {
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3300000,
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};
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static const unsigned int DCDC_FIXED_1800000_VSEL_table[] = {
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1800000,
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};
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/* Supported voltage values for LDO regulators for tps65020 */
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static const unsigned int TPS65020_LDO_VSEL_table[] = {
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1000000, 1050000, 1100000, 1300000,
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1800000, 2500000, 3000000, 3300000,
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};
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/* Supported voltage values for LDO regulators
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* for tps65021 and tps65023 */
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static const unsigned int TPS65023_LDO1_VSEL_table[] = {
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1000000, 1100000, 1300000, 1800000,
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2200000, 2600000, 2800000, 3150000,
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};
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static const unsigned int TPS65023_LDO2_VSEL_table[] = {
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1050000, 1200000, 1300000, 1800000,
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2500000, 2800000, 3000000, 3300000,
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};
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/* Regulator specific details */
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struct tps_info {
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const char *name;
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u8 table_len;
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const unsigned int *table;
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};
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/* PMIC details */
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struct tps_pmic {
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struct regulator_desc desc[TPS65023_NUM_REGULATOR];
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struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
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const struct tps_info *info[TPS65023_NUM_REGULATOR];
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struct regmap *regmap;
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u8 core_regulator;
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};
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/* Struct passed as driver data */
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struct tps_driver_data {
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const struct tps_info *info;
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u8 core_regulator;
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};
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static int tps65023_dcdc_get_voltage_sel(struct regulator_dev *dev)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int dcdc = rdev_get_id(dev);
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if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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if (dcdc != tps->core_regulator)
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return 0;
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return regulator_get_voltage_sel_regmap(dev);
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}
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static int tps65023_dcdc_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int dcdc = rdev_get_id(dev);
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if (dcdc != tps->core_regulator)
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return -EINVAL;
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return regulator_set_voltage_sel_regmap(dev, selector);
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}
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/* Operations permitted on VDCDCx */
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static const struct regulator_ops tps65023_dcdc_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = tps65023_dcdc_get_voltage_sel,
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.set_voltage_sel = tps65023_dcdc_set_voltage_sel,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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};
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/* Operations permitted on LDOx */
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static const struct regulator_ops tps65023_ldo_ops = {
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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};
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static const struct regmap_config tps65023_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int tps_65023_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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const struct tps_driver_data *drv_data = (void *)id->driver_data;
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const struct tps_info *info = drv_data->info;
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struct regulator_config config = { };
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struct regulator_init_data *init_data;
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struct regulator_dev *rdev;
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struct tps_pmic *tps;
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int i;
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int error;
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/**
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* init_data points to array of regulator_init structures
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* coming from the board-evm file.
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*/
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init_data = dev_get_platdata(&client->dev);
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if (!init_data)
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return -EIO;
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tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
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if (!tps)
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return -ENOMEM;
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tps->regmap = devm_regmap_init_i2c(client, &tps65023_regmap_config);
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if (IS_ERR(tps->regmap)) {
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error = PTR_ERR(tps->regmap);
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dev_err(&client->dev, "Failed to allocate register map: %d\n",
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error);
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return error;
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}
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/* common for all regulators */
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tps->core_regulator = drv_data->core_regulator;
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for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
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/* Store regulator specific information */
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tps->info[i] = info;
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tps->desc[i].name = info->name;
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tps->desc[i].id = i;
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tps->desc[i].n_voltages = info->table_len;
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tps->desc[i].volt_table = info->table;
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tps->desc[i].ops = (i > TPS65023_DCDC_3 ?
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&tps65023_ldo_ops : &tps65023_dcdc_ops);
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tps->desc[i].type = REGULATOR_VOLTAGE;
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tps->desc[i].owner = THIS_MODULE;
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tps->desc[i].enable_reg = TPS65023_REG_REG_CTRL;
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switch (i) {
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case TPS65023_LDO_1:
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tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
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tps->desc[i].vsel_mask = 0x07;
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tps->desc[i].enable_mask = 1 << 1;
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break;
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case TPS65023_LDO_2:
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tps->desc[i].vsel_reg = TPS65023_REG_LDO_CTRL;
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tps->desc[i].vsel_mask = 0x70;
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tps->desc[i].enable_mask = 1 << 2;
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break;
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default: /* DCDCx */
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tps->desc[i].enable_mask =
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1 << (TPS65023_NUM_REGULATOR - i);
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tps->desc[i].vsel_reg = TPS65023_REG_DEF_CORE;
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tps->desc[i].vsel_mask = info->table_len - 1;
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tps->desc[i].apply_reg = TPS65023_REG_CON_CTRL2;
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tps->desc[i].apply_bit = TPS65023_REG_CTRL2_GO;
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}
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config.dev = &client->dev;
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config.init_data = init_data;
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config.driver_data = tps;
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config.regmap = tps->regmap;
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/* Register the regulators */
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rdev = devm_regulator_register(&client->dev, &tps->desc[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(&client->dev, "failed to register %s\n",
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id->name);
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return PTR_ERR(rdev);
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}
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/* Save regulator for cleanup */
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tps->rdev[i] = rdev;
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}
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i2c_set_clientdata(client, tps);
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/* Enable setting output voltage by I2C */
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regmap_update_bits(tps->regmap, TPS65023_REG_CON_CTRL2,
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TPS65023_REG_CTRL2_CORE_ADJ,
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TPS65023_REG_CTRL2_CORE_ADJ);
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return 0;
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}
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static const struct tps_info tps65020_regs[] = {
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{
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.name = "VDCDC1",
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.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
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.table = DCDC_FIXED_3300000_VSEL_table,
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},
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{
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.name = "VDCDC2",
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.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
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.table = DCDC_FIXED_1800000_VSEL_table,
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},
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{
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.name = "VDCDC3",
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.table_len = ARRAY_SIZE(VCORE_VSEL_table),
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.table = VCORE_VSEL_table,
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},
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{
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.name = "LDO1",
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.table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
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.table = TPS65020_LDO_VSEL_table,
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},
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{
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.name = "LDO2",
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.table_len = ARRAY_SIZE(TPS65020_LDO_VSEL_table),
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.table = TPS65020_LDO_VSEL_table,
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},
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};
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static const struct tps_info tps65021_regs[] = {
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{
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.name = "VDCDC1",
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.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
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.table = DCDC_FIXED_3300000_VSEL_table,
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},
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{
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.name = "VDCDC2",
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.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
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.table = DCDC_FIXED_1800000_VSEL_table,
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},
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{
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.name = "VDCDC3",
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.table_len = ARRAY_SIZE(VCORE_VSEL_table),
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.table = VCORE_VSEL_table,
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},
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{
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.name = "LDO1",
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.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
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.table = TPS65023_LDO1_VSEL_table,
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},
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{
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.name = "LDO2",
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.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
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.table = TPS65023_LDO2_VSEL_table,
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},
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};
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static const struct tps_info tps65023_regs[] = {
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{
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.name = "VDCDC1",
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.table_len = ARRAY_SIZE(VCORE_VSEL_table),
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.table = VCORE_VSEL_table,
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},
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{
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.name = "VDCDC2",
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.table_len = ARRAY_SIZE(DCDC_FIXED_3300000_VSEL_table),
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.table = DCDC_FIXED_3300000_VSEL_table,
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},
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{
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.name = "VDCDC3",
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.table_len = ARRAY_SIZE(DCDC_FIXED_1800000_VSEL_table),
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.table = DCDC_FIXED_1800000_VSEL_table,
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},
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{
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.name = "LDO1",
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.table_len = ARRAY_SIZE(TPS65023_LDO1_VSEL_table),
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.table = TPS65023_LDO1_VSEL_table,
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},
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{
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.name = "LDO2",
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.table_len = ARRAY_SIZE(TPS65023_LDO2_VSEL_table),
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.table = TPS65023_LDO2_VSEL_table,
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},
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};
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static struct tps_driver_data tps65020_drv_data = {
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.info = tps65020_regs,
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.core_regulator = TPS65023_DCDC_3,
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};
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static struct tps_driver_data tps65021_drv_data = {
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.info = tps65021_regs,
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.core_regulator = TPS65023_DCDC_3,
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};
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static struct tps_driver_data tps65023_drv_data = {
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.info = tps65023_regs,
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.core_regulator = TPS65023_DCDC_1,
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};
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static const struct i2c_device_id tps_65023_id[] = {
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{.name = "tps65023",
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.driver_data = (unsigned long) &tps65023_drv_data},
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{.name = "tps65021",
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.driver_data = (unsigned long) &tps65021_drv_data,},
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{.name = "tps65020",
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.driver_data = (unsigned long) &tps65020_drv_data},
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, tps_65023_id);
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static struct i2c_driver tps_65023_i2c_driver = {
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.driver = {
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.name = "tps65023",
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.owner = THIS_MODULE,
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},
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.probe = tps_65023_probe,
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.id_table = tps_65023_id,
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};
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static int __init tps_65023_init(void)
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{
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return i2c_add_driver(&tps_65023_i2c_driver);
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}
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subsys_initcall(tps_65023_init);
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static void __exit tps_65023_cleanup(void)
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{
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i2c_del_driver(&tps_65023_i2c_driver);
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}
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module_exit(tps_65023_cleanup);
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MODULE_AUTHOR("Texas Instruments");
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MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
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MODULE_LICENSE("GPL v2");
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