366 lines
10 KiB
C
366 lines
10 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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#define TPS65023_REGULATOR_DCDC(_num, _t, _em) \
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{ \
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.name = "VDCDC"#_num, \
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.of_match = of_match_ptr("VDCDC"#_num), \
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.regulators_node = of_match_ptr("regulators"), \
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.id = TPS65023_DCDC_##_num, \
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.n_voltages = ARRAY_SIZE(_t), \
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.ops = &tps65023_dcdc_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.volt_table = _t, \
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.vsel_reg = TPS65023_REG_DEF_CORE, \
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.vsel_mask = ARRAY_SIZE(_t) - 1, \
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.enable_mask = _em, \
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.enable_reg = TPS65023_REG_REG_CTRL, \
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.apply_reg = TPS65023_REG_CON_CTRL2, \
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.apply_bit = TPS65023_REG_CTRL2_GO, \
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} \
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#define TPS65023_REGULATOR_LDO(_num, _t, _vm) \
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{ \
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.name = "LDO"#_num, \
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.of_match = of_match_ptr("LDO"#_num), \
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.regulators_node = of_match_ptr("regulators"), \
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.id = TPS65023_LDO_##_num, \
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.n_voltages = ARRAY_SIZE(_t), \
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.ops = &tps65023_ldo_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.volt_table = _t, \
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.vsel_reg = TPS65023_REG_LDO_CTRL, \
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.vsel_mask = _vm, \
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.enable_mask = 1 << (_num), \
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.enable_reg = TPS65023_REG_REG_CTRL, \
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} \
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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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/* PMIC details */
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struct tps_pmic {
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struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
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const struct tps_driver_data *driver_data;
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struct regmap *regmap;
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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 regulator_desc *desc;
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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->driver_data->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->driver_data->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 const struct regulator_desc tps65020_regulators[] = {
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TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20),
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TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10),
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TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08),
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TPS65023_REGULATOR_LDO(1, TPS65020_LDO_VSEL_table, 0x07),
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TPS65023_REGULATOR_LDO(2, TPS65020_LDO_VSEL_table, 0x70),
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};
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static const struct regulator_desc tps65021_regulators[] = {
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TPS65023_REGULATOR_DCDC(1, DCDC_FIXED_3300000_VSEL_table, 0x20),
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TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_1800000_VSEL_table, 0x10),
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TPS65023_REGULATOR_DCDC(3, VCORE_VSEL_table, 0x08),
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TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07),
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TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
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};
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static const struct regulator_desc tps65023_regulators[] = {
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TPS65023_REGULATOR_DCDC(1, VCORE_VSEL_table, 0x20),
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TPS65023_REGULATOR_DCDC(2, DCDC_FIXED_3300000_VSEL_table, 0x10),
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TPS65023_REGULATOR_DCDC(3, DCDC_FIXED_1800000_VSEL_table, 0x08),
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TPS65023_REGULATOR_LDO(1, TPS65023_LDO1_VSEL_table, 0x07),
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TPS65023_REGULATOR_LDO(2, TPS65023_LDO2_VSEL_table, 0x70),
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};
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static struct tps_driver_data tps65020_drv_data = {
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.desc = tps65020_regulators,
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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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.desc = tps65021_regulators,
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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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.desc = tps65023_regulators,
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.core_regulator = TPS65023_DCDC_1,
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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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struct regulator_init_data *init_data = dev_get_platdata(&client->dev);
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struct regulator_config config = { };
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struct tps_pmic *tps;
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int i;
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int error;
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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->driver_data = (struct tps_driver_data *)id->driver_data;
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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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config.dev = &client->dev;
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config.driver_data = tps;
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config.regmap = tps->regmap;
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for (i = 0; i < TPS65023_NUM_REGULATOR; i++) {
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if (init_data)
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config.init_data = &init_data[i];
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/* Register the regulators */
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tps->rdev[i] = devm_regulator_register(&client->dev,
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&tps->driver_data->desc[i], &config);
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if (IS_ERR(tps->rdev[i])) {
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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(tps->rdev[i]);
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}
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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, 0);
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return 0;
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}
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static const struct of_device_id tps65023_of_match[] = {
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{ .compatible = "ti,tps65020", .data = &tps65020_drv_data},
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{ .compatible = "ti,tps65021", .data = &tps65021_drv_data},
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{ .compatible = "ti,tps65023", .data = &tps65023_drv_data},
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{},
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};
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MODULE_DEVICE_TABLE(of, tps65023_of_match);
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static const struct i2c_device_id tps_65023_id[] = {
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{
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.name = "tps65023",
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.driver_data = (kernel_ulong_t)&tps65023_drv_data
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}, {
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.name = "tps65021",
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.driver_data = (kernel_ulong_t)&tps65021_drv_data
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}, {
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.name = "tps65020",
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.driver_data = (kernel_ulong_t)&tps65020_drv_data
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},
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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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.of_match_table = of_match_ptr(tps65023_of_match),
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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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