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365 lines
10 KiB
365 lines
10 KiB
/* |
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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 - https://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 __maybe_unused 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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