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410 lines
10 KiB
410 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// pv88090-regulator.c - Regulator device driver for PV88090 |
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// Copyright (C) 2015 Powerventure Semiconductor Ltd. |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.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/regmap.h> |
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#include <linux/irq.h> |
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#include <linux/interrupt.h> |
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#include <linux/regulator/of_regulator.h> |
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#include "pv88090-regulator.h" |
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#define PV88090_MAX_REGULATORS 5 |
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/* PV88090 REGULATOR IDs */ |
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enum { |
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/* BUCKs */ |
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PV88090_ID_BUCK1, |
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PV88090_ID_BUCK2, |
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PV88090_ID_BUCK3, |
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/* LDOs */ |
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PV88090_ID_LDO1, |
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PV88090_ID_LDO2, |
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}; |
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struct pv88090_regulator { |
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struct regulator_desc desc; |
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unsigned int conf; |
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unsigned int conf2; |
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}; |
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struct pv88090 { |
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struct device *dev; |
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struct regmap *regmap; |
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struct regulator_dev *rdev[PV88090_MAX_REGULATORS]; |
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}; |
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struct pv88090_buck_voltage { |
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int min_uV; |
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int max_uV; |
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int uV_step; |
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}; |
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static const struct regmap_config pv88090_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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}; |
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/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3. |
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* Entry indexes corresponds to register values. |
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*/ |
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static const unsigned int pv88090_buck1_limits[] = { |
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220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000, |
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1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000, |
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3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000, |
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5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000 |
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}; |
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static const unsigned int pv88090_buck23_limits[] = { |
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1496000, 2393000, 3291000, 4189000 |
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}; |
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static const struct pv88090_buck_voltage pv88090_buck_vol[3] = { |
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{ |
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.min_uV = 600000, |
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.max_uV = 1393750, |
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.uV_step = 6250, |
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}, |
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{ |
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.min_uV = 1400000, |
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.max_uV = 2193750, |
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.uV_step = 6250, |
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}, |
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{ |
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.min_uV = 1250000, |
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.max_uV = 2837500, |
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.uV_step = 12500, |
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}, |
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}; |
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static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev) |
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{ |
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struct pv88090_regulator *info = rdev_get_drvdata(rdev); |
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unsigned int data; |
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int ret, mode = 0; |
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ret = regmap_read(rdev->regmap, info->conf, &data); |
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if (ret < 0) |
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return ret; |
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switch (data & PV88090_BUCK1_MODE_MASK) { |
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case PV88090_BUCK_MODE_SYNC: |
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mode = REGULATOR_MODE_FAST; |
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break; |
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case PV88090_BUCK_MODE_AUTO: |
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mode = REGULATOR_MODE_NORMAL; |
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break; |
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case PV88090_BUCK_MODE_SLEEP: |
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mode = REGULATOR_MODE_STANDBY; |
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break; |
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} |
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return mode; |
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} |
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static int pv88090_buck_set_mode(struct regulator_dev *rdev, |
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unsigned int mode) |
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{ |
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struct pv88090_regulator *info = rdev_get_drvdata(rdev); |
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int val = 0; |
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switch (mode) { |
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case REGULATOR_MODE_FAST: |
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val = PV88090_BUCK_MODE_SYNC; |
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break; |
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case REGULATOR_MODE_NORMAL: |
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val = PV88090_BUCK_MODE_AUTO; |
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break; |
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case REGULATOR_MODE_STANDBY: |
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val = PV88090_BUCK_MODE_SLEEP; |
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break; |
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default: |
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return -EINVAL; |
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} |
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return regmap_update_bits(rdev->regmap, info->conf, |
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PV88090_BUCK1_MODE_MASK, val); |
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} |
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static const struct regulator_ops pv88090_buck_ops = { |
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.get_mode = pv88090_buck_get_mode, |
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.set_mode = pv88090_buck_set_mode, |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.list_voltage = regulator_list_voltage_linear, |
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.set_current_limit = regulator_set_current_limit_regmap, |
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.get_current_limit = regulator_get_current_limit_regmap, |
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}; |
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static const struct regulator_ops pv88090_ldo_ops = { |
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.enable = regulator_enable_regmap, |
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.disable = regulator_disable_regmap, |
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.is_enabled = regulator_is_enabled_regmap, |
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.set_voltage_sel = regulator_set_voltage_sel_regmap, |
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.get_voltage_sel = regulator_get_voltage_sel_regmap, |
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.list_voltage = regulator_list_voltage_linear, |
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}; |
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#define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \ |
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{\ |
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.desc = {\ |
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.id = chip##_ID_##regl_name,\ |
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.name = __stringify(chip##_##regl_name),\ |
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.of_match = of_match_ptr(#regl_name),\ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.type = REGULATOR_VOLTAGE,\ |
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.owner = THIS_MODULE,\ |
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.ops = &pv88090_buck_ops,\ |
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.min_uV = min, \ |
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.uV_step = step, \ |
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.n_voltages = ((max) - (min))/(step) + 1, \ |
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.enable_reg = PV88090_REG_##regl_name##_CONF0, \ |
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.enable_mask = PV88090_##regl_name##_EN, \ |
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.vsel_reg = PV88090_REG_##regl_name##_CONF0, \ |
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.vsel_mask = PV88090_V##regl_name##_MASK, \ |
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.curr_table = limits_array, \ |
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.n_current_limits = ARRAY_SIZE(limits_array), \ |
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.csel_reg = PV88090_REG_##regl_name##_CONF1, \ |
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.csel_mask = PV88090_##regl_name##_ILIM_MASK, \ |
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},\ |
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.conf = PV88090_REG_##regl_name##_CONF1, \ |
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.conf2 = PV88090_REG_##regl_name##_CONF2, \ |
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} |
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#define PV88090_LDO(chip, regl_name, min, step, max) \ |
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{\ |
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.desc = {\ |
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.id = chip##_ID_##regl_name,\ |
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.name = __stringify(chip##_##regl_name),\ |
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.of_match = of_match_ptr(#regl_name),\ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.type = REGULATOR_VOLTAGE,\ |
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.owner = THIS_MODULE,\ |
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.ops = &pv88090_ldo_ops,\ |
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.min_uV = min, \ |
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.uV_step = step, \ |
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.n_voltages = ((max) - (min))/(step) + 1, \ |
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.enable_reg = PV88090_REG_##regl_name##_CONT, \ |
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.enable_mask = PV88090_##regl_name##_EN, \ |
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.vsel_reg = PV88090_REG_##regl_name##_CONT, \ |
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.vsel_mask = PV88090_V##regl_name##_MASK, \ |
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},\ |
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} |
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static struct pv88090_regulator pv88090_regulator_info[] = { |
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PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750, |
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pv88090_buck1_limits), |
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PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750, |
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pv88090_buck23_limits), |
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PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750, |
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pv88090_buck23_limits), |
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PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000), |
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PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000), |
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}; |
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static irqreturn_t pv88090_irq_handler(int irq, void *data) |
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{ |
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struct pv88090 *chip = data; |
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int i, reg_val, err, ret = IRQ_NONE; |
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err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val); |
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if (err < 0) |
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goto error_i2c; |
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if (reg_val & PV88090_E_VDD_FLT) { |
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for (i = 0; i < PV88090_MAX_REGULATORS; i++) { |
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if (chip->rdev[i] != NULL) |
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regulator_notifier_call_chain(chip->rdev[i], |
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REGULATOR_EVENT_UNDER_VOLTAGE, |
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NULL); |
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} |
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err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
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PV88090_E_VDD_FLT); |
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if (err < 0) |
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goto error_i2c; |
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ret = IRQ_HANDLED; |
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} |
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if (reg_val & PV88090_E_OVER_TEMP) { |
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for (i = 0; i < PV88090_MAX_REGULATORS; i++) { |
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if (chip->rdev[i] != NULL) |
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regulator_notifier_call_chain(chip->rdev[i], |
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REGULATOR_EVENT_OVER_TEMP, |
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NULL); |
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} |
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err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
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PV88090_E_OVER_TEMP); |
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if (err < 0) |
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goto error_i2c; |
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ret = IRQ_HANDLED; |
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} |
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return ret; |
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error_i2c: |
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dev_err(chip->dev, "I2C error : %d\n", err); |
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return IRQ_NONE; |
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} |
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/* |
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* I2C driver interface functions |
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*/ |
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static int pv88090_i2c_probe(struct i2c_client *i2c) |
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{ |
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struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); |
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struct pv88090 *chip; |
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struct regulator_config config = { }; |
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int error, i, ret = 0; |
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unsigned int conf2, range, index; |
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chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL); |
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if (!chip) |
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return -ENOMEM; |
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chip->dev = &i2c->dev; |
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chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config); |
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if (IS_ERR(chip->regmap)) { |
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error = PTR_ERR(chip->regmap); |
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dev_err(chip->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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i2c_set_clientdata(i2c, chip); |
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if (i2c->irq != 0) { |
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ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF); |
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if (ret < 0) { |
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dev_err(chip->dev, |
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"Failed to mask A reg: %d\n", ret); |
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return ret; |
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} |
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ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF); |
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if (ret < 0) { |
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dev_err(chip->dev, |
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"Failed to mask B reg: %d\n", ret); |
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return ret; |
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} |
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ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
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pv88090_irq_handler, |
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IRQF_TRIGGER_LOW|IRQF_ONESHOT, |
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"pv88090", chip); |
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if (ret != 0) { |
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dev_err(chip->dev, "Failed to request IRQ: %d\n", |
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i2c->irq); |
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return ret; |
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} |
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ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A, |
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PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0); |
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if (ret < 0) { |
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dev_err(chip->dev, |
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"Failed to update mask reg: %d\n", ret); |
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return ret; |
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} |
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} else { |
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dev_warn(chip->dev, "No IRQ configured\n"); |
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} |
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config.dev = chip->dev; |
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config.regmap = chip->regmap; |
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for (i = 0; i < PV88090_MAX_REGULATORS; i++) { |
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if (init_data) |
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config.init_data = &init_data[i]; |
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if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) { |
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ret = regmap_read(chip->regmap, |
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pv88090_regulator_info[i].conf2, &conf2); |
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if (ret < 0) |
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return ret; |
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conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) & |
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PV88090_BUCK_VDAC_RANGE_MASK; |
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ret = regmap_read(chip->regmap, |
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PV88090_REG_BUCK_FOLD_RANGE, &range); |
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if (ret < 0) |
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return ret; |
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range = (range >> |
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(PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) & |
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PV88090_BUCK_VRANGE_GAIN_MASK; |
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index = ((range << 1) | conf2); |
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if (index > PV88090_ID_BUCK3) { |
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dev_err(chip->dev, |
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"Invalid index(%d)\n", index); |
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return -EINVAL; |
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} |
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pv88090_regulator_info[i].desc.min_uV |
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= pv88090_buck_vol[index].min_uV; |
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pv88090_regulator_info[i].desc.uV_step |
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= pv88090_buck_vol[index].uV_step; |
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pv88090_regulator_info[i].desc.n_voltages |
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= ((pv88090_buck_vol[index].max_uV) |
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- (pv88090_buck_vol[index].min_uV)) |
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/(pv88090_buck_vol[index].uV_step) + 1; |
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} |
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config.driver_data = (void *)&pv88090_regulator_info[i]; |
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chip->rdev[i] = devm_regulator_register(chip->dev, |
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&pv88090_regulator_info[i].desc, &config); |
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if (IS_ERR(chip->rdev[i])) { |
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dev_err(chip->dev, |
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"Failed to register PV88090 regulator\n"); |
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return PTR_ERR(chip->rdev[i]); |
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} |
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} |
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return 0; |
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} |
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static const struct i2c_device_id pv88090_i2c_id[] = { |
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{"pv88090", 0}, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id); |
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#ifdef CONFIG_OF |
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static const struct of_device_id pv88090_dt_ids[] = { |
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{ .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] }, |
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{}, |
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}; |
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MODULE_DEVICE_TABLE(of, pv88090_dt_ids); |
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#endif |
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static struct i2c_driver pv88090_regulator_driver = { |
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.driver = { |
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.name = "pv88090", |
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.of_match_table = of_match_ptr(pv88090_dt_ids), |
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}, |
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.probe_new = pv88090_i2c_probe, |
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.id_table = pv88090_i2c_id, |
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}; |
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module_i2c_driver(pv88090_regulator_driver); |
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MODULE_AUTHOR("James Ban <[email protected]>"); |
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MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090"); |
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MODULE_LICENSE("GPL");
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