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248 lines
7.3 KiB
248 lines
7.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Regulator driver for LP87565 PMIC |
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* |
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* Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/ |
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*/ |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/mfd/lp87565.h> |
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enum LP87565_regulator_id { |
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/* BUCK's */ |
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LP87565_BUCK_0, |
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LP87565_BUCK_1, |
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LP87565_BUCK_2, |
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LP87565_BUCK_3, |
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LP87565_BUCK_10, |
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LP87565_BUCK_23, |
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LP87565_BUCK_3210, |
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}; |
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#define LP87565_REGULATOR(_name, _id, _of, _ops, _n, _vr, _vm, \ |
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_er, _em, _ev, _delay, _lr, _cr) \ |
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[_id] = { \ |
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.desc = { \ |
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.name = _name, \ |
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.supply_name = _of "-in", \ |
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.id = _id, \ |
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.of_match = of_match_ptr(_of), \ |
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.regulators_node = of_match_ptr("regulators"),\ |
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.ops = &_ops, \ |
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.n_voltages = _n, \ |
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.type = REGULATOR_VOLTAGE, \ |
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.owner = THIS_MODULE, \ |
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.vsel_reg = _vr, \ |
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.vsel_mask = _vm, \ |
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.enable_reg = _er, \ |
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.enable_mask = _em, \ |
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.enable_val = _ev, \ |
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.ramp_delay = _delay, \ |
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.linear_ranges = _lr, \ |
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.n_linear_ranges = ARRAY_SIZE(_lr), \ |
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.curr_table = lp87565_buck_uA, \ |
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.n_current_limits = ARRAY_SIZE(lp87565_buck_uA),\ |
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.csel_reg = (_cr), \ |
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.csel_mask = LP87565_BUCK_CTRL_2_ILIM, \ |
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}, \ |
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.ctrl2_reg = _cr, \ |
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} |
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struct lp87565_regulator { |
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struct regulator_desc desc; |
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unsigned int ctrl2_reg; |
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}; |
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static const struct lp87565_regulator regulators[]; |
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static const struct linear_range buck0_1_2_3_ranges[] = { |
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REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000), |
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REGULATOR_LINEAR_RANGE(735000, 0x18, 0x9d, 5000), |
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REGULATOR_LINEAR_RANGE(1420000, 0x9e, 0xff, 20000), |
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}; |
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static const unsigned int lp87565_buck_ramp_delay[] = { |
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30000, 15000, 10000, 7500, 3800, 1900, 940, 470 |
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}; |
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/* LP87565 BUCK current limit */ |
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static const unsigned int lp87565_buck_uA[] = { |
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1500000, 2000000, 2500000, 3000000, 3500000, 4000000, 4500000, 5000000, |
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}; |
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static int lp87565_buck_set_ramp_delay(struct regulator_dev *rdev, |
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int ramp_delay) |
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{ |
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int id = rdev_get_id(rdev); |
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unsigned int reg; |
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int ret; |
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if (ramp_delay <= 470) |
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reg = 7; |
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else if (ramp_delay <= 940) |
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reg = 6; |
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else if (ramp_delay <= 1900) |
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reg = 5; |
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else if (ramp_delay <= 3800) |
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reg = 4; |
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else if (ramp_delay <= 7500) |
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reg = 3; |
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else if (ramp_delay <= 10000) |
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reg = 2; |
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else if (ramp_delay <= 15000) |
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reg = 1; |
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else |
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reg = 0; |
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ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg, |
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LP87565_BUCK_CTRL_2_SLEW_RATE, |
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reg << __ffs(LP87565_BUCK_CTRL_2_SLEW_RATE)); |
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if (ret) { |
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dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret); |
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return ret; |
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} |
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rdev->constraints->ramp_delay = lp87565_buck_ramp_delay[reg]; |
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/* Conservatively give a 15% margin */ |
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rdev->constraints->ramp_delay = |
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rdev->constraints->ramp_delay * 85 / 100; |
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return 0; |
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} |
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/* Operations permitted on BUCKs */ |
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static const struct regulator_ops lp87565_buck_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_linear_range, |
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.map_voltage = regulator_map_voltage_linear_range, |
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.set_voltage_time_sel = regulator_set_voltage_time_sel, |
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.set_ramp_delay = lp87565_buck_set_ramp_delay, |
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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 lp87565_regulator regulators[] = { |
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LP87565_REGULATOR("BUCK0", LP87565_BUCK_0, "buck0", lp87565_buck_ops, |
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256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, |
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LP87565_REG_BUCK0_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL, |
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LP87565_BUCK_CTRL_1_EN, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
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LP87565_REGULATOR("BUCK1", LP87565_BUCK_1, "buck1", lp87565_buck_ops, |
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256, LP87565_REG_BUCK1_VOUT, LP87565_BUCK_VSET, |
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LP87565_REG_BUCK1_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL, |
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LP87565_BUCK_CTRL_1_EN, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK1_CTRL_2), |
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LP87565_REGULATOR("BUCK2", LP87565_BUCK_2, "buck2", lp87565_buck_ops, |
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256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, |
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LP87565_REG_BUCK2_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL, |
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LP87565_BUCK_CTRL_1_EN, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
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LP87565_REGULATOR("BUCK3", LP87565_BUCK_3, "buck3", lp87565_buck_ops, |
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256, LP87565_REG_BUCK3_VOUT, LP87565_BUCK_VSET, |
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LP87565_REG_BUCK3_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL, |
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LP87565_BUCK_CTRL_1_EN, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK3_CTRL_2), |
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LP87565_REGULATOR("BUCK10", LP87565_BUCK_10, "buck10", lp87565_buck_ops, |
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256, LP87565_REG_BUCK0_VOUT, LP87565_BUCK_VSET, |
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LP87565_REG_BUCK0_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL | |
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LP87565_BUCK_CTRL_1_FPWM_MP_0_2, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
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LP87565_REGULATOR("BUCK23", LP87565_BUCK_23, "buck23", lp87565_buck_ops, |
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256, LP87565_REG_BUCK2_VOUT, LP87565_BUCK_VSET, |
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LP87565_REG_BUCK2_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL, |
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LP87565_BUCK_CTRL_1_EN, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2), |
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LP87565_REGULATOR("BUCK3210", LP87565_BUCK_3210, "buck3210", |
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lp87565_buck_ops, 256, LP87565_REG_BUCK0_VOUT, |
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LP87565_BUCK_VSET, LP87565_REG_BUCK0_CTRL_1, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL | |
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LP87565_BUCK_CTRL_1_FPWM_MP_0_2, |
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LP87565_BUCK_CTRL_1_EN | |
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LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230, |
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buck0_1_2_3_ranges, LP87565_REG_BUCK0_CTRL_2), |
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}; |
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static int lp87565_regulator_probe(struct platform_device *pdev) |
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{ |
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struct lp87565 *lp87565 = dev_get_drvdata(pdev->dev.parent); |
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struct regulator_config config = { }; |
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struct regulator_dev *rdev; |
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int i, min_idx, max_idx; |
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platform_set_drvdata(pdev, lp87565); |
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config.dev = &pdev->dev; |
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config.dev->of_node = lp87565->dev->of_node; |
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config.driver_data = lp87565; |
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config.regmap = lp87565->regmap; |
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switch (lp87565->dev_type) { |
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case LP87565_DEVICE_TYPE_LP87565_Q1: |
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min_idx = LP87565_BUCK_10; |
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max_idx = LP87565_BUCK_23; |
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break; |
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case LP87565_DEVICE_TYPE_LP87561_Q1: |
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min_idx = LP87565_BUCK_3210; |
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max_idx = LP87565_BUCK_3210; |
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break; |
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default: |
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min_idx = LP87565_BUCK_0; |
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max_idx = LP87565_BUCK_3; |
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break; |
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} |
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for (i = min_idx; i <= max_idx; i++) { |
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rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, |
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&config); |
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if (IS_ERR(rdev)) { |
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dev_err(lp87565->dev, "failed to register %s regulator\n", |
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pdev->name); |
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return PTR_ERR(rdev); |
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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 platform_device_id lp87565_regulator_id_table[] = { |
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{ "lp87565-regulator", }, |
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{ "lp87565-q1-regulator", }, |
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{ /* sentinel */ } |
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}; |
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MODULE_DEVICE_TABLE(platform, lp87565_regulator_id_table); |
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static struct platform_driver lp87565_regulator_driver = { |
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.driver = { |
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.name = "lp87565-pmic", |
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}, |
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.probe = lp87565_regulator_probe, |
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.id_table = lp87565_regulator_id_table, |
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}; |
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module_platform_driver(lp87565_regulator_driver); |
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MODULE_AUTHOR("J Keerthy <[email protected]>"); |
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MODULE_DESCRIPTION("LP87565 voltage regulator driver"); |
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MODULE_LICENSE("GPL v2");
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