2019-05-31 16:09:32 +08:00
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// SPDX-License-Identifier: GPL-2.0-only
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2017-05-23 20:16:55 +08:00
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/*
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* Regulator driver for LP87565 PMIC
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*
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2020-07-20 04:06:23 +08:00
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* Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
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2017-05-23 20:16:55 +08:00
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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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2021-02-20 06:39:10 +08:00
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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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2020-06-23 04:43:26 +08:00
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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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2017-05-23 20:16:55 +08:00
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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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2020-06-23 04:43:26 +08:00
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.enable_val = _ev, \
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2017-05-23 20:16:55 +08:00
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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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2019-03-01 14:24:32 +08:00
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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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2017-05-23 20:16:55 +08:00
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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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2020-05-08 23:43:36 +08:00
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static const struct linear_range buck0_1_2_3_ranges[] = {
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2017-06-20 11:36:55 +08:00
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REGULATOR_LINEAR_RANGE(600000, 0xA, 0x17, 10000),
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2017-05-23 20:16:55 +08:00
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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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2019-01-26 11:39:05 +08:00
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static const unsigned int lp87565_buck_ramp_delay[] = {
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2017-05-23 20:16:55 +08:00
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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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2019-09-08 11:57:20 +08:00
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ret = regmap_update_bits(rdev->regmap, regulators[id].ctrl2_reg,
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2017-05-23 20:16:55 +08:00
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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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2019-09-08 11:57:20 +08:00
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dev_err(&rdev->dev, "SLEW RATE write failed: %d\n", ret);
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2017-05-23 20:16:55 +08:00
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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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2018-04-17 16:18:11 +08:00
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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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2017-05-23 20:16:55 +08:00
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return 0;
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}
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2019-03-01 14:24:32 +08:00
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/* Operations permitted on BUCKs */
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2019-01-26 11:39:05 +08:00
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static const struct regulator_ops lp87565_buck_ops = {
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2017-05-23 20:16:55 +08:00
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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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2019-03-01 14:24:32 +08:00
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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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2017-05-23 20:16:55 +08:00
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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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2020-06-23 04:43:26 +08:00
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LP87565_BUCK_CTRL_1_EN |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
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2018-04-17 16:18:11 +08:00
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LP87565_BUCK_CTRL_1_EN, 3230,
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2017-05-23 20:16:55 +08:00
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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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2020-06-23 04:43:26 +08:00
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LP87565_BUCK_CTRL_1_EN |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
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2018-04-17 16:18:11 +08:00
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LP87565_BUCK_CTRL_1_EN, 3230,
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2017-05-23 20:16:55 +08:00
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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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2020-06-23 04:43:26 +08:00
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LP87565_BUCK_CTRL_1_EN |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
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2018-04-17 16:18:11 +08:00
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LP87565_BUCK_CTRL_1_EN, 3230,
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2017-05-23 20:16:55 +08:00
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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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2020-06-23 04:43:26 +08:00
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LP87565_BUCK_CTRL_1_EN |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
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2018-04-17 16:18:11 +08:00
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LP87565_BUCK_CTRL_1_EN, 3230,
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2017-05-23 20:16:55 +08:00
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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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2018-04-17 16:51:55 +08:00
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LP87565_BUCK_CTRL_1_EN |
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2020-06-23 04:43:26 +08:00
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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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2018-04-17 16:51:55 +08:00
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LP87565_BUCK_CTRL_1_FPWM_MP_0_2, 3230,
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2017-05-23 20:16:55 +08:00
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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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2020-06-23 04:43:26 +08:00
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LP87565_BUCK_CTRL_1_EN |
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LP87565_BUCK_CTRL_1_EN_PIN_CTRL,
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2018-04-17 16:18:11 +08:00
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LP87565_BUCK_CTRL_1_EN, 3230,
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2017-05-23 20:16:55 +08:00
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buck0_1_2_3_ranges, LP87565_REG_BUCK2_CTRL_2),
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2019-06-12 22:46:20 +08:00
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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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2020-06-23 04:43:26 +08:00
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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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2019-06-12 22:46:20 +08:00
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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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2017-05-23 20:16:55 +08:00
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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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2019-07-11 19:35:17 +08:00
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int i, min_idx, max_idx;
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2017-05-23 20:16:55 +08:00
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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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2019-06-12 22:46:20 +08:00
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switch (lp87565->dev_type) {
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case LP87565_DEVICE_TYPE_LP87565_Q1:
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2017-05-23 20:16:55 +08:00
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min_idx = LP87565_BUCK_10;
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max_idx = LP87565_BUCK_23;
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2019-06-12 22:46:20 +08:00
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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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2019-06-27 21:16:39 +08:00
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break;
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2019-06-12 22:46:20 +08:00
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default:
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2019-07-11 19:35:17 +08:00
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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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2017-05-23 20:16:55 +08:00
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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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regulator: Set PROBE_PREFER_ASYNCHRONOUS for drivers that existed in 4.14
Probing of regulators can be a slow operation and can contribute to
slower boot times. This is especially true if a regulator is turned on
at probe time (with regulator-boot-on or regulator-always-on) and the
regulator requires delays (off-on-time, ramp time, etc).
While the overall kernel is not ready to switch to async probe by
default, as per the discussion on the mailing lists [1] it is believed
that the regulator subsystem is in good shape and we can move
regulator drivers over wholesale. There is no way to just magically
opt in all regulators (regulators are just normal drivers like
platform_driver), so we set PROBE_PREFER_ASYNCHRONOUS for all
regulators found in 'drivers/regulator' individually.
Given the number of drivers touched and the impossibility to test this
ahead of time, it wouldn't be shocking at all if this caused a
regression for someone. If there is a regression caused by this patch,
it's likely to be one of the cases talked about in [1]. As a "quick
fix", drivers involved in the regression could be fixed by changing
them to PROBE_FORCE_SYNCHRONOUS. That being said, the correct fix
would be to directly fix the problem that caused the issue with async
probe.
The approach here follows a similar approach that was used for the mmc
subsystem several years ago [2]. In fact, I ran nearly the same python
script to auto-generate the changes. The only thing I changed was to
search for "i2c_driver", "spmi_driver", and "spi_driver" in addition
to "platform_driver".
[1] https://lore.kernel.org/r/06db017f-e985-4434-8d1d-02ca2100cca0@sirena.org.uk
[2] https://lore.kernel.org/r/20200903232441.2694866-1-dianders@chromium.org/
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20230316125351.1.I2a4677392a38db5758dee0788b2cea5872562a82@changeid
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-03-17 03:54:38 +08:00
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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2017-05-23 20:16:55 +08:00
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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 <j-keerthy@ti.com>");
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MODULE_DESCRIPTION("LP87565 voltage regulator driver");
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MODULE_LICENSE("GPL v2");
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