256 lines
8.0 KiB
C
256 lines
8.0 KiB
C
/*
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* Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
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*
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* Author: Andrew F. Davis <afd@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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether expressed or implied; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License version 2 for more details.
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*
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* Based on the TPS65912 driver
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*/
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#include <linux/module.h>
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#include <linux/of.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/mfd/tps65086.h>
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enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1,
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LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT };
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#define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm) \
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[_id] = { \
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.desc = { \
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.name = _name, \
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.of_match = of_match_ptr(_of), \
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.regulators_node = "regulators", \
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.of_parse_cb = tps65086_of_parse_cb, \
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.id = _id, \
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.ops = ®_ops, \
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.n_voltages = _nv, \
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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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.volt_table = NULL, \
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.linear_ranges = _lr, \
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.n_linear_ranges = ARRAY_SIZE(_lr), \
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}, \
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.decay_reg = _dr, \
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.decay_mask = _dm, \
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}
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#define TPS65086_SWITCH(_name, _of, _id, _er, _em) \
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[_id] = { \
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.desc = { \
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.name = _name, \
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.of_match = of_match_ptr(_of), \
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.regulators_node = "regulators", \
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.of_parse_cb = tps65086_of_parse_cb, \
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.id = _id, \
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.ops = &switch_ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.enable_reg = _er, \
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.enable_mask = _em, \
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}, \
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}
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struct tps65086_regulator {
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struct regulator_desc desc;
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unsigned int decay_reg;
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unsigned int decay_mask;
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};
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static const struct linear_range tps65086_10mv_ranges[] = {
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REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
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REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000),
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};
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static const struct linear_range tps65086_buck126_25mv_ranges[] = {
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REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
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REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0),
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REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000),
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};
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static const struct linear_range tps65086_buck345_25mv_ranges[] = {
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REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0),
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REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000),
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};
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static const struct linear_range tps65086_ldoa1_ranges[] = {
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REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0),
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REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000),
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REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000),
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REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000),
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REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0),
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};
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static const struct linear_range tps65086_ldoa23_ranges[] = {
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REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000),
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REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000),
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};
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/* Operations permitted on regulators */
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static const struct regulator_ops reg_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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.map_voltage = regulator_map_voltage_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.list_voltage = regulator_list_voltage_linear_range,
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};
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/* Operations permitted on load switches */
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static const struct regulator_ops switch_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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};
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static int tps65086_of_parse_cb(struct device_node *dev,
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const struct regulator_desc *desc,
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struct regulator_config *config);
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static struct tps65086_regulator regulators[] = {
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TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL,
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BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0),
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tps65086_10mv_ranges, TPS65086_BUCK1CTRL,
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BIT(0)),
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TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL,
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BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1),
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tps65086_10mv_ranges, TPS65086_BUCK2CTRL,
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BIT(0)),
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TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID,
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BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2),
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tps65086_10mv_ranges, TPS65086_BUCK3DECAY,
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BIT(0)),
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TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID,
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BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0),
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tps65086_10mv_ranges, TPS65086_BUCK4VID,
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BIT(0)),
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TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID,
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BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0),
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tps65086_10mv_ranges, TPS65086_BUCK5CTRL,
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BIT(0)),
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TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID,
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BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0),
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tps65086_10mv_ranges, TPS65086_BUCK6CTRL,
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BIT(0)),
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TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL,
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VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0),
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tps65086_ldoa1_ranges, 0, 0),
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TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID,
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VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0),
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tps65086_ldoa23_ranges, 0, 0),
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TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID,
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VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0),
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tps65086_ldoa23_ranges, 0, 0),
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TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)),
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TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)),
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TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)),
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TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)),
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};
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static int tps65086_of_parse_cb(struct device_node *node,
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const struct regulator_desc *desc,
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struct regulator_config *config)
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{
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int ret;
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/* Check for 25mV step mode */
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if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) {
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switch (desc->id) {
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case BUCK1:
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case BUCK2:
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case BUCK6:
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regulators[desc->id].desc.linear_ranges =
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tps65086_buck126_25mv_ranges;
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regulators[desc->id].desc.n_linear_ranges =
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ARRAY_SIZE(tps65086_buck126_25mv_ranges);
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break;
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case BUCK3:
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case BUCK4:
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case BUCK5:
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regulators[desc->id].desc.linear_ranges =
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tps65086_buck345_25mv_ranges;
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regulators[desc->id].desc.n_linear_ranges =
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ARRAY_SIZE(tps65086_buck345_25mv_ranges);
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break;
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default:
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dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n");
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}
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}
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/* Check for decay mode */
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if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) {
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ret = regmap_write_bits(config->regmap,
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regulators[desc->id].decay_reg,
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regulators[desc->id].decay_mask,
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regulators[desc->id].decay_mask);
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if (ret) {
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dev_err(config->dev, "Error setting decay\n");
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return ret;
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}
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}
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return 0;
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}
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static int tps65086_regulator_probe(struct platform_device *pdev)
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{
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struct tps65086 *tps = 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;
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platform_set_drvdata(pdev, tps);
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config.dev = &pdev->dev;
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config.dev->of_node = tps->dev->of_node;
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config.driver_data = tps;
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config.regmap = tps->regmap;
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for (i = 0; i < ARRAY_SIZE(regulators); 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(tps->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 tps65086_regulator_id_table[] = {
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{ "tps65086-regulator", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table);
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static struct platform_driver tps65086_regulator_driver = {
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.driver = {
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.name = "tps65086-regulator",
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.probe_type = PROBE_PREFER_ASYNCHRONOUS,
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},
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.probe = tps65086_regulator_probe,
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.id_table = tps65086_regulator_id_table,
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};
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module_platform_driver(tps65086_regulator_driver);
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MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
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MODULE_DESCRIPTION("TPS65086 Regulator driver");
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MODULE_LICENSE("GPL v2");
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