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