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/*
* tps65218-regulator.c
*
* Regulator driver for TPS65218 PMIC
*
* Copyright (C) 2014 Texas Instruments Incorporated - http://www.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.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/tps65218.h>
enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4,
DCDC5, DCDC6, LDO1, LS3 };
#define TPS65218_REGULATOR(_name, _id, _type, _ops, _n, _vr, _vm, _er, _em, \
_cr, _cm, _lr, _nlr, _delay, _fuv) \
{ \
.name = _name, \
.id = _id, \
.ops = &_ops, \
.n_voltages = _n, \
.type = _type, \
.owner = THIS_MODULE, \
.vsel_reg = _vr, \
.vsel_mask = _vm, \
.csel_reg = _cr, \
.csel_mask = _cm, \
.enable_reg = _er, \
.enable_mask = _em, \
.volt_table = NULL, \
.linear_ranges = _lr, \
.n_linear_ranges = _nlr, \
.ramp_delay = _delay, \
.fixed_uV = _fuv \
} \
#define TPS65218_INFO(_id, _nm, _min, _max) \
[_id] = { \
.id = _id, \
.name = _nm, \
.min_uV = _min, \
.max_uV = _max, \
}
static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
};
static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
};
static const struct regulator_linear_range dcdc4_ranges[] = {
REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
};
static struct tps_info tps65218_pmic_regs[] = {
TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000),
TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
TPS65218_INFO(LS3, "LS3", -1, -1),
};
#define TPS65218_OF_MATCH(comp, label) \
{ \
.compatible = comp, \
.data = &label, \
}
static const struct of_device_id tps65218_of_match[] = {
TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]),
{ }
};
MODULE_DEVICE_TABLE(of, tps65218_of_match);
static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
unsigned selector)
{
int ret;
struct tps65218 *tps = rdev_get_drvdata(dev);
unsigned int rid = rdev_get_id(dev);
/* Set the voltage based on vsel value and write protect level is 2 */
ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
selector, TPS65218_PROTECT_L1);
/* Set GO bit for DCDC1/2 to initiate voltage transistion */
switch (rid) {
case TPS65218_DCDC_1:
case TPS65218_DCDC_2:
ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
TPS65218_SLEW_RATE_GO,
TPS65218_SLEW_RATE_GO,
TPS65218_PROTECT_L1);
break;
}
return ret;
}
static int tps65218_pmic_enable(struct regulator_dev *dev)
{
struct tps65218 *tps = rdev_get_drvdata(dev);
int rid = rdev_get_id(dev);
if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
return -EINVAL;
/* Enable the regulator and password protection is level 1 */
return tps65218_set_bits(tps, dev->desc->enable_reg,
dev->desc->enable_mask, dev->desc->enable_mask,
TPS65218_PROTECT_L1);
}
static int tps65218_pmic_disable(struct regulator_dev *dev)
{
struct tps65218 *tps = rdev_get_drvdata(dev);
int rid = rdev_get_id(dev);
if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
return -EINVAL;
/* Disable the regulator and password protection is level 1 */
return tps65218_clear_bits(tps, dev->desc->enable_reg,
dev->desc->enable_mask, TPS65218_PROTECT_L1);
}
/* Operations permitted on DCDC1, DCDC2 */
static struct regulator_ops tps65218_dcdc12_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = tps65218_pmic_enable,
.disable = tps65218_pmic_disable,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = tps65218_pmic_set_voltage_sel,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
/* Operations permitted on DCDC3, DCDC4 and LDO1 */
static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = tps65218_pmic_enable,
.disable = tps65218_pmic_disable,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = tps65218_pmic_set_voltage_sel,
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
};
static const int ls3_currents[] = { 100, 200, 500, 1000 };
static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
int lim_uA)
{
unsigned int index = 0;
unsigned int num_currents = ARRAY_SIZE(ls3_currents);
struct tps65218 *tps = rdev_get_drvdata(dev);
while (index < num_currents && ls3_currents[index] != lim_uA)
index++;
if (index == num_currents)
return -EINVAL;
return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
index << 2, TPS65218_PROTECT_L1);
}
static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
int min_uA, int max_uA)
{
int index = 0;
unsigned int num_currents = ARRAY_SIZE(ls3_currents);
struct tps65218 *tps = rdev_get_drvdata(dev);
while (index < num_currents && ls3_currents[index] < max_uA)
index++;
index--;
if (index < 0 || ls3_currents[index] < min_uA)
return -EINVAL;
return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
index << 2, TPS65218_PROTECT_L1);
}
static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
{
int retval;
unsigned int index;
struct tps65218 *tps = rdev_get_drvdata(dev);
retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index);
if (retval < 0)
return retval;
index = (index & dev->desc->csel_mask) >> 2;
return ls3_currents[index];
}
static struct regulator_ops tps65218_ls3_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = tps65218_pmic_enable,
.disable = tps65218_pmic_disable,
.set_input_current_limit = tps65218_pmic_set_input_current_lim,
.set_current_limit = tps65218_pmic_set_current_limit,
.get_current_limit = tps65218_pmic_get_current_limit,
};
/* Operations permitted on DCDC5, DCDC6 */
static struct regulator_ops tps65218_dcdc56_pmic_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = tps65218_pmic_enable,
.disable = tps65218_pmic_disable,
};
static const struct regulator_desc regulators[] = {
TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE,
tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1,
TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
2, 4000, 0),
TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE,
tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2,
TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
2, 4000, 0),
TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE,
tps65218_ldo1_dcdc34_ops, 64,
<
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