lineage_kernel_xcoverpro/drivers/regulator/s2mpb02-regulator.c

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2023-06-18 22:53:49 +00:00
/*
* s2mpb02_regulator.c - Regulator driver for the Samsung s2mpb02
*
* Copyright (C) 2014 Samsung Electronics
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <linux/module.h>
#include <linux/bug.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/s2mpb02.h>
#include <linux/mfd/s2mpb02-regulator.h>
#include <linux/regulator/of_regulator.h>
struct s2mpb02_data {
struct s2mpb02_dev *iodev;
int num_regulators;
struct regulator_dev *rdev[S2MPB02_REGULATOR_MAX];
int opmode[S2MPB02_REGULATOR_MAX];
};
static int s2m_enable(struct regulator_dev *rdev)
{
struct s2mpb02_data *info = rdev_get_drvdata(rdev);
struct i2c_client *i2c = info->iodev->i2c;
return s2mpb02_update_reg(i2c, rdev->desc->enable_reg,
info->opmode[rdev_get_id(rdev)],
rdev->desc->enable_mask);
}
static int s2m_disable_regmap(struct regulator_dev *rdev)
{
struct s2mpb02_data *info = rdev_get_drvdata(rdev);
struct i2c_client *i2c = info->iodev->i2c;
u8 val;
if (rdev->desc->enable_is_inverted)
val = rdev->desc->enable_mask;
else
val = 0;
return s2mpb02_update_reg(i2c, rdev->desc->enable_reg,
val, rdev->desc->enable_mask);
}
static int s2m_is_enabled_regmap(struct regulator_dev *rdev)
{
struct s2mpb02_data *info = rdev_get_drvdata(rdev);
struct i2c_client *i2c = info->iodev->i2c;
int ret;
u8 val;
ret = s2mpb02_read_reg(i2c, rdev->desc->enable_reg, &val);
if (ret < 0)
return ret;
if (rdev->desc->enable_is_inverted)
return (val & rdev->desc->enable_mask) == 0;
else
return (val & rdev->desc->enable_mask) != 0;
}
static int s2m_get_voltage_sel_regmap(struct regulator_dev *rdev)
{
struct s2mpb02_data *info = rdev_get_drvdata(rdev);
struct i2c_client *i2c = info->iodev->i2c;
int ret;
u8 val;
ret = s2mpb02_read_reg(i2c, rdev->desc->vsel_reg, &val);
if (ret < 0)
return ret;
val &= rdev->desc->vsel_mask;
return val;
}
static int s2m_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
{
struct s2mpb02_data *info = rdev_get_drvdata(rdev);
struct i2c_client *i2c = info->iodev->i2c;
int ret;
ret = s2mpb02_update_reg(i2c, rdev->desc->vsel_reg,
sel, rdev->desc->vsel_mask);
if (ret < 0)
goto out;
if (rdev->desc->apply_bit)
ret = s2mpb02_update_reg(i2c, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
return ret;
out:
pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
return ret;
}
static int s2m_set_voltage_sel_regmap_buck(struct regulator_dev *rdev,
unsigned sel)
{
struct s2mpb02_data *info = rdev_get_drvdata(rdev);
struct i2c_client *i2c = info->iodev->i2c;
int ret;
ret = s2mpb02_write_reg(i2c, rdev->desc->vsel_reg, sel);
if (ret < 0)
goto out;
if (rdev->desc->apply_bit)
ret = s2mpb02_update_reg(i2c, rdev->desc->apply_reg,
rdev->desc->apply_bit,
rdev->desc->apply_bit);
return ret;
out:
pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
return ret;
}
static int s2m_set_voltage_time_sel(struct regulator_dev *rdev,
unsigned int old_selector,
unsigned int new_selector)
{
int old_volt, new_volt;
/* sanity check */
if (!rdev->desc->ops->list_voltage)
return -EINVAL;
old_volt = rdev->desc->ops->list_voltage(rdev, old_selector);
new_volt = rdev->desc->ops->list_voltage(rdev, new_selector);
if (old_selector < new_selector)
return DIV_ROUND_UP(new_volt - old_volt, S2MPB02_RAMP_DELAY);
return 0;
}
static struct regulator_ops s2mpb02_ldo_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = s2m_is_enabled_regmap,
.enable = s2m_enable,
.disable = s2m_disable_regmap,
.get_voltage_sel = s2m_get_voltage_sel_regmap,
.set_voltage_sel = s2m_set_voltage_sel_regmap,
.set_voltage_time_sel = s2m_set_voltage_time_sel,
};
static struct regulator_ops s2mpb02_buck_ops = {
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.is_enabled = s2m_is_enabled_regmap,
.enable = s2m_enable,
.disable = s2m_disable_regmap,
.get_voltage_sel = s2m_get_voltage_sel_regmap,
.set_voltage_sel = s2m_set_voltage_sel_regmap_buck,
.set_voltage_time_sel = s2m_set_voltage_time_sel,
};
#define _BUCK(macro) S2MPB02_BUCK##macro
#define _buck_ops(num) s2mpb02_buck_ops##num
#define _LDO(macro) S2MPB02_LDO##macro
#define _REG(ctrl) S2MPB02_REG##ctrl
#define _ldo_ops(num) s2mpb02_ldo_ops##num
#define _TIME(macro) S2MPB02_ENABLE_TIME##macro
#define BUCK_DESC(_name, _id, _ops, m, s, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = m, \
.uV_step = s, \
.n_voltages = S2MPB02_BUCK_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPB02_BUCK_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPB02_BUCK_ENABLE_MASK, \
.enable_time = t \
}
#define LDO_DESC(_name, _id, _ops, m, s, v, e, t) { \
.name = _name, \
.id = _id, \
.ops = _ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.min_uV = m, \
.uV_step = s, \
.n_voltages = S2MPB02_LDO_N_VOLTAGES, \
.vsel_reg = v, \
.vsel_mask = S2MPB02_LDO_VSEL_MASK, \
.enable_reg = e, \
.enable_mask = S2MPB02_LDO_ENABLE_MASK, \
.enable_time = t \
}
static struct regulator_desc regulators[S2MPB02_REGULATOR_MAX] = {
/* name, id, ops, min_uv, uV_step, vsel_reg, enable_reg */
LDO_DESC("s2mpb02-ldo1", _LDO(1), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_L1CTRL),
_REG(_L1CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo2", _LDO(2), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_L2CTRL),
_REG(_L2CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo3", _LDO(3), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_L3CTRL),
_REG(_L3CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo4", _LDO(4), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_L4CTRL),
_REG(_L4CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo5", _LDO(5), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP1), _REG(_L5CTRL),
_REG(_L5CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo6", _LDO(6), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L6CTRL),
_REG(_L6CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo7", _LDO(7), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L7CTRL),
_REG(_L7CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo8", _LDO(8), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L8CTRL),
_REG(_L8CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo9", _LDO(9), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L9CTRL),
_REG(_L9CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo10", _LDO(10), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L10CTRL),
_REG(_L10CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo11", _LDO(11), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L11CTRL),
_REG(_L11CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo12", _LDO(12), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L12CTRL),
_REG(_L12CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo13", _LDO(13), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L13CTRL),
_REG(_L13CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo14", _LDO(14), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L14CTRL),
_REG(_L14CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo15", _LDO(15), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L15CTRL),
_REG(_L15CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo16", _LDO(16), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L16CTRL),
_REG(_L16CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo17", _LDO(17), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L17CTRL),
_REG(_L17CTRL), _TIME(_LDO)),
LDO_DESC("s2mpb02-ldo18", _LDO(18), &_ldo_ops(), _LDO(_MIN1),
_LDO(_STEP2), _REG(_L18CTRL),
_REG(_L18CTRL), _TIME(_LDO)),
BUCK_DESC("s2mpb02-buck1", _BUCK(1), &_buck_ops(), _BUCK(_MIN1),
_BUCK(_STEP1), _REG(_B1CTRL2),
_REG(_B1CTRL1), _TIME(_BUCK)),
BUCK_DESC("s2mpb02-buck2", _BUCK(2), &_buck_ops(), _BUCK(_MIN1),
_BUCK(_STEP1), _REG(_B2CTRL2),
_REG(_B2CTRL1), _TIME(_BUCK)),
BUCK_DESC("s2mpb02-bb", S2MPB02_BB1, &_buck_ops(), _BUCK(_MIN2),
_BUCK(_STEP2), _REG(_BB1CTRL2),
_REG(_BB1CTRL1), _TIME(_BB)),
};
#ifdef CONFIG_OF
static int s2mpb02_pmic_dt_parse_pdata(struct s2mpb02_dev *iodev,
struct s2mpb02_platform_data *pdata)
{
struct device_node *pmic_np, *regulators_np, *reg_np;
struct s2mpb02_regulator_data *rdata;
unsigned int i;
pmic_np = iodev->dev->of_node;
if (!pmic_np) {
dev_err(iodev->dev, "could not find pmic sub-node\n");
return -ENODEV;
}
regulators_np = of_find_node_by_name(pmic_np, "regulators");
if (!regulators_np) {
dev_err(iodev->dev, "could not find regulators sub-node\n");
return -EINVAL;
}
/* count the number of regulators to be supported in pmic */
pdata->num_regulators = 0;
for_each_child_of_node(regulators_np, reg_np) {
pdata->num_regulators++;
}
rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *
pdata->num_regulators, GFP_KERNEL);
if (!rdata) {
dev_err(iodev->dev,
"could not allocate memory for regulator data\n");
return -ENOMEM;
}
pdata->regulators = rdata;
for_each_child_of_node(regulators_np, reg_np) {
for (i = 0; i < ARRAY_SIZE(regulators); i++)
if (!of_node_cmp(reg_np->name,
regulators[i].name))
break;
if (i == ARRAY_SIZE(regulators)) {
dev_warn(iodev->dev,
"don't know how to configure regulator %s\n",
reg_np->name);
continue;
}
rdata->id = i;
rdata->initdata = of_get_regulator_init_data(
iodev->dev, reg_np,
&regulators[i]);
rdata->reg_node = reg_np;
rdata++;
}
of_node_put(regulators_np);
return 0;
}
#else
static int s2mpb02_pmic_dt_parse_pdata(struct s2mpb02_dev *iodev,
struct s2mpb02_platform_data *pdata)
{
return 0;
}
#endif /* CONFIG_OF */
static int s2mpb02_pmic_probe(struct platform_device *pdev)
{
struct s2mpb02_dev *iodev = dev_get_drvdata(pdev->dev.parent);
struct s2mpb02_platform_data *pdata = iodev->pdata;
struct regulator_config config = { };
struct s2mpb02_data *s2mpb02;
struct i2c_client *i2c;
int i, ret;
dev_info(&pdev->dev, "%s\n", __func__);
if (!pdata) {
pr_info("[%s:%d] !pdata\n", __FILE__, __LINE__);
dev_err(pdev->dev.parent, "No platform init data supplied.\n");
return -ENODEV;
}
if (iodev->dev->of_node) {
ret = s2mpb02_pmic_dt_parse_pdata(iodev, pdata);
if (ret)
return ret;
}
s2mpb02 = devm_kzalloc(&pdev->dev, sizeof(struct s2mpb02_data),
GFP_KERNEL);
if (!s2mpb02) {
pr_info("[%s:%d] if (!s2mpb02)\n", __FILE__, __LINE__);
return -ENOMEM;
}
s2mpb02->iodev = iodev;
s2mpb02->num_regulators = pdata->num_regulators;
platform_set_drvdata(pdev, s2mpb02);
i2c = s2mpb02->iodev->i2c;
for (i = 0; i < pdata->num_regulators; i++) {
int id = pdata->regulators[i].id;
config.dev = &pdev->dev;
config.init_data = pdata->regulators[i].initdata;
config.driver_data = s2mpb02;
config.of_node = pdata->regulators[i].reg_node;
s2mpb02->opmode[id] = regulators[id].enable_mask;
s2mpb02->rdev[i] = regulator_register(&regulators[id], &config);
if (IS_ERR(s2mpb02->rdev[i])) {
ret = PTR_ERR(s2mpb02->rdev[i]);
dev_err(&pdev->dev, "regulator init failed for %d\n",
id);
s2mpb02->rdev[i] = NULL;
goto err;
}
}
dev_info(&pdev->dev, "%s ended\n", __func__);
return 0;
err:
pr_info("[%s:%d] err:\n", __FILE__, __LINE__);
for (i = 0; i < s2mpb02->num_regulators; i++)
if (s2mpb02->rdev[i])
regulator_unregister(s2mpb02->rdev[i]);
devm_kfree(&pdev->dev, (void*)s2mpb02);
return ret;
}
static int s2mpb02_pmic_remove(struct platform_device *pdev)
{
struct s2mpb02_data *s2mpb02 = platform_get_drvdata(pdev);
int i;
dev_info(&pdev->dev, "%s\n", __func__);
for (i = 0; i < s2mpb02->num_regulators; i++)
if (s2mpb02->rdev[i])
regulator_unregister(s2mpb02->rdev[i]);
return 0;
}
static const struct platform_device_id s2mpb02_pmic_id[] = {
{"s2mpb02-regulator", 0},
{},
};
MODULE_DEVICE_TABLE(platform, s2mpb02_pmic_id);
static struct platform_driver s2mpb02_pmic_driver = {
.driver = {
.name = "s2mpb02-regulator",
.owner = THIS_MODULE,
.suppress_bind_attrs = true,
},
.probe = s2mpb02_pmic_probe,
.remove = s2mpb02_pmic_remove,
.id_table = s2mpb02_pmic_id,
};
static int __init s2mpb02_pmic_init(void)
{
return platform_driver_register(&s2mpb02_pmic_driver);
}
subsys_initcall(s2mpb02_pmic_init);
static void __exit s2mpb02_pmic_cleanup(void)
{
platform_driver_unregister(&s2mpb02_pmic_driver);
}
module_exit(s2mpb02_pmic_cleanup);
MODULE_DESCRIPTION("SAMSUNG s2mpb02 Regulator Driver");
MODULE_LICENSE("GPL");