linux/drivers/regulator/aat2870-regulator.c
Thomas Gleixner 2b27bdcc20 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 336
Based on 1 normalized pattern(s):

  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 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 51 franklin st fifth floor boston ma 02110
  1301 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 246 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190530000436.674189849@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:07 +02:00

201 lines
4.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/drivers/regulator/aat2870-regulator.c
*
* Copyright (c) 2011, NVIDIA Corporation.
* Author: Jin Park <jinyoungp@nvidia.com>
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/aat2870.h>
struct aat2870_regulator {
struct aat2870_data *aat2870;
struct regulator_desc desc;
u8 enable_addr;
u8 enable_shift;
u8 enable_mask;
u8 voltage_addr;
u8 voltage_shift;
u8 voltage_mask;
};
static int aat2870_ldo_set_voltage_sel(struct regulator_dev *rdev,
unsigned selector)
{
struct aat2870_regulator *ri = rdev_get_drvdata(rdev);
struct aat2870_data *aat2870 = ri->aat2870;
return aat2870->update(aat2870, ri->voltage_addr, ri->voltage_mask,
selector << ri->voltage_shift);
}
static int aat2870_ldo_get_voltage_sel(struct regulator_dev *rdev)
{
struct aat2870_regulator *ri = rdev_get_drvdata(rdev);
struct aat2870_data *aat2870 = ri->aat2870;
u8 val;
int ret;
ret = aat2870->read(aat2870, ri->voltage_addr, &val);
if (ret)
return ret;
return (val & ri->voltage_mask) >> ri->voltage_shift;
}
static int aat2870_ldo_enable(struct regulator_dev *rdev)
{
struct aat2870_regulator *ri = rdev_get_drvdata(rdev);
struct aat2870_data *aat2870 = ri->aat2870;
return aat2870->update(aat2870, ri->enable_addr, ri->enable_mask,
ri->enable_mask);
}
static int aat2870_ldo_disable(struct regulator_dev *rdev)
{
struct aat2870_regulator *ri = rdev_get_drvdata(rdev);
struct aat2870_data *aat2870 = ri->aat2870;
return aat2870->update(aat2870, ri->enable_addr, ri->enable_mask, 0);
}
static int aat2870_ldo_is_enabled(struct regulator_dev *rdev)
{
struct aat2870_regulator *ri = rdev_get_drvdata(rdev);
struct aat2870_data *aat2870 = ri->aat2870;
u8 val;
int ret;
ret = aat2870->read(aat2870, ri->enable_addr, &val);
if (ret)
return ret;
return val & ri->enable_mask ? 1 : 0;
}
static const struct regulator_ops aat2870_ldo_ops = {
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.set_voltage_sel = aat2870_ldo_set_voltage_sel,
.get_voltage_sel = aat2870_ldo_get_voltage_sel,
.enable = aat2870_ldo_enable,
.disable = aat2870_ldo_disable,
.is_enabled = aat2870_ldo_is_enabled,
};
static const unsigned int aat2870_ldo_voltages[] = {
1200000, 1300000, 1500000, 1600000,
1800000, 2000000, 2200000, 2500000,
2600000, 2700000, 2800000, 2900000,
3000000, 3100000, 3200000, 3300000,
};
#define AAT2870_LDO(ids) \
{ \
.desc = { \
.name = #ids, \
.id = AAT2870_ID_##ids, \
.n_voltages = ARRAY_SIZE(aat2870_ldo_voltages), \
.volt_table = aat2870_ldo_voltages, \
.ops = &aat2870_ldo_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
}, \
}
static struct aat2870_regulator aat2870_regulators[] = {
AAT2870_LDO(LDOA),
AAT2870_LDO(LDOB),
AAT2870_LDO(LDOC),
AAT2870_LDO(LDOD),
};
static struct aat2870_regulator *aat2870_get_regulator(int id)
{
struct aat2870_regulator *ri = NULL;
int i;
for (i = 0; i < ARRAY_SIZE(aat2870_regulators); i++) {
ri = &aat2870_regulators[i];
if (ri->desc.id == id)
break;
}
if (i == ARRAY_SIZE(aat2870_regulators))
return NULL;
ri->enable_addr = AAT2870_LDO_EN;
ri->enable_shift = id - AAT2870_ID_LDOA;
ri->enable_mask = 0x1 << ri->enable_shift;
ri->voltage_addr = (id - AAT2870_ID_LDOA) / 2 ?
AAT2870_LDO_CD : AAT2870_LDO_AB;
ri->voltage_shift = (id - AAT2870_ID_LDOA) % 2 ? 0 : 4;
ri->voltage_mask = 0xF << ri->voltage_shift;
return ri;
}
static int aat2870_regulator_probe(struct platform_device *pdev)
{
struct aat2870_regulator *ri;
struct regulator_config config = { };
struct regulator_dev *rdev;
ri = aat2870_get_regulator(pdev->id);
if (!ri) {
dev_err(&pdev->dev, "Invalid device ID, %d\n", pdev->id);
return -EINVAL;
}
ri->aat2870 = dev_get_drvdata(pdev->dev.parent);
config.dev = &pdev->dev;
config.driver_data = ri;
config.init_data = dev_get_platdata(&pdev->dev);
rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
if (IS_ERR(rdev)) {
dev_err(&pdev->dev, "Failed to register regulator %s\n",
ri->desc.name);
return PTR_ERR(rdev);
}
platform_set_drvdata(pdev, rdev);
return 0;
}
static struct platform_driver aat2870_regulator_driver = {
.driver = {
.name = "aat2870-regulator",
},
.probe = aat2870_regulator_probe,
};
static int __init aat2870_regulator_init(void)
{
return platform_driver_register(&aat2870_regulator_driver);
}
subsys_initcall(aat2870_regulator_init);
static void __exit aat2870_regulator_exit(void)
{
platform_driver_unregister(&aat2870_regulator_driver);
}
module_exit(aat2870_regulator_exit);
MODULE_DESCRIPTION("AnalogicTech AAT2870 Regulator");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jin Park <jinyoungp@nvidia.com>");
MODULE_ALIAS("platform:aat2870-regulator");