linux/drivers/regulator/rc5t583-regulator.c
Thomas Gleixner 9952f6918d treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 201
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope 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 see http www gnu org
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extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 228 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Steve Winslow <swinslow@gmail.com>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190528171438.107155473@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:29:52 -07:00

172 lines
5.4 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Regulator driver for RICOH RC5T583 power management chip.
*
* Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
* Author: Laxman dewangan <ldewangan@nvidia.com>
*
* based on code
* Copyright (C) 2011 RICOH COMPANY,LTD
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/gpio.h>
#include <linux/mfd/rc5t583.h>
struct rc5t583_regulator_info {
int deepsleep_id;
/* Regulator register address.*/
uint8_t reg_disc_reg;
uint8_t disc_bit;
uint8_t deepsleep_reg;
/* Regulator specific turn-on delay and voltage settling time*/
int enable_uv_per_us;
/* Used by regulator core */
struct regulator_desc desc;
};
static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
{
struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev);
int vsel = regulator_get_voltage_sel_regmap(rdev);
int curr_uV = regulator_list_voltage_linear(rdev, vsel);
return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us);
}
static const struct regulator_ops rc5t583_ops = {
.is_enabled = regulator_is_enabled_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.enable_time = rc5t583_regulator_enable_time,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
};
#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
_vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
{ \
.reg_disc_reg = RC5T583_REG_##_disc_reg, \
.disc_bit = _disc_bit, \
.deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \
.enable_uv_per_us = _enable_mv * 1000, \
.deepsleep_id = RC5T583_DS_##_id, \
.desc = { \
.name = "rc5t583-regulator-"#_id, \
.id = RC5T583_REGULATOR_##_id, \
.n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
.ops = &rc5t583_ops, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.vsel_reg = RC5T583_REG_##_id##DAC, \
.vsel_mask = _vout_mask, \
.enable_reg = RC5T583_REG_##_en_reg, \
.enable_mask = BIT(_en_bit), \
.min_uV = _min_mv * 1000, \
.uV_step = _step_uV, \
.ramp_delay = 40 * 1000, \
}, \
}
static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
};
static int rc5t583_regulator_probe(struct platform_device *pdev)
{
struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
struct regulator_config config = { };
struct regulator_dev *rdev;
struct rc5t583_regulator_info *ri;
int ret;
int id;
if (!pdata) {
dev_err(&pdev->dev, "No platform data, exiting...\n");
return -ENODEV;
}
for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
ri = &rc5t583_reg_info[id];
if (ri->deepsleep_id == RC5T583_DS_NONE)
goto skip_ext_pwr_config;
ret = rc5t583_ext_power_req_config(rc5t583->dev,
ri->deepsleep_id,
pdata->regulator_ext_pwr_control[id],
pdata->regulator_deepsleep_slot[id]);
/*
* Configuring external control is not a major issue,
* just give warning.
*/
if (ret < 0)
dev_warn(&pdev->dev,
"Failed to configure ext control %d\n", id);
skip_ext_pwr_config:
config.dev = &pdev->dev;
config.init_data = pdata->reg_init_data[id];
config.driver_data = ri;
config.regmap = rc5t583->regmap;
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);
}
}
return 0;
}
static struct platform_driver rc5t583_regulator_driver = {
.driver = {
.name = "rc5t583-regulator",
},
.probe = rc5t583_regulator_probe,
};
static int __init rc5t583_regulator_init(void)
{
return platform_driver_register(&rc5t583_regulator_driver);
}
subsys_initcall(rc5t583_regulator_init);
static void __exit rc5t583_regulator_exit(void)
{
platform_driver_unregister(&rc5t583_regulator_driver);
}
module_exit(rc5t583_regulator_exit);
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_DESCRIPTION("RC5T583 regulator driver");
MODULE_ALIAS("platform:rc5t583-regulator");
MODULE_LICENSE("GPL v2");