8dc995f56e
CONFIG_HOTPLUG is going away as an option so __devexit is no longer needed. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
236 lines
7.0 KiB
C
236 lines
7.0 KiB
C
/*
|
|
* 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
|
|
*
|
|
*
|
|
* 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/licenses/>.
|
|
*
|
|
*/
|
|
|
|
#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;
|
|
};
|
|
|
|
struct rc5t583_regulator {
|
|
struct rc5t583_regulator_info *reg_info;
|
|
|
|
/* Devices */
|
|
struct device *dev;
|
|
struct rc5t583 *mfd;
|
|
struct regulator_dev *rdev;
|
|
};
|
|
|
|
static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
|
|
{
|
|
struct rc5t583_regulator *reg = 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->reg_info->enable_uv_per_us);
|
|
}
|
|
|
|
static 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_init_data *reg_data;
|
|
struct regulator_config config = { };
|
|
struct rc5t583_regulator *reg = NULL;
|
|
struct rc5t583_regulator *regs;
|
|
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;
|
|
}
|
|
|
|
regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX *
|
|
sizeof(struct rc5t583_regulator), GFP_KERNEL);
|
|
if (!regs) {
|
|
dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
|
|
for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
|
|
reg_data = pdata->reg_init_data[id];
|
|
|
|
/* No need to register if there is no regulator data */
|
|
if (!reg_data)
|
|
continue;
|
|
|
|
reg = ®s[id];
|
|
ri = &rc5t583_reg_info[id];
|
|
reg->reg_info = ri;
|
|
reg->mfd = rc5t583;
|
|
reg->dev = &pdev->dev;
|
|
|
|
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 = reg_data;
|
|
config.driver_data = reg;
|
|
config.regmap = rc5t583->regmap;
|
|
|
|
rdev = regulator_register(&ri->desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "Failed to register regulator %s\n",
|
|
ri->desc.name);
|
|
ret = PTR_ERR(rdev);
|
|
goto clean_exit;
|
|
}
|
|
reg->rdev = rdev;
|
|
}
|
|
platform_set_drvdata(pdev, regs);
|
|
return 0;
|
|
|
|
clean_exit:
|
|
while (--id >= 0)
|
|
regulator_unregister(regs[id].rdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int rc5t583_regulator_remove(struct platform_device *pdev)
|
|
{
|
|
struct rc5t583_regulator *regs = platform_get_drvdata(pdev);
|
|
int id;
|
|
|
|
for (id = 0; id < RC5T583_REGULATOR_MAX; ++id)
|
|
regulator_unregister(regs[id].rdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver rc5t583_regulator_driver = {
|
|
.driver = {
|
|
.name = "rc5t583-regulator",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = rc5t583_regulator_probe,
|
|
.remove = rc5t583_regulator_remove,
|
|
};
|
|
|
|
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");
|