497 lines
12 KiB
C
Executable File
497 lines
12 KiB
C
Executable File
/*
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* s2mpb03.c - Regulator driver for the Samsung s2mpb03
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*
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* Copyright (C) 2016 Samsung Electronics
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/module.h>
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#include <linux/bug.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/s2mpb03.h>
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#include <linux/regulator/of_regulator.h>
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struct s2mpb03_data {
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struct s2mpb03_dev *iodev;
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int num_regulators;
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struct regulator_dev *rdev[S2MPB03_REGULATOR_MAX];
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int opmode[S2MPB03_REGULATOR_MAX];
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};
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int s2mpb03_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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struct s2mpb03_dev *s2mpb03 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mpb03->i2c_lock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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mutex_unlock(&s2mpb03->i2c_lock);
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if (ret < 0) {
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pr_info("%s:%s reg(0x%x), ret(%d)\n",
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MFD_DEV_NAME, __func__, reg, ret);
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return ret;
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}
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ret &= 0xff;
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*dest = ret;
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return 0;
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}
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int s2mpb03_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct s2mpb03_dev *s2mpb03 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mpb03->i2c_lock);
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ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
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mutex_unlock(&s2mpb03->i2c_lock);
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if (ret < 0)
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return ret;
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return 0;
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}
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int s2mpb03_read_word(struct i2c_client *i2c, u8 reg)
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{
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struct s2mpb03_dev *s2mpb03 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mpb03->i2c_lock);
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ret = i2c_smbus_read_word_data(i2c, reg);
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mutex_unlock(&s2mpb03->i2c_lock);
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if (ret < 0)
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return ret;
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return ret;
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}
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int s2mpb03_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
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{
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struct s2mpb03_dev *s2mpb03 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mpb03->i2c_lock);
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ret = i2c_smbus_write_byte_data(i2c, reg, value);
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mutex_unlock(&s2mpb03->i2c_lock);
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if (ret < 0)
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pr_info("%s:%s reg(0x%x), ret(%d)\n",
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MFD_DEV_NAME, __func__, reg, ret);
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return ret;
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}
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int s2mpb03_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct s2mpb03_dev *s2mpb03 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mpb03->i2c_lock);
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ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
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mutex_unlock(&s2mpb03->i2c_lock);
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if (ret < 0)
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return ret;
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return 0;
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}
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int s2mpb03_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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{
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struct s2mpb03_dev *s2mpb03 = i2c_get_clientdata(i2c);
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int ret;
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u8 old_val, new_val;
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mutex_lock(&s2mpb03->i2c_lock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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if (ret >= 0) {
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old_val = ret & 0xff;
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new_val = (val & mask) | (old_val & (~mask));
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ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
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}
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mutex_unlock(&s2mpb03->i2c_lock);
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return ret;
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}
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static int s2m_enable(struct regulator_dev *rdev)
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{
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struct s2mpb03_data *info = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = info->iodev->i2c;
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return s2mpb03_update_reg(i2c, rdev->desc->enable_reg,
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info->opmode[rdev_get_id(rdev)],
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rdev->desc->enable_mask);
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}
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static int s2m_disable_regmap(struct regulator_dev *rdev)
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{
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struct s2mpb03_data *info = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = info->iodev->i2c;
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u8 val;
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if (rdev->desc->enable_is_inverted)
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val = rdev->desc->enable_mask;
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else
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val = 0;
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return s2mpb03_update_reg(i2c, rdev->desc->enable_reg,
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val, rdev->desc->enable_mask);
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}
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static int s2m_is_enabled_regmap(struct regulator_dev *rdev)
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{
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struct s2mpb03_data *info = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = info->iodev->i2c;
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int ret;
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u8 val;
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ret = s2mpb03_read_reg(i2c, rdev->desc->enable_reg, &val);
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if (ret < 0)
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return ret;
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if (rdev->desc->enable_is_inverted)
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return (val & rdev->desc->enable_mask) == 0;
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else
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return (val & rdev->desc->enable_mask) != 0;
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}
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static int s2m_get_voltage_sel_regmap(struct regulator_dev *rdev)
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{
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struct s2mpb03_data *info = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = info->iodev->i2c;
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int ret;
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u8 val;
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ret = s2mpb03_read_reg(i2c, rdev->desc->vsel_reg, &val);
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if (ret < 0)
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return ret;
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val &= rdev->desc->vsel_mask;
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return val;
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}
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static int s2m_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned sel)
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{
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struct s2mpb03_data *info = rdev_get_drvdata(rdev);
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struct i2c_client *i2c = info->iodev->i2c;
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int ret;
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ret = s2mpb03_update_reg(i2c, rdev->desc->vsel_reg,
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sel, rdev->desc->vsel_mask);
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if (ret < 0)
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goto out;
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if (rdev->desc->apply_bit)
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ret = s2mpb03_update_reg(i2c, rdev->desc->apply_reg,
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rdev->desc->apply_bit,
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rdev->desc->apply_bit);
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return ret;
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out:
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pr_warn("%s: failed to set voltage_sel_regmap\n", rdev->desc->name);
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return ret;
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}
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static int s2m_set_voltage_time_sel(struct regulator_dev *rdev,
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unsigned int old_selector,
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unsigned int new_selector)
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{
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int old_volt, new_volt;
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/* sanity check */
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if (!rdev->desc->ops->list_voltage)
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return -EINVAL;
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old_volt = rdev->desc->ops->list_voltage(rdev, old_selector);
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new_volt = rdev->desc->ops->list_voltage(rdev, new_selector);
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if (old_selector < new_selector)
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return DIV_ROUND_UP(new_volt - old_volt, S2MPB03_RAMP_DELAY);
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return 0;
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}
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static struct regulator_ops s2mpb03_ldo_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.map_voltage = regulator_map_voltage_linear,
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.is_enabled = s2m_is_enabled_regmap,
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.enable = s2m_enable,
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.disable = s2m_disable_regmap,
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.get_voltage_sel = s2m_get_voltage_sel_regmap,
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.set_voltage_sel = s2m_set_voltage_sel_regmap,
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.set_voltage_time_sel = s2m_set_voltage_time_sel,
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};
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#define _LDO(macro) S2MPB03_LDO##macro
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#define _REG(ctrl) S2MPB03_REG##ctrl
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#define _ldo_ops(num) s2mpb03_ldo_ops##num
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#define _TIME(macro) S2MPB03_ENABLE_TIME##macro
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#define LDO_DESC(_name, _id, _ops, m, s, v, e, t) { \
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.name = _name, \
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.id = _id, \
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.ops = _ops, \
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.type = REGULATOR_VOLTAGE, \
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.owner = THIS_MODULE, \
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.min_uV = m, \
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.uV_step = s, \
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.n_voltages = S2MPB03_LDO_N_VOLTAGES, \
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.vsel_reg = v, \
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.vsel_mask = S2MPB03_LDO_VSEL_MASK, \
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.enable_reg = e, \
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.enable_mask = S2MPB03_LDO_ENABLE_MASK, \
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.enable_time = t \
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}
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static struct regulator_desc regulators[S2MPB03_REGULATOR_MAX] = {
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/* name, id, ops, min_uv, uV_step, vsel_reg, enable_reg */
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LDO_DESC("s2mpb03-ldo1", _LDO(1), &_ldo_ops(), _LDO(_MIN1),
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_LDO(_STEP2), _REG(_LDO1_CTRL),
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_REG(_LDO1_CTRL), _TIME(_LDO)),
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LDO_DESC("s2mpb03-ldo2", _LDO(2), &_ldo_ops(), _LDO(_MIN1),
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_LDO(_STEP2), _REG(_LDO2_CTRL),
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_REG(_LDO2_CTRL), _TIME(_LDO)),
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LDO_DESC("s2mpb03-ldo3", _LDO(3), &_ldo_ops(), _LDO(_MIN1),
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_LDO(_STEP1), _REG(_LDO3_CTRL),
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_REG(_LDO3_CTRL), _TIME(_LDO)),
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LDO_DESC("s2mpb03-ldo4", _LDO(4), &_ldo_ops(), _LDO(_MIN1),
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_LDO(_STEP2), _REG(_LDO4_CTRL),
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_REG(_LDO4_CTRL), _TIME(_LDO)),
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LDO_DESC("s2mpb03-ldo5", _LDO(5), &_ldo_ops(), _LDO(_MIN2),
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_LDO(_STEP1), _REG(_LDO5_CTRL),
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_REG(_LDO5_CTRL), _TIME(_LDO)),
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LDO_DESC("s2mpb03-ldo6", _LDO(6), &_ldo_ops(), _LDO(_MIN2),
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_LDO(_STEP1), _REG(_LDO6_CTRL),
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_REG(_LDO6_CTRL), _TIME(_LDO)),
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LDO_DESC("s2mpb03-ldo7", _LDO(7), &_ldo_ops(), _LDO(_MIN2),
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_LDO(_STEP1), _REG(_LDO7_CTRL),
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_REG(_LDO7_CTRL), _TIME(_LDO))
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};
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#ifdef CONFIG_OF
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static int s2mpb03_pmic_dt_parse_pdata(struct device *dev,
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struct s2mpb03_platform_data *pdata)
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{
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struct device_node *pmic_np, *regulators_np, *reg_np;
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struct s2mpb03_regulator_data *rdata;
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unsigned int i;
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pmic_np = dev->of_node;
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if (!pmic_np) {
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dev_err(dev, "could not find pmic sub-node\n");
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return -ENODEV;
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}
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pdata->wakeup = of_property_read_bool(pmic_np, "s2mpb03,wakeup");
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regulators_np = of_find_node_by_name(pmic_np, "regulators");
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if (!regulators_np) {
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dev_err(dev, "could not find regulators sub-node\n");
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return -EINVAL;
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}
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/* count the number of regulators to be supported in pmic */
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pdata->num_regulators = 0;
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for_each_child_of_node(regulators_np, reg_np) {
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pdata->num_regulators++;
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}
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rdata = devm_kzalloc(dev, sizeof(*rdata) *
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pdata->num_regulators, GFP_KERNEL);
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if (!rdata) {
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dev_err(dev,
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"could not allocate memory for regulator data\n");
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return -ENOMEM;
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}
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pdata->regulators = rdata;
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for_each_child_of_node(regulators_np, reg_np) {
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for (i = 0; i < ARRAY_SIZE(regulators); i++)
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if (!of_node_cmp(reg_np->name,
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regulators[i].name))
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break;
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if (i == ARRAY_SIZE(regulators)) {
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dev_warn(dev,
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"don't know how to configure regulator %s\n",
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reg_np->name);
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continue;
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}
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rdata->id = i;
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rdata->initdata = of_get_regulator_init_data(
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dev, reg_np,
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®ulators[i]);
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rdata->reg_node = reg_np;
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rdata++;
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}
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of_node_put(regulators_np);
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return 0;
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}
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#else
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static int s2mpb03_pmic_dt_parse_pdata(struct s2mpb03_dev *iodev,
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struct s2mpb03_platform_data *pdata)
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{
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return 0;
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}
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#endif /* CONFIG_OF */
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static int s2mpb03_pmic_probe(struct i2c_client *i2c,
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const struct i2c_device_id *dev_id)
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{
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struct s2mpb03_dev *iodev;
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struct s2mpb03_platform_data *pdata = i2c->dev.platform_data;
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struct regulator_config config = { };
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struct s2mpb03_data *s2mpb03;
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int i;
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int ret = 0;
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pr_info("%s:%s\n", MFD_DEV_NAME, __func__);
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iodev = devm_kzalloc(&i2c->dev, sizeof(struct s2mpb03_dev), GFP_KERNEL);
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if (!iodev) {
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dev_err(&i2c->dev, "%s: Failed to alloc mem for s2mpb03\n",
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__func__);
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return -ENOMEM;
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}
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if (i2c->dev.of_node) {
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pdata = devm_kzalloc(&i2c->dev,
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sizeof(struct s2mpb03_platform_data), GFP_KERNEL);
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if (!pdata) {
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dev_err(&i2c->dev, "Failed to allocate memory\n");
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ret = -ENOMEM;
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goto err_pdata;
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}
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ret = s2mpb03_pmic_dt_parse_pdata(&i2c->dev, pdata);
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if (ret < 0) {
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dev_err(&i2c->dev, "Failed to get device of_node\n");
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goto err_pdata;
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}
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i2c->dev.platform_data = pdata;
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} else
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pdata = i2c->dev.platform_data;
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iodev->dev = &i2c->dev;
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iodev->i2c = i2c;
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if (pdata) {
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iodev->pdata = pdata;
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iodev->wakeup = pdata->wakeup;
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} else {
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ret = -EINVAL;
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goto err_pdata;
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}
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mutex_init(&iodev->i2c_lock);
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i2c_set_clientdata(i2c, iodev);
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s2mpb03 = devm_kzalloc(&i2c->dev, sizeof(struct s2mpb03_data),
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GFP_KERNEL);
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if (!s2mpb03) {
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pr_info("[%s:%d] if (!s2mpb03)\n", __FILE__, __LINE__);
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ret = -ENOMEM;
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goto err_s2mpb03_data;
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}
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s2mpb03->iodev = iodev;
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s2mpb03->num_regulators = pdata->num_regulators;
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for (i = 0; i < pdata->num_regulators; i++) {
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int id = pdata->regulators[i].id;
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config.dev = &i2c->dev;
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config.init_data = pdata->regulators[i].initdata;
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config.driver_data = s2mpb03;
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config.of_node = pdata->regulators[i].reg_node;
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s2mpb03->opmode[id] = regulators[id].enable_mask;
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s2mpb03->rdev[i] = devm_regulator_register(&i2c->dev, ®ulators[id], &config);
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if (IS_ERR(s2mpb03->rdev[i])) {
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ret = PTR_ERR(s2mpb03->rdev[i]);
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dev_err(&i2c->dev, "regulator init failed for %d\n",
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id);
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s2mpb03->rdev[i] = NULL;
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goto err_s2mpb03_data;
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}
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}
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return ret;
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err_s2mpb03_data:
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mutex_destroy(&iodev->i2c_lock);
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err_pdata:
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pr_info("[%s:%d] err\n", __func__, __LINE__);
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return ret;
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}
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#if defined(CONFIG_OF)
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static struct of_device_id s2mpb03_i2c_dt_ids[] = {
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{ .compatible = "samsung,s2mpb03pmic" },
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{ },
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};
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#endif /* CONFIG_OF */
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static int s2mpb03_pmic_remove(struct i2c_client *i2c)
|
|
{
|
|
dev_info(&i2c->dev, "%s\n", __func__);
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_OF)
|
|
static const struct i2c_device_id s2mpb03_pmic_id[] = {
|
|
{"s2mpb03-regulator", 0},
|
|
{},
|
|
};
|
|
#endif
|
|
|
|
static struct i2c_driver s2mpb03_i2c_driver = {
|
|
.driver = {
|
|
.name = "s2mpb03-regulator",
|
|
.owner = THIS_MODULE,
|
|
#if defined(CONFIG_OF)
|
|
.of_match_table = s2mpb03_i2c_dt_ids,
|
|
#endif /* CONFIG_OF */
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.probe = s2mpb03_pmic_probe,
|
|
.remove = s2mpb03_pmic_remove,
|
|
.id_table = s2mpb03_pmic_id,
|
|
};
|
|
|
|
static int __init s2mpb03_i2c_init(void)
|
|
{
|
|
pr_info("%s:%s\n", MFD_DEV_NAME, __func__);
|
|
return i2c_add_driver(&s2mpb03_i2c_driver);
|
|
}
|
|
subsys_initcall(s2mpb03_i2c_init);
|
|
|
|
static void __exit s2mpb03_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&s2mpb03_i2c_driver);
|
|
}
|
|
module_exit(s2mpb03_i2c_exit);
|
|
|
|
MODULE_DESCRIPTION("SAMSUNG s2mpb03 Regulator Driver");
|
|
MODULE_LICENSE("GPL");
|