484 lines
12 KiB
C
484 lines
12 KiB
C
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/*
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* s2mps24.c - mfd core driver for the s2mps24
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*
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* Copyright (C) 2020 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/slab.h>
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#include <linux/i2c.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/mutex.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/samsung/s2mps24.h>
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#include <linux/mfd/samsung/s2mps24-regulator.h>
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#include <linux/regulator/machine.h>
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#include <linux/rtc.h>
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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#include <soc/samsung/acpm_mfd.h>
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#define SLAVE_CHANNEL 1
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#endif
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#if IS_ENABLED(CONFIG_OF)
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#endif /* CONFIG_OF */
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#define I2C_ADDR_TOP 0x00
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#define I2C_ADDR_PMIC 0x01
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#define I2C_ADDR_DEBUG 0x0F
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#define I2C_ADDR_ADC 0x0A
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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static struct device_node *acpm_mfd_node;
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#endif
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static struct mfd_cell s2mps24_devs[] = {
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{ .name = "s2mps24-regulator", },
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};
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int s2mps24_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = exynos_acpm_read_reg(acpm_mfd_node, SLAVE_CHANNEL, i2c->addr, reg, dest);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return 0;
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}
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EXPORT_SYMBOL_GPL(s2mps24_read_reg);
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int s2mps24_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = exynos_acpm_bulk_read(acpm_mfd_node, SLAVE_CHANNEL, i2c->addr, reg, count, buf);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return 0;
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}
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EXPORT_SYMBOL_GPL(s2mps24_bulk_read);
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int s2mps24_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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mutex_lock(&s2mps24->i2c_lock);
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ret = exynos_acpm_write_reg(acpm_mfd_node, SLAVE_CHANNEL, i2c->addr, reg, value);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps24_write_reg);
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int s2mps24_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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mutex_lock(&s2mps24->i2c_lock);
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ret = exynos_acpm_bulk_write(acpm_mfd_node, SLAVE_CHANNEL, i2c->addr, reg, count, buf);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps24_bulk_write);
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int s2mps24_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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{
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int ret = 0;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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mutex_lock(&s2mps24->i2c_lock);
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ret = exynos_acpm_update_reg(acpm_mfd_node, SLAVE_CHANNEL, i2c->addr, reg, val, mask);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret) {
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pr_err("[%s] acpm ipc fail!\n", __func__);
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return ret;
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}
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#endif
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps24_update_reg);
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#if 0
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int s2mps24_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret < 0) {
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pr_info("%s:%s reg(0x%hhx), 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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EXPORT_SYMBOL_GPL(s2mps24_read_reg);
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int s2mps24_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
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mutex_unlock(&s2mps24->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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EXPORT_SYMBOL_GPL(s2mps24_bulk_read);
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int s2mps24_read_word(struct i2c_client *i2c, u8 reg)
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{
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = i2c_smbus_read_word_data(i2c, reg);
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mutex_unlock(&s2mps24->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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EXPORT_SYMBOL_GPL(s2mps24_read_word);
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int s2mps24_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
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{
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = i2c_smbus_write_byte_data(i2c, reg, value);
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mutex_unlock(&s2mps24->i2c_lock);
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if (ret < 0)
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pr_info("%s:%s reg(0x%hhx), 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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EXPORT_SYMBOL_GPL(s2mps24_write_reg);
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int s2mps24_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
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mutex_unlock(&s2mps24->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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EXPORT_SYMBOL_GPL(s2mps24_bulk_write);
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int s2mps24_write_word(struct i2c_client *i2c, u8 reg, u16 value)
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{
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struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&s2mps24->i2c_lock);
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ret = i2c_smbus_write_word_data(i2c, reg, value);
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mutex_unlock(&s2mps24->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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EXPORT_SYMBOL_GPL(s2mps24_write_word);
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int s2mps24_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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{
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struct s2mps24_dev *s2mps24 = 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(&s2mps24->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(&s2mps24->i2c_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mps24_update_reg);
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#endif
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#if IS_ENABLED(CONFIG_OF)
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static int of_s2mps24_dt(struct device *dev,
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struct s2mps24_platform_data *pdata,
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struct s2mps24_dev *s2mps24)
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{
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struct device_node *np = dev->of_node;
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int strlen;
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const char *status;
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if (!np)
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return -EINVAL;
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#if IS_ENABLED(CONFIG_EXYNOS_ACPM)
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acpm_mfd_node = np;
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#endif
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status = of_get_property(np, "s2mps24,wakeup", &strlen);
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if (status == NULL)
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return -EINVAL;
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if (strlen > 0) {
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if (!strcmp(status, "enabled") || !strcmp(status, "okay"))
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pdata->wakeup = true;
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else
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pdata->wakeup = false;
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}
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return 0;
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}
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#else
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static int of_s2mps24_dt(struct device *dev,
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struct s2mps24_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 struct i2c_client *pmic_i2c_new_dummy(struct i2c_adapter *adapter, u16 address)
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{
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struct i2c_client *ret;
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ret = i2c_new_dummy_device(adapter, address);
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return IS_ERR(ret) ? NULL : ret;
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}
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static int s2mps24_i2c_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 s2mps24_dev *s2mps24;
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struct s2mps24_platform_data *pdata = i2c->dev.platform_data;
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u8 reg_data;
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int ret = 0;
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pr_info("%s:%s start\n", MFD_DEV_NAME, __func__);
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s2mps24 = devm_kzalloc(&i2c->dev, sizeof(struct s2mps24_dev), GFP_KERNEL);
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if (!s2mps24) {
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dev_err(&i2c->dev, "%s: Failed to alloc mem for s2mps24\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 s2mps24_platform_data),
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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;
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}
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ret = of_s2mps24_dt(&i2c->dev, pdata, s2mps24);
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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;
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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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s2mps24->dev = &i2c->dev;
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i2c->addr = I2C_ADDR_TOP; /* forced COMMON address For GKI-R */
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s2mps24->i2c = i2c;
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|
|
s2mps24->device_type = S2MPS24X;
|
||
|
|
|
||
|
|
if (pdata) {
|
||
|
|
s2mps24->pdata = pdata;
|
||
|
|
s2mps24->wakeup = pdata->wakeup;
|
||
|
|
} else {
|
||
|
|
ret = -EINVAL;
|
||
|
|
goto err;
|
||
|
|
}
|
||
|
|
mutex_init(&s2mps24->i2c_lock);
|
||
|
|
|
||
|
|
i2c_set_clientdata(i2c, s2mps24);
|
||
|
|
|
||
|
|
ret = s2mps24_read_reg(i2c, S2MPS24_PMIC_REG_PMICID, ®_data);
|
||
|
|
if (ret < 0) {
|
||
|
|
dev_err(s2mps24->dev,
|
||
|
|
"device not found on this channel (this is not an error)\n");
|
||
|
|
ret = -ENODEV;
|
||
|
|
goto err_w_lock;
|
||
|
|
} else {
|
||
|
|
/* print rev */
|
||
|
|
s2mps24->pmic_rev = reg_data & CHIP_ID_HW_MASK;
|
||
|
|
}
|
||
|
|
|
||
|
|
s2mps24->pmic = pmic_i2c_new_dummy(i2c->adapter, I2C_ADDR_PMIC);
|
||
|
|
s2mps24->debug_i2c = pmic_i2c_new_dummy(i2c->adapter, I2C_ADDR_DEBUG);
|
||
|
|
s2mps24->adc_i2c = pmic_i2c_new_dummy(i2c->adapter, I2C_ADDR_ADC);
|
||
|
|
|
||
|
|
i2c_set_clientdata(s2mps24->pmic, s2mps24);
|
||
|
|
i2c_set_clientdata(s2mps24->debug_i2c, s2mps24);
|
||
|
|
i2c_set_clientdata(s2mps24->adc_i2c, s2mps24);
|
||
|
|
|
||
|
|
pr_info("%s device found: rev.0x%02hhx\n", __func__, s2mps24->pmic_rev);
|
||
|
|
|
||
|
|
/* init slave PMIC notifier */
|
||
|
|
ret = s2mps24_notifier_init(s2mps24);
|
||
|
|
if (ret < 0)
|
||
|
|
pr_err("%s: s2mps24_notifier_init fail\n", __func__);
|
||
|
|
|
||
|
|
ret = mfd_add_devices(s2mps24->dev, -1, s2mps24_devs,
|
||
|
|
ARRAY_SIZE(s2mps24_devs), NULL, 0, NULL);
|
||
|
|
if (ret < 0)
|
||
|
|
goto err_mfd;
|
||
|
|
|
||
|
|
ret = device_init_wakeup(s2mps24->dev, pdata->wakeup);
|
||
|
|
if (ret < 0) {
|
||
|
|
pr_err("%s: device_init_wakeup fail(%d)\n", __func__, ret);
|
||
|
|
goto err_mfd;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
|
||
|
|
err_mfd:
|
||
|
|
mfd_remove_devices(s2mps24->dev);
|
||
|
|
err_w_lock:
|
||
|
|
mutex_destroy(&s2mps24->i2c_lock);
|
||
|
|
err:
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int s2mps24_i2c_remove(struct i2c_client *i2c)
|
||
|
|
{
|
||
|
|
struct s2mps24_dev *s2mps24 = i2c_get_clientdata(i2c);
|
||
|
|
|
||
|
|
if(s2mps24->pdata->wakeup)
|
||
|
|
device_init_wakeup(s2mps24->dev, false);
|
||
|
|
s2mps24_notifier_deinit(s2mps24);
|
||
|
|
mfd_remove_devices(s2mps24->dev);
|
||
|
|
i2c_unregister_device(s2mps24->i2c);
|
||
|
|
mutex_destroy(&s2mps24->i2c_lock);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct i2c_device_id s2mps24_i2c_id[] = {
|
||
|
|
{ MFD_DEV_NAME, TYPE_S2MPS24 },
|
||
|
|
{ }
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(i2c, s2mps24_i2c_id);
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_OF)
|
||
|
|
static struct of_device_id s2mps24_i2c_dt_ids[] = {
|
||
|
|
{ .compatible = "samsung,s2mps24mfd" },
|
||
|
|
{ },
|
||
|
|
};
|
||
|
|
#endif /* CONFIG_OF */
|
||
|
|
|
||
|
|
#if IS_ENABLED(CONFIG_PM)
|
||
|
|
static int s2mps24_suspend(struct device *dev)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int s2mps24_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
#define s2mps24_suspend NULL
|
||
|
|
#define s2mps24_resume NULL
|
||
|
|
#endif /* CONFIG_PM */
|
||
|
|
|
||
|
|
static const struct dev_pm_ops s2mps24_pm = {
|
||
|
|
.suspend_late = s2mps24_suspend,
|
||
|
|
.resume_early = s2mps24_resume,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct i2c_driver s2mps24_i2c_driver = {
|
||
|
|
.driver = {
|
||
|
|
.name = MFD_DEV_NAME,
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
#if IS_ENABLED(CONFIG_PM)
|
||
|
|
.pm = &s2mps24_pm,
|
||
|
|
#endif /* CONFIG_PM */
|
||
|
|
#if IS_ENABLED(CONFIG_OF)
|
||
|
|
.of_match_table = s2mps24_i2c_dt_ids,
|
||
|
|
#endif /* CONFIG_OF */
|
||
|
|
.suppress_bind_attrs = true,
|
||
|
|
},
|
||
|
|
.probe = s2mps24_i2c_probe,
|
||
|
|
.remove = s2mps24_i2c_remove,
|
||
|
|
.id_table = s2mps24_i2c_id,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init s2mps24_i2c_init(void)
|
||
|
|
{
|
||
|
|
pr_info("%s:%s\n", MFD_DEV_NAME, __func__);
|
||
|
|
return i2c_add_driver(&s2mps24_i2c_driver);
|
||
|
|
}
|
||
|
|
/* init early so consumer devices can complete system boot */
|
||
|
|
subsys_initcall(s2mps24_i2c_init);
|
||
|
|
|
||
|
|
static void __exit s2mps24_i2c_exit(void)
|
||
|
|
{
|
||
|
|
i2c_del_driver(&s2mps24_i2c_driver);
|
||
|
|
}
|
||
|
|
module_exit(s2mps24_i2c_exit);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("s2mps24 multi-function core driver");
|
||
|
|
MODULE_AUTHOR("Samsung Electronics");
|
||
|
|
MODULE_LICENSE("GPL");
|