444 lines
11 KiB
C
Executable File
444 lines
11 KiB
C
Executable File
/*
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* s2mu106.c - mfd core driver for the s2mu106
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*
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* Copyright (C) 2020 Samsung Electronics
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*
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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/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/s2mu106.h>
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#include <linux/of_gpio.h>
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#define I2C_RETRY_CNT 3
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static struct mfd_cell s2mu106_devs[] = {
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#if defined(CONFIG_PM_S2MU106)
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{ .name = "s2mu106-powermeter", },
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#endif
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#if defined(CONFIG_CHARGER_S2MU106)
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{ .name = "s2mu106-charger", },
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#endif
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#if defined(CONFIG_LEDS_S2MU106_FLASH)
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{ .name = "leds-s2mu106", },
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#endif
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#if defined(CONFIG_LEDS_S2MU106_RGB)
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{ .name = "leds-s2mu106-rgb", },
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#endif
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#if defined(CONFIG_MUIC_S2MU106)
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{ .name = "s2mu106-muic", },
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#endif
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#if defined(CONFIG_HV_MUIC_S2MU106_AFC)
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{ .name = "s2mu106-afc", },
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#endif
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#if defined(CONFIG_MST_S2MU106)
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{ .name = "s2mu106-mst", },
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#endif
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#if defined(CONFIG_VIBRATOR_S2MU106)
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{ .name = "s2mu106-haptic", },
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#endif
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#if defined(CONFIG_REGULATOR_S2MU106)
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{ .name = "s2mu106-regulator", },
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#endif
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};
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int s2mu106_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_read_byte_data(i2c, reg);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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mutex_unlock(&s2mu106->i2c_lock);
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if (ret < 0) {
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pr_err("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME,
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__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(s2mu106_read_reg);
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int s2mu106_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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mutex_unlock(&s2mu106->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(s2mu106_bulk_read);
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int s2mu106_read_word(struct i2c_client *i2c, u8 reg)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_read_word_data(i2c, reg);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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mutex_unlock(&s2mu106->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(s2mu106_read_word);
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int s2mu106_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_write_byte_data(i2c, reg, value);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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mutex_unlock(&s2mu106->i2c_lock);
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if (ret < 0)
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pr_err("%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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EXPORT_SYMBOL_GPL(s2mu106_write_reg);
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int s2mu106_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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mutex_unlock(&s2mu106->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(s2mu106_bulk_write);
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int s2mu106_write_word(struct i2c_client *i2c, u8 reg, u16 value)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_write_word_data(i2c, reg, value);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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mutex_unlock(&s2mu106->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(s2mu106_write_word);
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int s2mu106_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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int ret, i;
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u8 old_val, new_val;
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mutex_lock(&s2mu106->i2c_lock);
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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_read_byte_data(i2c, reg);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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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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for (i = 0; i < I2C_RETRY_CNT; i++) {
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ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
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if (ret >= 0)
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break;
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pr_info("%s:%s reg(0x%x), ret(%d)\n", MFD_DEV_NAME, __func__, reg, ret);
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}
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}
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mutex_unlock(&s2mu106->i2c_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(s2mu106_update_reg);
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#if defined(CONFIG_OF)
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static int of_s2mu106_dt(struct device *dev,
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struct s2mu106_platform_data *pdata)
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{
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struct device_node *np_s2mu106 = dev->of_node;
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int ret = 0;
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if (!np_s2mu106)
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return -EINVAL;
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ret = of_get_named_gpio(np_s2mu106, "s2mu106,irq-gpio", 0);
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if (ret < 0)
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return ret;
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else
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pdata->irq_gpio = ret;
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pdata->wakeup = of_property_read_bool(np_s2mu106, "s2mu106,wakeup");
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pr_debug("%s: irq-gpio: %u\n", __func__, pdata->irq_gpio);
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return 0;
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}
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#else
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static int of_s2mu106_dt(struct device *dev,
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struct max77834_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 s2mu106_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 s2mu106_dev *s2mu106;
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struct s2mu106_platform_data *pdata = i2c->dev.platform_data;
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int ret = 0;
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u8 temp = 0;
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pr_info("%s start\n", __func__);
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s2mu106 = devm_kzalloc(&i2c->dev, sizeof(struct s2mu106_dev), GFP_KERNEL);
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if (!s2mu106) {
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dev_err(&i2c->dev, "%s: Failed to alloc mem for s2mu106\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 s2mu106_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;
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}
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ret = of_s2mu106_dt(&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;
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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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s2mu106->dev = &i2c->dev;
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s2mu106->i2c = i2c;
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s2mu106->irq = i2c->irq;
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if (pdata) {
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s2mu106->pdata = pdata;
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pdata->irq_base = irq_alloc_descs(-1, 0, S2MU106_IRQ_NR, -1);
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if (pdata->irq_base < 0) {
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pr_err("%s:%s irq_alloc_descs Fail! ret(%d)\n",
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MFD_DEV_NAME, __func__, pdata->irq_base);
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ret = -EINVAL;
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goto err;
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} else
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s2mu106->irq_base = pdata->irq_base;
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s2mu106->irq_gpio = pdata->irq_gpio;
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s2mu106->wakeup = pdata->wakeup;
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} else {
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ret = -EINVAL;
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goto err;
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}
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mutex_init(&s2mu106->i2c_lock);
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i2c_set_clientdata(i2c, s2mu106);
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s2mu106_read_reg(s2mu106->i2c, S2MU106_REG_PMICID, &temp);
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if (temp < 0)
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pr_err("[s2mu106 mfd] %s : i2c read error\n", __func__);
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s2mu106->pmic_ver = temp & S2MU106_REG_PMICID_MASK;
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pr_err("%s : ver=0x%x\n", __func__, s2mu106->pmic_ver);
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/* I2C enable for MUIC, AFC, MST, Powermeter */
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s2mu106->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_7C_SLAVE);
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i2c_set_clientdata(s2mu106->muic, s2mu106);
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/* I2C enable for Haptic, Haptic Boost */
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s2mu106->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
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i2c_set_clientdata(s2mu106->haptic, s2mu106);
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ret = s2mu106_irq_init(s2mu106);
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if (ret < 0)
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goto err_irq_init;
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ret = mfd_add_devices(s2mu106->dev, -1, s2mu106_devs,
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ARRAY_SIZE(s2mu106_devs), NULL, 0, NULL);
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if (ret < 0)
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goto err_mfd;
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device_init_wakeup(s2mu106->dev, pdata->wakeup);
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return ret;
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err_mfd:
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mutex_destroy(&s2mu106->i2c_lock);
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mfd_remove_devices(s2mu106->dev);
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err_irq_init:
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i2c_unregister_device(s2mu106->i2c);
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err:
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kfree(s2mu106);
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i2c_set_clientdata(i2c, NULL);
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return ret;
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}
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static int s2mu106_i2c_remove(struct i2c_client *i2c)
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{
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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mfd_remove_devices(s2mu106->dev);
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i2c_unregister_device(s2mu106->i2c);
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i2c_set_clientdata(i2c, NULL);
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return 0;
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}
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static const struct i2c_device_id s2mu106_i2c_id[] = {
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{ MFD_DEV_NAME, TYPE_S2MU106 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, s2mu106_i2c_id);
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#if defined(CONFIG_OF)
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static struct of_device_id s2mu106_i2c_dt_ids[] = {
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{.compatible = "samsung,s2mu106mfd"},
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{ },
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};
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#endif /* CONFIG_OF */
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#if defined(CONFIG_PM)
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static int s2mu106_suspend(struct device *dev)
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{
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struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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if (device_may_wakeup(dev))
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enable_irq_wake(s2mu106->irq);
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disable_irq(s2mu106->irq);
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return 0;
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}
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static int s2mu106_resume(struct device *dev)
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{
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struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
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struct s2mu106_dev *s2mu106 = i2c_get_clientdata(i2c);
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pr_debug("%s:%s\n", MFD_DEV_NAME, __func__);
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if (device_may_wakeup(dev))
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disable_irq_wake(s2mu106->irq);
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enable_irq(s2mu106->irq);
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return 0;
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}
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#else
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#define s2mu106_suspend NULL
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#define s2mu106_resume NULL
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#endif /* CONFIG_PM */
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const struct dev_pm_ops s2mu106_pm = {
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.suspend = s2mu106_suspend,
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.resume = s2mu106_resume,
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};
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static struct i2c_driver s2mu106_i2c_driver = {
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.driver = {
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.name = MFD_DEV_NAME,
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.owner = THIS_MODULE,
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#if defined(CONFIG_PM)
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.pm = &s2mu106_pm,
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#endif /* CONFIG_PM */
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#if defined(CONFIG_OF)
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.of_match_table = s2mu106_i2c_dt_ids,
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#endif /* CONFIG_OF */
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},
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.probe = s2mu106_i2c_probe,
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.remove = s2mu106_i2c_remove,
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.id_table = s2mu106_i2c_id,
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};
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static int __init s2mu106_i2c_init(void)
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{
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pr_info("%s:%s\n", MFD_DEV_NAME, __func__);
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return i2c_add_driver(&s2mu106_i2c_driver);
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}
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subsys_initcall(s2mu106_i2c_init);
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static void __exit s2mu106_i2c_exit(void)
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{
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i2c_del_driver(&s2mu106_i2c_driver);
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}
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module_exit(s2mu106_i2c_exit);
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MODULE_DESCRIPTION("s2mu106 multi-function core driver");
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MODULE_AUTHOR("Samsung Electronics");
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MODULE_LICENSE("GPL");
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