280 lines
7.0 KiB
C
280 lines
7.0 KiB
C
/*
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* max77693.c - mfd core driver for the MAX 77693
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*
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* Copyright (C) 2012 Samsung Electronics
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* SangYoung Son <hello.son@smasung.com>
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*
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* This program is not provided / owned by Maxim Integrated Products.
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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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* This driver is based on max8997.c
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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/err.h>
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#include <linux/interrupt.h>
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#include <linux/of.h>
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#include <linux/pm_runtime.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/max77693.h>
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#include <linux/mfd/max77693-private.h>
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#include <linux/regulator/machine.h>
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#include <linux/regmap.h>
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#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
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#define I2C_ADDR_MUIC (0x4A >> 1)
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#define I2C_ADDR_HAPTIC (0x90 >> 1)
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static const struct mfd_cell max77693_devs[] = {
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{ .name = "max77693-pmic", },
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{ .name = "max77693-charger", },
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{ .name = "max77693-flash", },
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{ .name = "max77693-muic", },
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{ .name = "max77693-haptic", },
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};
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int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest)
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{
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unsigned int val;
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int ret;
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ret = regmap_read(map, reg, &val);
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*dest = val;
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_read_reg);
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int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf)
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{
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int ret;
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ret = regmap_bulk_read(map, reg, buf, count);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_bulk_read);
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int max77693_write_reg(struct regmap *map, u8 reg, u8 value)
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{
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int ret;
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ret = regmap_write(map, reg, value);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_write_reg);
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int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf)
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{
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int ret;
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ret = regmap_bulk_write(map, reg, buf, count);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_bulk_write);
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int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask)
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{
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int ret;
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ret = regmap_update_bits(map, reg, mask, val);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max77693_update_reg);
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static const struct regmap_config max77693_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = MAX77693_PMIC_REG_END,
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};
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static const struct regmap_config max77693_regmap_muic_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = MAX77693_MUIC_REG_END,
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};
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static int max77693_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct max77693_dev *max77693;
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u8 reg_data;
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int ret = 0;
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max77693 = devm_kzalloc(&i2c->dev,
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sizeof(struct max77693_dev), GFP_KERNEL);
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if (max77693 == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, max77693);
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max77693->dev = &i2c->dev;
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max77693->i2c = i2c;
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max77693->irq = i2c->irq;
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max77693->type = id->driver_data;
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max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
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if (IS_ERR(max77693->regmap)) {
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ret = PTR_ERR(max77693->regmap);
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dev_err(max77693->dev, "failed to allocate register map: %d\n",
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ret);
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return ret;
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}
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ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
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®_data);
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if (ret < 0) {
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dev_err(max77693->dev, "device not found on this channel\n");
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return ret;
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} else
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dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
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max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
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if (!max77693->muic) {
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dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
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return -ENODEV;
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}
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i2c_set_clientdata(max77693->muic, max77693);
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max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
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if (!max77693->haptic) {
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dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
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ret = -ENODEV;
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goto err_i2c_haptic;
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}
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i2c_set_clientdata(max77693->haptic, max77693);
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/*
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* Initialize register map for MUIC device because use regmap-muic
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* instance of MUIC device when irq of max77693 is initialized
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* before call max77693-muic probe() function.
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*/
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max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
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&max77693_regmap_muic_config);
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if (IS_ERR(max77693->regmap_muic)) {
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ret = PTR_ERR(max77693->regmap_muic);
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dev_err(max77693->dev,
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"failed to allocate register map: %d\n", ret);
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goto err_regmap_muic;
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}
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ret = max77693_irq_init(max77693);
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if (ret < 0)
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goto err_irq;
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pm_runtime_set_active(max77693->dev);
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ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
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ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
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if (ret < 0)
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goto err_mfd;
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return ret;
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err_mfd:
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max77693_irq_exit(max77693);
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err_irq:
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err_regmap_muic:
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i2c_unregister_device(max77693->haptic);
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err_i2c_haptic:
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i2c_unregister_device(max77693->muic);
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return ret;
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}
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static int max77693_i2c_remove(struct i2c_client *i2c)
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{
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struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
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mfd_remove_devices(max77693->dev);
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max77693_irq_exit(max77693);
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i2c_unregister_device(max77693->muic);
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i2c_unregister_device(max77693->haptic);
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return 0;
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}
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static const struct i2c_device_id max77693_i2c_id[] = {
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{ "max77693", TYPE_MAX77693 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
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static int max77693_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 max77693_dev *max77693 = i2c_get_clientdata(i2c);
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if (device_may_wakeup(dev))
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irq_set_irq_wake(max77693->irq, 1);
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return 0;
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}
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static int max77693_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 max77693_dev *max77693 = i2c_get_clientdata(i2c);
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if (device_may_wakeup(dev))
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irq_set_irq_wake(max77693->irq, 0);
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return max77693_irq_resume(max77693);
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}
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static const struct dev_pm_ops max77693_pm = {
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.suspend = max77693_suspend,
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.resume = max77693_resume,
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};
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#ifdef CONFIG_OF
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static struct of_device_id max77693_dt_match[] = {
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{ .compatible = "maxim,max77693" },
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{},
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};
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#endif
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static struct i2c_driver max77693_i2c_driver = {
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.driver = {
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.name = "max77693",
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.owner = THIS_MODULE,
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.pm = &max77693_pm,
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.of_match_table = of_match_ptr(max77693_dt_match),
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},
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.probe = max77693_i2c_probe,
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.remove = max77693_i2c_remove,
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.id_table = max77693_i2c_id,
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};
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static int __init max77693_i2c_init(void)
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{
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return i2c_add_driver(&max77693_i2c_driver);
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}
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/* init early so consumer devices can complete system boot */
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subsys_initcall(max77693_i2c_init);
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static void __exit max77693_i2c_exit(void)
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{
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i2c_del_driver(&max77693_i2c_driver);
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}
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module_exit(max77693_i2c_exit);
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MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
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MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
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MODULE_LICENSE("GPL");
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