492 lines
12 KiB
C
492 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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//
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// max8997.c - mfd core driver for the Maxim 8966 and 8997
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//
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// Copyright (C) 2011 Samsung Electronics
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// MyungJoo Ham <myungjoo.ham@samsung.com>
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//
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// This driver is based on max8998.c
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/of.h>
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#include <linux/of_irq.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/init.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/max8997.h>
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#include <linux/mfd/max8997-private.h>
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#define I2C_ADDR_PMIC (0xCC >> 1)
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#define I2C_ADDR_MUIC (0x4A >> 1)
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#define I2C_ADDR_BATTERY (0x6C >> 1)
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#define I2C_ADDR_RTC (0x0C >> 1)
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#define I2C_ADDR_HAPTIC (0x90 >> 1)
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static const struct mfd_cell max8997_devs[] = {
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{ .name = "max8997-pmic", },
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{ .name = "max8997-rtc", },
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{ .name = "max8997-battery", },
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{ .name = "max8997-haptic", },
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{ .name = "max8997-muic", },
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{ .name = "max8997-led", .id = 1 },
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{ .name = "max8997-led", .id = 2 },
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};
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#ifdef CONFIG_OF
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static const struct of_device_id max8997_pmic_dt_match[] = {
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{ .compatible = "maxim,max8997-pmic", .data = (void *)TYPE_MAX8997 },
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{},
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};
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#endif
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int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&max8997->iolock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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mutex_unlock(&max8997->iolock);
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if (ret < 0)
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return ret;
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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(max8997_read_reg);
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int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&max8997->iolock);
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ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
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mutex_unlock(&max8997->iolock);
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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(max8997_bulk_read);
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int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
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{
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&max8997->iolock);
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ret = i2c_smbus_write_byte_data(i2c, reg, value);
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mutex_unlock(&max8997->iolock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max8997_write_reg);
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int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
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{
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&max8997->iolock);
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ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
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mutex_unlock(&max8997->iolock);
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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(max8997_bulk_write);
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int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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{
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&max8997->iolock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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if (ret >= 0) {
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u8 old_val = ret & 0xff;
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u8 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(&max8997->iolock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(max8997_update_reg);
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/*
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* Only the common platform data elements for max8997 are parsed here from the
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* device tree. Other sub-modules of max8997 such as pmic, rtc and others have
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* to parse their own platform data elements from device tree.
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*
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* The max8997 platform data structure is instantiated here and the drivers for
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* the sub-modules need not instantiate another instance while parsing their
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* platform data.
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*/
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static struct max8997_platform_data *max8997_i2c_parse_dt_pdata(
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struct device *dev)
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{
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struct max8997_platform_data *pd;
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pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
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if (!pd)
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return ERR_PTR(-ENOMEM);
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pd->ono = irq_of_parse_and_map(dev->of_node, 1);
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return pd;
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}
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static inline unsigned long max8997_i2c_get_driver_data(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) {
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const struct of_device_id *match;
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match = of_match_node(max8997_pmic_dt_match, i2c->dev.of_node);
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return (unsigned long)match->data;
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}
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return id->driver_data;
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}
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static int max8997_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 max8997_dev *max8997;
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struct max8997_platform_data *pdata = dev_get_platdata(&i2c->dev);
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int ret = 0;
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max8997 = devm_kzalloc(&i2c->dev, sizeof(struct max8997_dev),
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GFP_KERNEL);
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if (max8997 == NULL)
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return -ENOMEM;
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i2c_set_clientdata(i2c, max8997);
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max8997->dev = &i2c->dev;
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max8997->i2c = i2c;
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max8997->type = max8997_i2c_get_driver_data(i2c, id);
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max8997->irq = i2c->irq;
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if (IS_ENABLED(CONFIG_OF) && max8997->dev->of_node) {
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pdata = max8997_i2c_parse_dt_pdata(max8997->dev);
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if (IS_ERR(pdata))
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return PTR_ERR(pdata);
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}
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if (!pdata)
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return ret;
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max8997->pdata = pdata;
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max8997->ono = pdata->ono;
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mutex_init(&max8997->iolock);
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max8997->rtc = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_RTC);
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if (IS_ERR(max8997->rtc)) {
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dev_err(max8997->dev, "Failed to allocate I2C device for RTC\n");
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return PTR_ERR(max8997->rtc);
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}
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i2c_set_clientdata(max8997->rtc, max8997);
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max8997->haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);
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if (IS_ERR(max8997->haptic)) {
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dev_err(max8997->dev, "Failed to allocate I2C device for Haptic\n");
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ret = PTR_ERR(max8997->haptic);
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goto err_i2c_haptic;
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}
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i2c_set_clientdata(max8997->haptic, max8997);
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max8997->muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);
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if (IS_ERR(max8997->muic)) {
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dev_err(max8997->dev, "Failed to allocate I2C device for MUIC\n");
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ret = PTR_ERR(max8997->muic);
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goto err_i2c_muic;
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}
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i2c_set_clientdata(max8997->muic, max8997);
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pm_runtime_set_active(max8997->dev);
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max8997_irq_init(max8997);
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ret = mfd_add_devices(max8997->dev, -1, max8997_devs,
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ARRAY_SIZE(max8997_devs),
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NULL, 0, NULL);
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if (ret < 0) {
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dev_err(max8997->dev, "failed to add MFD devices %d\n", ret);
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goto err_mfd;
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}
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/*
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* TODO: enable others (flash, muic, rtc, battery, ...) and
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* check the return value
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*/
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/* MAX8997 has a power button input. */
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device_init_wakeup(max8997->dev, true);
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return ret;
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err_mfd:
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mfd_remove_devices(max8997->dev);
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i2c_unregister_device(max8997->muic);
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err_i2c_muic:
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i2c_unregister_device(max8997->haptic);
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err_i2c_haptic:
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i2c_unregister_device(max8997->rtc);
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return ret;
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}
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static const struct i2c_device_id max8997_i2c_id[] = {
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{ "max8997", TYPE_MAX8997 },
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{ "max8966", TYPE_MAX8966 },
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{ }
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};
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static u8 max8997_dumpaddr_pmic[] = {
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MAX8997_REG_INT1MSK,
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MAX8997_REG_INT2MSK,
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MAX8997_REG_INT3MSK,
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MAX8997_REG_INT4MSK,
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MAX8997_REG_MAINCON1,
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MAX8997_REG_MAINCON2,
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MAX8997_REG_BUCKRAMP,
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MAX8997_REG_BUCK1CTRL,
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MAX8997_REG_BUCK1DVS1,
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MAX8997_REG_BUCK1DVS2,
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MAX8997_REG_BUCK1DVS3,
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MAX8997_REG_BUCK1DVS4,
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MAX8997_REG_BUCK1DVS5,
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MAX8997_REG_BUCK1DVS6,
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MAX8997_REG_BUCK1DVS7,
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MAX8997_REG_BUCK1DVS8,
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MAX8997_REG_BUCK2CTRL,
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MAX8997_REG_BUCK2DVS1,
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MAX8997_REG_BUCK2DVS2,
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MAX8997_REG_BUCK2DVS3,
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MAX8997_REG_BUCK2DVS4,
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MAX8997_REG_BUCK2DVS5,
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MAX8997_REG_BUCK2DVS6,
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MAX8997_REG_BUCK2DVS7,
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MAX8997_REG_BUCK2DVS8,
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MAX8997_REG_BUCK3CTRL,
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MAX8997_REG_BUCK3DVS,
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MAX8997_REG_BUCK4CTRL,
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MAX8997_REG_BUCK4DVS,
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MAX8997_REG_BUCK5CTRL,
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MAX8997_REG_BUCK5DVS1,
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MAX8997_REG_BUCK5DVS2,
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MAX8997_REG_BUCK5DVS3,
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MAX8997_REG_BUCK5DVS4,
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MAX8997_REG_BUCK5DVS5,
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MAX8997_REG_BUCK5DVS6,
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MAX8997_REG_BUCK5DVS7,
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MAX8997_REG_BUCK5DVS8,
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MAX8997_REG_BUCK6CTRL,
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MAX8997_REG_BUCK6BPSKIPCTRL,
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MAX8997_REG_BUCK7CTRL,
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MAX8997_REG_BUCK7DVS,
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MAX8997_REG_LDO1CTRL,
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MAX8997_REG_LDO2CTRL,
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MAX8997_REG_LDO3CTRL,
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MAX8997_REG_LDO4CTRL,
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MAX8997_REG_LDO5CTRL,
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MAX8997_REG_LDO6CTRL,
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MAX8997_REG_LDO7CTRL,
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MAX8997_REG_LDO8CTRL,
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MAX8997_REG_LDO9CTRL,
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MAX8997_REG_LDO10CTRL,
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MAX8997_REG_LDO11CTRL,
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MAX8997_REG_LDO12CTRL,
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MAX8997_REG_LDO13CTRL,
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MAX8997_REG_LDO14CTRL,
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MAX8997_REG_LDO15CTRL,
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MAX8997_REG_LDO16CTRL,
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MAX8997_REG_LDO17CTRL,
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MAX8997_REG_LDO18CTRL,
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MAX8997_REG_LDO21CTRL,
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MAX8997_REG_MBCCTRL1,
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MAX8997_REG_MBCCTRL2,
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MAX8997_REG_MBCCTRL3,
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MAX8997_REG_MBCCTRL4,
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MAX8997_REG_MBCCTRL5,
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MAX8997_REG_MBCCTRL6,
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MAX8997_REG_OTPCGHCVS,
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MAX8997_REG_SAFEOUTCTRL,
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MAX8997_REG_LBCNFG1,
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MAX8997_REG_LBCNFG2,
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MAX8997_REG_BBCCTRL,
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MAX8997_REG_FLASH1_CUR,
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MAX8997_REG_FLASH2_CUR,
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MAX8997_REG_MOVIE_CUR,
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MAX8997_REG_GSMB_CUR,
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MAX8997_REG_BOOST_CNTL,
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MAX8997_REG_LEN_CNTL,
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MAX8997_REG_FLASH_CNTL,
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MAX8997_REG_WDT_CNTL,
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MAX8997_REG_MAXFLASH1,
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MAX8997_REG_MAXFLASH2,
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MAX8997_REG_FLASHSTATUSMASK,
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MAX8997_REG_GPIOCNTL1,
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MAX8997_REG_GPIOCNTL2,
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MAX8997_REG_GPIOCNTL3,
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MAX8997_REG_GPIOCNTL4,
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MAX8997_REG_GPIOCNTL5,
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MAX8997_REG_GPIOCNTL6,
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MAX8997_REG_GPIOCNTL7,
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MAX8997_REG_GPIOCNTL8,
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MAX8997_REG_GPIOCNTL9,
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MAX8997_REG_GPIOCNTL10,
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MAX8997_REG_GPIOCNTL11,
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MAX8997_REG_GPIOCNTL12,
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MAX8997_REG_LDO1CONFIG,
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MAX8997_REG_LDO2CONFIG,
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MAX8997_REG_LDO3CONFIG,
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MAX8997_REG_LDO4CONFIG,
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MAX8997_REG_LDO5CONFIG,
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MAX8997_REG_LDO6CONFIG,
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MAX8997_REG_LDO7CONFIG,
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MAX8997_REG_LDO8CONFIG,
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MAX8997_REG_LDO9CONFIG,
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MAX8997_REG_LDO10CONFIG,
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MAX8997_REG_LDO11CONFIG,
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MAX8997_REG_LDO12CONFIG,
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MAX8997_REG_LDO13CONFIG,
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MAX8997_REG_LDO14CONFIG,
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MAX8997_REG_LDO15CONFIG,
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MAX8997_REG_LDO16CONFIG,
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MAX8997_REG_LDO17CONFIG,
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MAX8997_REG_LDO18CONFIG,
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MAX8997_REG_LDO21CONFIG,
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MAX8997_REG_DVSOKTIMER1,
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MAX8997_REG_DVSOKTIMER2,
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MAX8997_REG_DVSOKTIMER4,
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MAX8997_REG_DVSOKTIMER5,
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};
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static u8 max8997_dumpaddr_muic[] = {
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MAX8997_MUIC_REG_INTMASK1,
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MAX8997_MUIC_REG_INTMASK2,
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MAX8997_MUIC_REG_INTMASK3,
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MAX8997_MUIC_REG_CDETCTRL,
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MAX8997_MUIC_REG_CONTROL1,
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MAX8997_MUIC_REG_CONTROL2,
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MAX8997_MUIC_REG_CONTROL3,
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};
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static u8 max8997_dumpaddr_haptic[] = {
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MAX8997_HAPTIC_REG_CONF1,
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MAX8997_HAPTIC_REG_CONF2,
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MAX8997_HAPTIC_REG_DRVCONF,
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MAX8997_HAPTIC_REG_CYCLECONF1,
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MAX8997_HAPTIC_REG_CYCLECONF2,
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MAX8997_HAPTIC_REG_SIGCONF1,
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MAX8997_HAPTIC_REG_SIGCONF2,
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MAX8997_HAPTIC_REG_SIGCONF3,
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MAX8997_HAPTIC_REG_SIGCONF4,
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MAX8997_HAPTIC_REG_SIGDC1,
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MAX8997_HAPTIC_REG_SIGDC2,
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MAX8997_HAPTIC_REG_SIGPWMDC1,
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MAX8997_HAPTIC_REG_SIGPWMDC2,
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MAX8997_HAPTIC_REG_SIGPWMDC3,
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MAX8997_HAPTIC_REG_SIGPWMDC4,
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};
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static int max8997_freeze(struct device *dev)
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{
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struct i2c_client *i2c = to_i2c_client(dev);
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int i;
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for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
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max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
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&max8997->reg_dump[i]);
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for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
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max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
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&max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
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for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
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max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
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&max8997->reg_dump[i + MAX8997_REG_PMIC_END +
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MAX8997_MUIC_REG_END]);
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return 0;
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}
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static int max8997_restore(struct device *dev)
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{
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struct i2c_client *i2c = to_i2c_client(dev);
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struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
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int i;
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for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
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max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
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max8997->reg_dump[i]);
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for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
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max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
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max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
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for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
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max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
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max8997->reg_dump[i + MAX8997_REG_PMIC_END +
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MAX8997_MUIC_REG_END]);
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|
|
return 0;
|
|
}
|
|
|
|
static int max8997_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(dev);
|
|
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
|
|
|
|
disable_irq(max8997->irq);
|
|
if (device_may_wakeup(dev))
|
|
irq_set_irq_wake(max8997->irq, 1);
|
|
return 0;
|
|
}
|
|
|
|
static int max8997_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(dev);
|
|
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
|
|
|
|
if (device_may_wakeup(dev))
|
|
irq_set_irq_wake(max8997->irq, 0);
|
|
enable_irq(max8997->irq);
|
|
return max8997_irq_resume(max8997);
|
|
}
|
|
|
|
static const struct dev_pm_ops max8997_pm = {
|
|
.suspend = max8997_suspend,
|
|
.resume = max8997_resume,
|
|
.freeze = max8997_freeze,
|
|
.restore = max8997_restore,
|
|
};
|
|
|
|
static struct i2c_driver max8997_i2c_driver = {
|
|
.driver = {
|
|
.name = "max8997",
|
|
.pm = &max8997_pm,
|
|
.suppress_bind_attrs = true,
|
|
.of_match_table = of_match_ptr(max8997_pmic_dt_match),
|
|
},
|
|
.probe = max8997_i2c_probe,
|
|
.id_table = max8997_i2c_id,
|
|
};
|
|
|
|
static int __init max8997_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&max8997_i2c_driver);
|
|
}
|
|
/* init early so consumer devices can complete system boot */
|
|
subsys_initcall(max8997_i2c_init);
|