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490 lines
12 KiB
490 lines
12 KiB
// 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 <[email protected]> |
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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_device.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 (i2c->dev.of_node) |
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return (unsigned long)of_device_get_match_data(&i2c->dev); |
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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; |
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} |
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static int max8997_suspend(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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disable_irq(max8997->irq); |
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if (device_may_wakeup(dev)) |
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irq_set_irq_wake(max8997->irq, 1); |
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return 0; |
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} |
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static int max8997_resume(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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if (device_may_wakeup(dev)) |
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irq_set_irq_wake(max8997->irq, 0); |
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enable_irq(max8997->irq); |
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return max8997_irq_resume(max8997); |
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} |
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static const struct dev_pm_ops max8997_pm = { |
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.suspend = max8997_suspend, |
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.resume = max8997_resume, |
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.freeze = max8997_freeze, |
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.restore = max8997_restore, |
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}; |
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static struct i2c_driver max8997_i2c_driver = { |
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.driver = { |
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.name = "max8997", |
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.pm = &max8997_pm, |
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.suppress_bind_attrs = true, |
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.of_match_table = of_match_ptr(max8997_pmic_dt_match), |
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}, |
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.probe = max8997_i2c_probe, |
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.id_table = max8997_i2c_id, |
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}; |
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static int __init max8997_i2c_init(void) |
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{ |
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return i2c_add_driver(&max8997_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(max8997_i2c_init);
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