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219 lines
5.4 KiB
219 lines
5.4 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// MFD core driver for the Maxim MAX77843 |
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// |
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// Copyright (C) 2015 Samsung Electronics |
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// Author: Jaewon Kim <[email protected]> |
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// Author: Beomho Seo <[email protected]> |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include <linux/init.h> |
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#include <linux/interrupt.h> |
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#include <linux/mfd/core.h> |
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#include <linux/mfd/max77693-common.h> |
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#include <linux/mfd/max77843-private.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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static const struct mfd_cell max77843_devs[] = { |
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{ |
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.name = "max77843-muic", |
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.of_compatible = "maxim,max77843-muic", |
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}, { |
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.name = "max77843-regulator", |
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.of_compatible = "maxim,max77843-regulator", |
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}, { |
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.name = "max77843-charger", |
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.of_compatible = "maxim,max77843-charger" |
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}, { |
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.name = "max77843-fuelgauge", |
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.of_compatible = "maxim,max77843-fuelgauge", |
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}, { |
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.name = "max77843-haptic", |
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.of_compatible = "maxim,max77843-haptic", |
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}, |
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}; |
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static const struct regmap_config max77843_charger_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = MAX77843_CHG_REG_END, |
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}; |
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static const struct regmap_config max77843_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = MAX77843_SYS_REG_END, |
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}; |
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static const struct regmap_irq max77843_irqs[] = { |
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/* TOPSYS interrupts */ |
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{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, }, |
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{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, }, |
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{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, }, |
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{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, }, |
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}; |
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static const struct regmap_irq_chip max77843_irq_chip = { |
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.name = "max77843", |
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.status_base = MAX77843_SYS_REG_SYSINTSRC, |
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.mask_base = MAX77843_SYS_REG_SYSINTMASK, |
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.mask_invert = false, |
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.num_regs = 1, |
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.irqs = max77843_irqs, |
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.num_irqs = ARRAY_SIZE(max77843_irqs), |
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}; |
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/* Charger and Charger regulator use same regmap. */ |
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static int max77843_chg_init(struct max77693_dev *max77843) |
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{ |
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int ret; |
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max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG); |
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if (IS_ERR(max77843->i2c_chg)) { |
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dev_err(&max77843->i2c->dev, |
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"Cannot allocate I2C device for Charger\n"); |
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return PTR_ERR(max77843->i2c_chg); |
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} |
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i2c_set_clientdata(max77843->i2c_chg, max77843); |
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max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg, |
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&max77843_charger_regmap_config); |
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if (IS_ERR(max77843->regmap_chg)) { |
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ret = PTR_ERR(max77843->regmap_chg); |
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goto err_chg_i2c; |
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} |
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return 0; |
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err_chg_i2c: |
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i2c_unregister_device(max77843->i2c_chg); |
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return ret; |
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} |
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static int max77843_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 *max77843; |
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unsigned int reg_data; |
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int ret; |
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max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL); |
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if (!max77843) |
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return -ENOMEM; |
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i2c_set_clientdata(i2c, max77843); |
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max77843->dev = &i2c->dev; |
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max77843->i2c = i2c; |
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max77843->irq = i2c->irq; |
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max77843->type = id->driver_data; |
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max77843->regmap = devm_regmap_init_i2c(i2c, |
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&max77843_regmap_config); |
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if (IS_ERR(max77843->regmap)) { |
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dev_err(&i2c->dev, "Failed to allocate topsys register map\n"); |
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return PTR_ERR(max77843->regmap); |
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} |
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ret = regmap_add_irq_chip(max77843->regmap, max77843->irq, |
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IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, |
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0, &max77843_irq_chip, &max77843->irq_data_topsys); |
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if (ret) { |
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dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n"); |
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return ret; |
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} |
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ret = regmap_read(max77843->regmap, |
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MAX77843_SYS_REG_PMICID, ®_data); |
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if (ret < 0) { |
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dev_err(&i2c->dev, "Failed to read PMIC ID\n"); |
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goto err_pmic_id; |
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} |
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dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data); |
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ret = max77843_chg_init(max77843); |
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if (ret) { |
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dev_err(&i2c->dev, "Failed to init Charger\n"); |
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goto err_pmic_id; |
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} |
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ret = regmap_update_bits(max77843->regmap, |
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MAX77843_SYS_REG_INTSRCMASK, |
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MAX77843_INTSRC_MASK_MASK, |
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(unsigned int)~MAX77843_INTSRC_MASK_MASK); |
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if (ret < 0) { |
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dev_err(&i2c->dev, "Failed to unmask interrupt source\n"); |
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goto err_pmic_id; |
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} |
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ret = mfd_add_devices(max77843->dev, -1, max77843_devs, |
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ARRAY_SIZE(max77843_devs), NULL, 0, NULL); |
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if (ret < 0) { |
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dev_err(&i2c->dev, "Failed to add mfd device\n"); |
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goto err_pmic_id; |
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} |
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device_init_wakeup(max77843->dev, true); |
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return 0; |
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err_pmic_id: |
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regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys); |
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return ret; |
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} |
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static const struct of_device_id max77843_dt_match[] = { |
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{ .compatible = "maxim,max77843", }, |
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{ }, |
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}; |
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static const struct i2c_device_id max77843_id[] = { |
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{ "max77843", TYPE_MAX77843, }, |
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{ }, |
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}; |
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static int __maybe_unused max77843_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 max77693_dev *max77843 = i2c_get_clientdata(i2c); |
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disable_irq(max77843->irq); |
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if (device_may_wakeup(dev)) |
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enable_irq_wake(max77843->irq); |
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return 0; |
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} |
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static int __maybe_unused max77843_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 max77693_dev *max77843 = i2c_get_clientdata(i2c); |
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if (device_may_wakeup(dev)) |
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disable_irq_wake(max77843->irq); |
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enable_irq(max77843->irq); |
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return 0; |
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} |
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static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume); |
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static struct i2c_driver max77843_i2c_driver = { |
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.driver = { |
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.name = "max77843", |
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.pm = &max77843_pm, |
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.of_match_table = max77843_dt_match, |
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.suppress_bind_attrs = true, |
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}, |
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.probe = max77843_probe, |
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.id_table = max77843_id, |
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}; |
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static int __init max77843_i2c_init(void) |
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{ |
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return i2c_add_driver(&max77843_i2c_driver); |
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} |
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subsys_initcall(max77843_i2c_init);
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