246 строки
6.1 KiB
C
246 строки
6.1 KiB
C
/*
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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 <jaewon02.kim@samsung.com>
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* Author: Beomho Seo <beomho.seo@samsung.com>
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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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#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/module.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(max77843->i2c->adapter, I2C_ADDR_CHG);
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if (!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 -ENODEV;
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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 int max77843_remove(struct i2c_client *i2c)
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{
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struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
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mfd_remove_devices(max77843->dev);
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regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
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i2c_unregister_device(max77843->i2c_chg);
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return 0;
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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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MODULE_DEVICE_TABLE(i2c, max77843_id);
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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 = container_of(dev, struct 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 = container_of(dev, struct 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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},
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.probe = max77843_probe,
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.remove = max77843_remove,
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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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static void __exit max77843_i2c_exit(void)
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{
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i2c_del_driver(&max77843_i2c_driver);
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}
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module_exit(max77843_i2c_exit);
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