58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Intel Cherry Trail ACPI INT33FE pseudo device driver for devices with
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* USB Micro-B connector (e.g. without of FUSB302 USB Type-C controller)
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*
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* Copyright (C) 2019 Yauhen Kharuzhy <jekhor@gmail.com>
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*
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* At least one Intel Cherry Trail based device which ship with Windows 10
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* (Lenovo YogaBook YB1-X91L/F tablet), have this weird INT33FE ACPI device
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* with a CRS table with 2 I2cSerialBusV2 resources, for 2 different chips
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* attached to various i2c busses:
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* 1. The Whiskey Cove PMIC, which is also described by the INT34D3 ACPI device
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* 2. TI BQ27542 Fuel Gauge Controller
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*
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* So this driver is a stub / pseudo driver whose only purpose is to
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* instantiate i2c-client for battery fuel gauge, so that standard i2c driver
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* for these chip can bind to the it.
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*/
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#include <linux/acpi.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/consumer.h>
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#include <linux/slab.h>
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#include <linux/usb/pd.h>
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#include "intel_cht_int33fe_common.h"
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static const char * const bq27xxx_suppliers[] = { "bq25890-charger" };
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static const struct property_entry bq27xxx_props[] = {
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PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq27xxx_suppliers),
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{ }
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};
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int cht_int33fe_microb_probe(struct cht_int33fe_data *data)
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{
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struct device *dev = data->dev;
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struct i2c_board_info board_info;
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memset(&board_info, 0, sizeof(board_info));
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strscpy(board_info.type, "bq27542", ARRAY_SIZE(board_info.type));
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board_info.dev_name = "bq27542";
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board_info.properties = bq27xxx_props;
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data->battery_fg = i2c_acpi_new_device(dev, 1, &board_info);
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return PTR_ERR_OR_ZERO(data->battery_fg);
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}
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int cht_int33fe_microb_remove(struct cht_int33fe_data *data)
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{
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i2c_unregister_device(data->battery_fg);
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return 0;
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}
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