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