123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657 |
- // 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;
- }
|