diff options
Diffstat (limited to 'drivers/platform/x86/intel_cht_int33fe_microb.c')
| -rw-r--r-- | drivers/platform/x86/intel_cht_int33fe_microb.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/drivers/platform/x86/intel_cht_int33fe_microb.c b/drivers/platform/x86/intel_cht_int33fe_microb.c new file mode 100644 index 000000000000..20b11e0d9a75 --- /dev/null +++ b/drivers/platform/x86/intel_cht_int33fe_microb.c @@ -0,0 +1,57 @@ +// 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; +} |