intel_cht_int33fe_microb.c 1.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Intel Cherry Trail ACPI INT33FE pseudo device driver for devices with
  4. * USB Micro-B connector (e.g. without of FUSB302 USB Type-C controller)
  5. *
  6. * Copyright (C) 2019 Yauhen Kharuzhy <jekhor@gmail.com>
  7. *
  8. * At least one Intel Cherry Trail based device which ship with Windows 10
  9. * (Lenovo YogaBook YB1-X91L/F tablet), have this weird INT33FE ACPI device
  10. * with a CRS table with 2 I2cSerialBusV2 resources, for 2 different chips
  11. * attached to various i2c busses:
  12. * 1. The Whiskey Cove PMIC, which is also described by the INT34D3 ACPI device
  13. * 2. TI BQ27542 Fuel Gauge Controller
  14. *
  15. * So this driver is a stub / pseudo driver whose only purpose is to
  16. * instantiate i2c-client for battery fuel gauge, so that standard i2c driver
  17. * for these chip can bind to the it.
  18. */
  19. #include <linux/acpi.h>
  20. #include <linux/i2c.h>
  21. #include <linux/module.h>
  22. #include <linux/pci.h>
  23. #include <linux/platform_device.h>
  24. #include <linux/regulator/consumer.h>
  25. #include <linux/slab.h>
  26. #include <linux/usb/pd.h>
  27. #include "intel_cht_int33fe_common.h"
  28. static const char * const bq27xxx_suppliers[] = { "bq25890-charger" };
  29. static const struct property_entry bq27xxx_props[] = {
  30. PROPERTY_ENTRY_STRING_ARRAY("supplied-from", bq27xxx_suppliers),
  31. { }
  32. };
  33. int cht_int33fe_microb_probe(struct cht_int33fe_data *data)
  34. {
  35. struct device *dev = data->dev;
  36. struct i2c_board_info board_info;
  37. memset(&board_info, 0, sizeof(board_info));
  38. strscpy(board_info.type, "bq27542", ARRAY_SIZE(board_info.type));
  39. board_info.dev_name = "bq27542";
  40. board_info.properties = bq27xxx_props;
  41. data->battery_fg = i2c_acpi_new_device(dev, 1, &board_info);
  42. return PTR_ERR_OR_ZERO(data->battery_fg);
  43. }
  44. int cht_int33fe_microb_remove(struct cht_int33fe_data *data)
  45. {
  46. i2c_unregister_device(data->battery_fg);
  47. return 0;
  48. }