drivers/acpi/sbshc.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 struct acpi_smb_hc;
   3 enum acpi_smb_protocol {
   4         SMBUS_WRITE_QUICK = 2,
   5         SMBUS_READ_QUICK = 3,
   6         SMBUS_SEND_BYTE = 4,
   7         SMBUS_RECEIVE_BYTE = 5,
   8         SMBUS_WRITE_BYTE = 6,
   9         SMBUS_READ_BYTE = 7,
  10         SMBUS_WRITE_WORD  = 8,
  11         SMBUS_READ_WORD  = 9,
  12         SMBUS_WRITE_BLOCK = 0xa,
  13         SMBUS_READ_BLOCK = 0xb,
  14         SMBUS_PROCESS_CALL = 0xc,
  15         SMBUS_BLOCK_PROCESS_CALL = 0xd,
  16 };
  17
  18 static const u8 SMBUS_PEC = 0x80;
  19
  20 enum acpi_sbs_device_addr {
  21         ACPI_SBS_CHARGER = 0x9,
  22         ACPI_SBS_MANAGER = 0xa,
  23         ACPI_SBS_BATTERY = 0xb,
  24 };
  25
  26 typedef void (*smbus_alarm_callback)(void *context);
  27
  28 extern int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,
  29                u8 command, u8 * data);
  30 extern int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 slave_address,
  31                 u8 command, u8 * data, u8 length);
  32 extern int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
  33                                  smbus_alarm_callback callback, void *context);
  34 extern int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc);