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