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struct acpi_smb_hc;
enum acpi_smb_protocol {
SMBUS_WRITE_QUICK = 2,
SMBUS_READ_QUICK = 3,
SMBUS_SEND_BYTE = 4,
SMBUS_RECEIVE_BYTE = 5,
SMBUS_WRITE_BYTE = 6,
SMBUS_READ_BYTE = 7,
SMBUS_WRITE_WORD = 8,
SMBUS_READ_WORD = 9,
SMBUS_WRITE_BLOCK = 0xa,
SMBUS_READ_BLOCK = 0xb,
SMBUS_PROCESS_CALL = 0xc,
SMBUS_BLOCK_PROCESS_CALL = 0xd,
};
static const u8 SMBUS_PEC = 0x80;
typedef void (*smbus_alarm_callback)(void *context);
extern int acpi_smbus_read(struct acpi_smb_hc *hc, u8 protocol, u8 address,
u8 command, u8 * data);
extern int acpi_smbus_write(struct acpi_smb_hc *hc, u8 protocol, u8 slave_address,
u8 command, u8 * data, u8 length);
extern int acpi_smbus_register_callback(struct acpi_smb_hc *hc,
smbus_alarm_callback callback, void *context);
extern int acpi_smbus_unregister_callback(struct acpi_smb_hc *hc);
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