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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;

enum acpi_sbs_device_addr {

        ACPI_SBS_CHARGER = 0x9,

        ACPI_SBS_MANAGER = 0xa,

        ACPI_SBS_BATTERY = 0xb,

};

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);