sbshc.h

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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);