text: #ifndef PM_SMBUS_H
  #define PM_SMBUS_H
  
  #define PM_SMBUS_MAX_MSG_SIZE 32
  
  typedef struct PMSMBus {
      I2CBus *smbus;
      MemoryRegion io;
  
      uint8_t smb_stat;
      uint8_t smb_ctl;
      uint8_t smb_cmd;
      uint8_t smb_addr;
      uint8_t smb_data0;
      uint8_t smb_data1;
      uint8_t smb_data[PM_SMBUS_MAX_MSG_SIZE];
      uint8_t smb_blkdata;
      uint8_t smb_auxctl;
      uint32_t smb_index;
  
      /* Set by pm_smbus.c */
      void (*reset)(struct PMSMBus *s);
  
      /* Set by the user. */
      bool i2c_enable;
      void (*set_irq)(struct PMSMBus *s, bool enabled);
      void *opaque;
  
      /* Internally used by pm_smbus. */
  
      /* Set on block transfers after the last byte has been read, so the
         INTR bit can be set at the right time. */
      bool op_done;
  } PMSMBus;
  
  void pm_smbus_init(DeviceState *parent, PMSMBus *smb, bool force_aux_blk);
  
  #endif /* PM_SMBUS_H */
  