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   7 #include <linux/mutex.h>
   8 
   9 struct sch56xx_watchdog_data;
  10 
  11 int sch56xx_read_virtual_reg(u16 addr, u16 reg);
  12 int sch56xx_write_virtual_reg(u16 addr, u16 reg, u8 val);
  13 int sch56xx_read_virtual_reg16(u16 addr, u16 reg);
  14 int sch56xx_read_virtual_reg12(u16 addr, u16 msb_reg, u16 lsn_reg,
  15                                int high_nibble);
  16 
  17 struct sch56xx_watchdog_data *sch56xx_watchdog_register(struct device *parent,
  18         u16 addr, u32 revision, struct mutex *io_lock, int check_enabled);
  19 void sch56xx_watchdog_unregister(struct sch56xx_watchdog_data *data);