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TOMOYO Linux Cross Reference
Linux/include/linux/spi/ds1305.h

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  1 #ifndef __LINUX_SPI_DS1305_H
  2 #define __LINUX_SPI_DS1305_H
  3 
  4 /*
  5  * One-time configuration for ds1305 and ds1306 RTC chips.
  6  *
  7  * Put a pointer to this in spi_board_info.platform_data if you want to
  8  * be sure that Linux (re)initializes this as needed ... after losing
  9  * backup power, and potentially on the first boot.
 10  */
 11 struct ds1305_platform_data {
 12 
 13         /* Trickle charge configuration:  it's OK to leave out the MAGIC
 14          * bitmask; mask in either DS1 or DS2, and then one of 2K/4k/8K.
 15          */
 16 #define DS1305_TRICKLE_MAGIC    0xa0
 17 #define DS1305_TRICKLE_DS2      0x08    /* two diodes */
 18 #define DS1305_TRICKLE_DS1      0x04    /* one diode */
 19 #define DS1305_TRICKLE_2K       0x01    /* 2 KOhm resistance */
 20 #define DS1305_TRICKLE_4K       0x02    /* 4 KOhm resistance */
 21 #define DS1305_TRICKLE_8K       0x03    /* 8 KOhm resistance */
 22         u8      trickle;
 23 
 24         /* set only on ds1306 parts */
 25         bool    is_ds1306;
 26 
 27         /* ds1306 only:  enable 1 Hz output */
 28         bool    en_1hz;
 29 
 30         /* REVISIT:  the driver currently expects nINT0 to be wired
 31          * as the alarm IRQ.  ALM1 may also need to be set up ...
 32          */
 33 };
 34 
 35 #endif /* __LINUX_SPI_DS1305_H */
 36 

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