include/linux/spi/ds1305.h

   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 */