LXR linux/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 */
  11struct 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