ds1305.h

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#ifndef __LINUX_SPI_DS1305_H
#define __LINUX_SPI_DS1305_H

/*
 * One-time configuration for ds1305 and ds1306 RTC chips.
 *
 * Put a pointer to this in spi_board_info.platform_data if you want to
 * be sure that Linux (re)initializes this as needed ... after losing
 * backup power, and potentially on the first boot.
 */
struct ds1305_platform_data {

    /* Trickle charge configuration:  it's OK to leave out the MAGIC
     * bitmask; mask in either DS1 or DS2, and then one of 2K/4k/8K.
     */
#define DS1305_TRICKLE_MAGIC    0xa0
#define DS1305_TRICKLE_DS2  0x08    /* two diodes */
#define DS1305_TRICKLE_DS1  0x04    /* one diode */
#define DS1305_TRICKLE_2K   0x01    /* 2 KOhm resistance */
#define DS1305_TRICKLE_4K   0x02    /* 4 KOhm resistance */
#define DS1305_TRICKLE_8K   0x03    /* 8 KOhm resistance */
    u8  trickle;

    /* set only on ds1306 parts */
    bool    is_ds1306;

    /* ds1306 only:  enable 1 Hz output */
    bool    en_1hz;

    /* REVISIT:  the driver currently expects nINT0 to be wired
     * as the alarm IRQ.  ALM1 may also need to be set up ...
     */
};

#endif /* __LINUX_SPI_DS1305_H */