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