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