| David Brownell | 53e84b6 | 2008-07-23 21:30:36 -0700 | [diff] [blame] | 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 */ |