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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
53e84b67 DB |
2 | #ifndef __LINUX_SPI_DS1305_H |
3 | #define __LINUX_SPI_DS1305_H | |
4 | ||
5 | /* | |
6 | * One-time configuration for ds1305 and ds1306 RTC chips. | |
7 | * | |
8 | * Put a pointer to this in spi_board_info.platform_data if you want to | |
9 | * be sure that Linux (re)initializes this as needed ... after losing | |
10 | * backup power, and potentially on the first boot. | |
11 | */ | |
12 | struct ds1305_platform_data { | |
13 | ||
14 | /* Trickle charge configuration: it's OK to leave out the MAGIC | |
15 | * bitmask; mask in either DS1 or DS2, and then one of 2K/4k/8K. | |
16 | */ | |
17 | #define DS1305_TRICKLE_MAGIC 0xa0 | |
18 | #define DS1305_TRICKLE_DS2 0x08 /* two diodes */ | |
19 | #define DS1305_TRICKLE_DS1 0x04 /* one diode */ | |
20 | #define DS1305_TRICKLE_2K 0x01 /* 2 KOhm resistance */ | |
21 | #define DS1305_TRICKLE_4K 0x02 /* 4 KOhm resistance */ | |
22 | #define DS1305_TRICKLE_8K 0x03 /* 8 KOhm resistance */ | |
23 | u8 trickle; | |
24 | ||
25 | /* set only on ds1306 parts */ | |
26 | bool is_ds1306; | |
27 | ||
28 | /* ds1306 only: enable 1 Hz output */ | |
29 | bool en_1hz; | |
30 | ||
31 | /* REVISIT: the driver currently expects nINT0 to be wired | |
32 | * as the alarm IRQ. ALM1 may also need to be set up ... | |
33 | */ | |
34 | }; | |
35 | ||
36 | #endif /* __LINUX_SPI_DS1305_H */ |