diff options
Diffstat (limited to 'include/linux/spi')
-rw-r--r-- | include/linux/spi/ds1305.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/spi/ds1305.h b/include/linux/spi/ds1305.h new file mode 100644 index 000000000000..287ec830eab7 --- /dev/null +++ b/include/linux/spi/ds1305.h | |||
@@ -0,0 +1,35 @@ | |||
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 */ | ||