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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-02-19 06:14:24 +0000 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-02-19 06:14:24 +0000 |
| commit | 6fafeb146e9efd59140ea58cebd7dd38ae9a6379 (patch) | |
| tree | 7db89ba6a28932514b105d620bba4884ec332ec3 /libdde_linux26/contrib/include/linux/spi/ds1305.h | |
| parent | 38c2c2458e3f4ecb329ff35621806252aac209b9 (diff) | |
| parent | 8df772b3c665e663f6f9d2a70f9c691590bd3f91 (diff) | |
Merge branch 'dde' into upstream-merged
Diffstat (limited to 'libdde_linux26/contrib/include/linux/spi/ds1305.h')
| -rw-r--r-- | libdde_linux26/contrib/include/linux/spi/ds1305.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/libdde_linux26/contrib/include/linux/spi/ds1305.h b/libdde_linux26/contrib/include/linux/spi/ds1305.h new file mode 100644 index 00000000..287ec830 --- /dev/null +++ b/libdde_linux26/contrib/include/linux/spi/ds1305.h @@ -0,0 +1,35 @@ +#ifndef __LINUX_SPI_DS1305_H +#define __LINUX_SPI_DS1305_H + +/* + * One-time configuration for ds1305 and ds1306 RTC chips. + * + * Put a pointer to this in spi_board_info.platform_data if you want to + * be sure that Linux (re)initializes this as needed ... after losing + * backup power, and potentially on the first boot. + */ +struct ds1305_platform_data { + + /* Trickle charge configuration: it's OK to leave out the MAGIC + * bitmask; mask in either DS1 or DS2, and then one of 2K/4k/8K. + */ +#define DS1305_TRICKLE_MAGIC 0xa0 +#define DS1305_TRICKLE_DS2 0x08 /* two diodes */ +#define DS1305_TRICKLE_DS1 0x04 /* one diode */ +#define DS1305_TRICKLE_2K 0x01 /* 2 KOhm resistance */ +#define DS1305_TRICKLE_4K 0x02 /* 4 KOhm resistance */ +#define DS1305_TRICKLE_8K 0x03 /* 8 KOhm resistance */ + u8 trickle; + + /* set only on ds1306 parts */ + bool is_ds1306; + + /* ds1306 only: enable 1 Hz output */ + bool en_1hz; + + /* REVISIT: the driver currently expects nINT0 to be wired + * as the alarm IRQ. ALM1 may also need to be set up ... + */ +}; + +#endif /* __LINUX_SPI_DS1305_H */ |