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- /* SPDX-License-Identifier: GPL-2.0 */
- #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 */
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