| /* 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 */ |