eeprom_93xx46.h 879 B

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Module: eeprom_93xx46
  4. * platform description for 93xx46 EEPROMs.
  5. */
  6. #include <linux/gpio/consumer.h>
  7. struct eeprom_93xx46_platform_data {
  8. unsigned char flags;
  9. #define EE_ADDR8 0x01 /* 8 bit addr. cfg */
  10. #define EE_ADDR16 0x02 /* 16 bit addr. cfg */
  11. #define EE_READONLY 0x08 /* forbid writing */
  12. unsigned int quirks;
  13. /* Single word read transfers only; no sequential read. */
  14. #define EEPROM_93XX46_QUIRK_SINGLE_WORD_READ (1 << 0)
  15. /* Instructions such as EWEN are (addrlen + 2) in length. */
  16. #define EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH (1 << 1)
  17. /* Add extra cycle after address during a read */
  18. #define EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE BIT(2)
  19. /*
  20. * optional hooks to control additional logic
  21. * before and after spi transfer.
  22. */
  23. void (*prepare)(void *);
  24. void (*finish)(void *);
  25. struct gpio_desc *select;
  26. };