linux-stable/include/linux/eeprom_93xx46.h
Emmanuel Gil Peyrot 14374fbb3f misc: eeprom_93xx46: Add new 93c56 and 93c66 compatible strings
These two devices have respectively 2048 and 4096 bits of storage,
compared to 1024 for the 93c46.

Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Link: https://lore.kernel.org/r/20210511210727.24895-3-linkmauve@linkmauve.fr
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-05-14 13:45:24 +02:00

32 lines
1 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Module: eeprom_93xx46
* platform description for 93xx46 EEPROMs.
*/
#include <linux/gpio/consumer.h>
struct eeprom_93xx46_platform_data {
unsigned char flags;
#define EE_ADDR8 0x01 /* 8 bit addr. cfg */
#define EE_ADDR16 0x02 /* 16 bit addr. cfg */
#define EE_READONLY 0x08 /* forbid writing */
#define EE_SIZE1K 0x10 /* 1 kb of data, that is a 93xx46 */
#define EE_SIZE2K 0x20 /* 2 kb of data, that is a 93xx56 */
#define EE_SIZE4K 0x40 /* 4 kb of data, that is a 93xx66 */
unsigned int quirks;
/* Single word read transfers only; no sequential read. */
#define EEPROM_93XX46_QUIRK_SINGLE_WORD_READ (1 << 0)
/* Instructions such as EWEN are (addrlen + 2) in length. */
#define EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH (1 << 1)
/* Add extra cycle after address during a read */
#define EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE BIT(2)
/*
* optional hooks to control additional logic
* before and after spi transfer.
*/
void (*prepare)(void *);
void (*finish)(void *);
struct gpio_desc *select;
};