tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
8struct eeprom_93xx46_platform_data {
9 unsigned char flags;
10#define EE_ADDR8 0x01 /* 8 bit addr. cfg */
11#define EE_ADDR16 0x02 /* 16 bit addr. cfg */
12#define EE_READONLY 0x08 /* forbid writing */
13
14 unsigned int quirks;
15/* Single word read transfers only; no sequential read. */
16#define EEPROM_93XX46_QUIRK_SINGLE_WORD_READ (1 << 0)
17/* Instructions such as EWEN are (addrlen + 2) in length. */
18#define EEPROM_93XX46_QUIRK_INSTRUCTION_LENGTH (1 << 1)
19/* Add extra cycle after address during a read */
20#define EEPROM_93XX46_QUIRK_EXTRA_READ_CYCLE BIT(2)
21
22 /*
23 * optional hooks to control additional logic
24 * before and after spi transfer.
25 */
26 void (*prepare)(void *);
27 void (*finish)(void *);
28 struct gpio_desc *select;
29};