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W1-EEPROM: Add an W1-EEPROM uclass for 1 wire EEPROMs

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We might want to access data stored onto one wire EEPROMs.
Create a framework to provide a consistent API.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
[eugen.hristev@microchip.com: reworked patch]
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
This commit is contained in:
Maxime Ripard
2018-09-18 10:35:27 +03:00
committed by Tom Rini
parent e1721ba0e6
commit c924ee25aa
7 changed files with 172 additions and 0 deletions
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33
include/w1-eeprom.h Normal file
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/* SPDX-License-Identifier: GPL-2.0+
*
* Copyright (c) 2015 Free Electrons
* Copyright (c) 2015 NextThing Co
* Copyright (c) 2018 Microchip Technology, Inc.
*
*/
#ifndef __W1_EEPROM_H
#define __W1_EEPROM_H
struct udevice;
struct w1_eeprom_ops {
/*
* Reads a buff from the given EEPROM memory, starting at
* given offset and place the results into the given buffer.
* Should read given count of bytes.
* Should return 0 on success, and normal error.h on error
*/
int (*read_buf)(struct udevice *dev, unsigned int offset,
u8 *buf, unsigned int count);
};
int w1_eeprom_read_buf(struct udevice *dev, unsigned int offset,
u8 *buf, unsigned int count);
int w1_eeprom_dm_init(void);
int w1_eeprom_register_new_device(u64 id);
int w1_eeprom_get_id(struct udevice *dev, u64 *id);
#endif