9f782e9e82
Allows users to specify binary data to initialize an EEPROM, allowing users to emulate data programmed at manufacturing time. - Added init_rom and init_rom_size attributes to TYPE_AT24C_EE - Added at24c_eeprom_init_rom helper function to initialize attributes - If -drive property is provided, it overrides init_rom data Signed-off-by: Peter Delevoryas <peter@pjd.dev> Reviewed-by: Joel Stanley <joel@jms.id.au> Reviewed-by: Corey Minyard <cminyard@mvista.com> Reviewed-by: Cédric Le Goater <clg@kaod.org> Tested-by: Ninad Palsule <ninadpalsule@us.ibm.com> Link: https://lore.kernel.org/r/20230128060543.95582-4-peter@pjd.dev Signed-off-by: Cédric Le Goater <clg@kaod.org>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* SPDX-License-Identifier: GPL-2.0-only
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*/
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#ifndef EEPROM_AT24C_H
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#define EEPROM_AT24C_H
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#include "hw/i2c/i2c.h"
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/*
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* Create and realize an AT24C EEPROM device on the heap.
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* @bus: I2C bus to put it on
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* @address: I2C address of the EEPROM slave when put on a bus
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* @rom_size: size of the EEPROM
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*
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* Create the device state structure, initialize it, put it on the specified
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* @bus, and drop the reference to it (the device is realized).
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*/
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I2CSlave *at24c_eeprom_init(I2CBus *bus, uint8_t address, uint32_t rom_size);
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/*
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* Create and realize an AT24C EEPROM device on the heap with initial data.
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* @bus: I2C bus to put it on
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* @address: I2C address of the EEPROM slave when put on a bus
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* @rom_size: size of the EEPROM
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* @init_rom: Array of bytes to initialize EEPROM memory with
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* @init_rom_size: Size of @init_rom, must be less than or equal to @rom_size
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*
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* Create the device state structure, initialize it, put it on the specified
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* @bus, and drop the reference to it (the device is realized). Copies the data
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* from @init_rom to the beginning of the EEPROM memory buffer.
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*/
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I2CSlave *at24c_eeprom_init_rom(I2CBus *bus, uint8_t address, uint32_t rom_size,
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const uint8_t *init_rom, uint32_t init_rom_size);
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#endif
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