41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
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/*
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* Copyright (C) 2018 Marvell International Ltd.
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* Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>
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*
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* SPDX-License-Identifier: BSD-3-Clause
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* https://spdx.org/licenses
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*/
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/* This driver provides support for Mentor Graphics MI2CV IP core */
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#ifndef MI2CV_H
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#define MI2CV_H
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#include <stdint.h>
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/*
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* Initialization, must be called once on start up, may be called
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* repeatedly to change the speed and slave addresses.
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*/
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void i2c_init(void *i2c_base);
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/*
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* Read/Write interface:
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* chip: I2C chip address, range 0..127
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* addr: Memory (register) address within the chip
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* alen: Number of bytes to use for addr (typically 1, 2 for larger
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* memories, 0 for register type devices with only one
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* register)
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* buffer: Where to read/write the data
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* len: How many bytes to read/write
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*
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* Returns: 0 on success, not 0 on failure
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*/
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int i2c_read(uint8_t chip,
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unsigned int addr, int alen, uint8_t *buffer, int len);
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int i2c_write(uint8_t chip,
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unsigned int addr, int alen, uint8_t *buffer, int len);
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#endif /* MI2CV_H */
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