49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/* (C) 2019 by Harald Welte <laforge@osmocom.org>
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* All Rights Reserved
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <errno.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include "idt82v2081.h"
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#include "spi.h"
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/* Adaption layer between idt82 driver and no2fpga SPI */
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/* backend function for core idt82 driver */
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int idt82_reg_read(struct idt82 *idt, uint8_t reg)
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{
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uint8_t cmd = reg | 0x20;
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uint8_t rv;
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struct spi_xfer_chunk xfer[2] = {
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{ .data = (void *)&cmd, .len = 1, .read = false, .write = true, },
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{ .data = (void *)&rv, .len = 1, .read = true, .write = false, },
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};
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spi_xfer(SPI_CS_LIU(idt->cs), xfer, 2);
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return rv;
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}
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/* backend function for core idt82 driver */
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int idt82_reg_write(struct idt82 *idt, uint8_t reg, uint8_t val)
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{
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uint8_t cmd[2] = { reg, val };
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struct spi_xfer_chunk xfer[2] = {
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{ .data = (void *)cmd, .len = 2, .read = false, .write = true, },
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};
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spi_xfer(SPI_CS_LIU(idt->cs), xfer, 1);
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return 0;
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}
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