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https://github.com/brain-hackers/u-boot-brain
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5753d09b10
Current implementation only supports 8 bit word lengths, even though omap3 can handle anything between 4 and 32. Update the spi interface to support changing the SPI word length, and implement it in omap3_spi driver to support the full range of possible word lengths. This implementation is backwards compatible by defaulting to the old behavior of 8 bit word lengths. Also, it required a change to the omap3_spi non static I/O functions, but since they are not used anywhere else, no collateral changes are required. Cc: Tom Rini <trini@ti.com> Cc: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> Cc: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
40 lines
696 B
C
40 lines
696 B
C
/*
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* Copyright (c) 2011 The Chromium OS Authors.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <malloc.h>
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#include <spi.h>
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int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
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{
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if (wordlen == 0 || wordlen > 32) {
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printf("spi: invalid wordlen %d\n", wordlen);
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return -1;
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}
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slave->wordlen = wordlen;
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return 0;
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}
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void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
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unsigned int cs)
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{
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struct spi_slave *slave;
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void *ptr;
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ptr = malloc(size);
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if (ptr) {
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memset(ptr, '\0', size);
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slave = (struct spi_slave *)(ptr + offset);
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slave->bus = bus;
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slave->cs = cs;
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slave->wordlen = SPI_DEFAULT_WORDLEN;
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}
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return ptr;
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}
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