mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 05:42:58 +00:00
0efc02499f
This allows us to put the SPI flash chip inside the SPI interface node, with U-Boot finding the correct bus and chip select automatically. Signed-off-by: Simon Glass <sjg@chromium.org>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
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 <fdtdec.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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#ifdef CONFIG_OF_SPI
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struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
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int node)
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{
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int cs, max_hz, mode = 0;
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cs = fdtdec_get_int(blob, node, "reg", -1);
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max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000);
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if (fdtdec_get_bool(blob, node, "spi-cpol"))
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mode |= SPI_CPOL;
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if (fdtdec_get_bool(blob, node, "spi-cpha"))
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mode |= SPI_CPHA;
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if (fdtdec_get_bool(blob, node, "spi-cs-high"))
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mode |= SPI_CS_HIGH;
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return spi_setup_slave(busnum, cs, max_hz, mode);
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}
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#endif
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