mirror of
https://github.com/brain-hackers/u-boot-brain
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4c2dbefde5
Add a driver model uclass for SPI flash which supports the common operations (read, write, erase). Since we must keep support for the non-dm interface, some modification of the spi_flash header is required. CONFIG_DM_SPI_FLASH is used to enable driver model for SPI flash. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
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* Copyright (c) 2014 Google, Inc
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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 <dm.h>
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#include <spi.h>
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#include <spi_flash.h>
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#include <dm/device-internal.h>
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#include "sf_internal.h"
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/*
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* TODO(sjg@chromium.org): This is an old-style function. We should remove
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* it when all SPI flash drivers use dm
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*/
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struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode)
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{
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struct udevice *dev;
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if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
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return NULL;
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return dev->uclass_priv;
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}
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void spi_flash_free(struct spi_flash *flash)
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{
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spi_flash_remove(flash->spi->dev);
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}
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int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode,
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struct udevice **devp)
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{
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struct spi_slave *slave;
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struct udevice *bus;
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char name[20], *str;
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int ret;
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snprintf(name, sizeof(name), "%d:%d", busnum, cs);
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str = strdup(name);
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ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
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"spi_flash_std", str, &bus, &slave);
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if (ret)
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return ret;
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*devp = slave->dev;
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return 0;
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}
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int spi_flash_remove(struct udevice *dev)
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{
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return device_remove(dev);
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}
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UCLASS_DRIVER(spi_flash) = {
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.id = UCLASS_SPI_FLASH,
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.name = "spi_flash",
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.per_device_auto_alloc_size = sizeof(struct spi_flash),
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};
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