mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-25 12:33:41 +00:00
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>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/*
|
|
* Copyright (c) 2014 Google, Inc
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <dm.h>
|
|
#include <spi.h>
|
|
#include <spi_flash.h>
|
|
#include <dm/device-internal.h>
|
|
#include "sf_internal.h"
|
|
|
|
/*
|
|
* TODO(sjg@chromium.org): This is an old-style function. We should remove
|
|
* it when all SPI flash drivers use dm
|
|
*/
|
|
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int spi_mode)
|
|
{
|
|
struct udevice *dev;
|
|
|
|
if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
|
|
return NULL;
|
|
|
|
return dev->uclass_priv;
|
|
}
|
|
|
|
void spi_flash_free(struct spi_flash *flash)
|
|
{
|
|
spi_flash_remove(flash->spi->dev);
|
|
}
|
|
|
|
int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
|
|
unsigned int max_hz, unsigned int spi_mode,
|
|
struct udevice **devp)
|
|
{
|
|
struct spi_slave *slave;
|
|
struct udevice *bus;
|
|
char name[20], *str;
|
|
int ret;
|
|
|
|
snprintf(name, sizeof(name), "%d:%d", busnum, cs);
|
|
str = strdup(name);
|
|
ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
|
|
"spi_flash_std", str, &bus, &slave);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*devp = slave->dev;
|
|
return 0;
|
|
}
|
|
|
|
int spi_flash_remove(struct udevice *dev)
|
|
{
|
|
return device_remove(dev);
|
|
}
|
|
|
|
UCLASS_DRIVER(spi_flash) = {
|
|
.id = UCLASS_SPI_FLASH,
|
|
.name = "spi_flash",
|
|
.per_device_auto_alloc_size = sizeof(struct spi_flash),
|
|
};
|