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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2025 Köry Maincent <[email protected]>
*/
#include <alist.h>
#include <command.h>
#include <env.h>
#include <extension_board.h>
#include <fdt_support.h>
#include <malloc.h>
#include <mapmem.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/uclass.h>
struct alist *extension_get_list(void)
{
struct udevice *dev;
if (uclass_first_device_err(UCLASS_EXTENSION, &dev))
return NULL;
return dev_get_priv(dev);
}
int extension_probe(struct udevice *dev)
{
struct alist *extension_list = dev_get_priv(dev);
alist_init_struct(extension_list, struct extension);
return 0;
}
int extension_remove(struct udevice *dev)
{
struct alist *extension_list = dev_get_priv(dev);
alist_uninit(extension_list);
return 0;
}
int extension_scan(void)
{
struct alist *extension_list = extension_get_list();
const struct extension_ops *ops;
struct udevice *dev;
int ret;
ret = uclass_first_device_err(UCLASS_EXTENSION, &dev);
if (ret)
return ret;
if (!extension_list)
return -ENODEV;
ops = extension_get_ops(dev);
alist_empty(extension_list);
return ops->scan(dev, extension_list);
}
int extension_apply(struct fdt_header *working_fdt, ulong size)
{
struct fdt_header *blob;
ulong overlay_addr;
int ret;
overlay_addr = env_get_hex("extension_overlay_addr", 0);
if (!overlay_addr) {
printf("Environment extension_overlay_addr is missing\n");
return -EINVAL;
}
fdt_shrink_to_minimum(working_fdt, size);
blob = map_sysmem(overlay_addr, 0);
if (!fdt_valid(&blob)) {
printf("Invalid overlay devicetree\n");
return -EINVAL;
}
/* Apply method prints messages on error */
ret = fdt_overlay_apply_verbose(working_fdt, blob);
if (ret)
printf("Failed to apply overlay\n");
return ret;
}
UCLASS_DRIVER(extension) = {
.name = "extension",
.id = UCLASS_EXTENSION,
};
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