boot: Remove legacy extension board support

Remove the legacy extension board implementation now that all boards
have been converted to use the new UCLASS-based framework. This
eliminates lines of legacy code while preserving functionality
through the modern driver model approach.

Update the bootstd tests, due to the removal of extension hunter.

Signed-off-by: Kory Maincent (TI.com) <[email protected]>

4 files changed, 10 insertions, 114 deletions

diff --git a/boot/Kconfig b/boot/Kconfig
index 08d666d4b93..a75f6b641ed 100644
--- a/boot/Kconfig
+++ b/boot/Kconfig
@@ -1910,10 +1910,6 @@ config SUPPORT_EXTENSION_SCAN
 	select OF_LIBFDT_OVERLAY
         bool
 
-config SUPPORT_DM_EXTENSION_SCAN
-	select OF_LIBFDT_OVERLAY
-        bool
-
 config USE_BOOTARGS
 	bool "Enable boot arguments"
 	help
diff --git a/boot/Makefile b/boot/Makefile
index aa26070fbb8..7fb56e7ef37 100644
--- a/boot/Makefile
+++ b/boot/Makefile
@@ -9,8 +9,7 @@ obj-$(CONFIG_BOOT_RETRY) += bootretry.o
 obj-$(CONFIG_CMD_BOOTM) += bootm.o bootm_os.o
 obj-$(CONFIG_CMD_BOOTZ) += bootm.o bootm_os.o
 obj-$(CONFIG_CMD_BOOTI) += bootm.o bootm_os.o
-obj-$(CONFIG_SUPPORT_EXTENSION_SCAN) += extension.o
-obj-$(CONFIG_SUPPORT_DM_EXTENSION_SCAN) += extension-uclass.o
+obj-$(CONFIG_SUPPORT_EXTENSION_SCAN) += extension-uclass.o
 
 obj-$(CONFIG_PXE_UTILS) += pxe_utils.o
 
diff --git a/boot/extension-uclass.c b/boot/extension-uclass.c
index 914971215af..35f751237eb 100644
--- a/boot/extension-uclass.c
+++ b/boot/extension-uclass.c
@@ -14,7 +14,7 @@
 #include <dm/lists.h>
 #include <dm/uclass.h>
 
-struct alist *dm_extension_get_list(void)
+struct alist *extension_get_list(void)
 {
 	struct udevice *dev;
 
@@ -24,7 +24,7 @@ struct alist *dm_extension_get_list(void)
 	return dev_get_priv(dev);
 }
 
-int dm_extension_probe(struct udevice *dev)
+int extension_probe(struct udevice *dev)
 {
 	struct alist *extension_list = dev_get_priv(dev);
 
@@ -32,7 +32,7 @@ int dm_extension_probe(struct udevice *dev)
 	return 0;
 }
 
-int dm_extension_remove(struct udevice *dev)
+int extension_remove(struct udevice *dev)
 {
 	struct alist *extension_list = dev_get_priv(dev);
 
@@ -40,9 +40,9 @@ int dm_extension_remove(struct udevice *dev)
 	return 0;
 }
 
-int dm_extension_scan(void)
+int extension_scan(void)
 {
-	struct alist *extension_list = dm_extension_get_list();
+	struct alist *extension_list = extension_get_list();
 	const struct extension_ops *ops;
 	struct udevice *dev;
 	int ret;
@@ -109,9 +109,9 @@ static int _extension_apply(const struct extension *extension)
 	return ret;
 }
 
-int dm_extension_apply(int extension_num)
+int extension_apply(int extension_num)
 {
-	struct alist *extension_list = dm_extension_get_list();
+	struct alist *extension_list = extension_get_list();
 	const struct extension *extension;
 
 	if (!extension_list)
@@ -127,9 +127,9 @@ int dm_extension_apply(int extension_num)
 	return _extension_apply(extension);
 }
 
-int dm_extension_apply_all(void)
+int extension_apply_all(void)
 {
-	struct alist *extension_list = dm_extension_get_list();
+	struct alist *extension_list = extension_get_list();
 	const struct extension *extension;
 	int ret;
 
diff --git a/boot/extension.c b/boot/extension.c
deleted file mode 100644
index 8f28a7e1626..00000000000
--- a/boot/extension.c
+++ /dev/null
@@ -1,99 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * (C) Copyright 2025 Köry Maincent <[email protected]>
- */
-
-#include <bootdev.h>
-#include <command.h>
-#include <env.h>
-#include <extension_board.h>
-#include <fdt_support.h>
-#include <malloc.h>
-#include <mapmem.h>
-
-LIST_HEAD(extension_list);
-
-int extension_apply(struct extension *extension)
-{
-	ulong extrasize, overlay_addr;
-	struct fdt_header *blob;
-	char *overlay_cmd;
-
-	if (!working_fdt) {
-		printf("No FDT memory address configured. Please configure\n"
-		       "the FDT address via \"fdt addr <address>\" command.\n");
-		return CMD_RET_FAILURE;
-	}
-
-	overlay_cmd = env_get("extension_overlay_cmd");
-	if (!overlay_cmd) {
-		printf("Environment extension_overlay_cmd is missing\n");
-		return CMD_RET_FAILURE;
-	}
-
-	overlay_addr = env_get_hex("extension_overlay_addr", 0);
-	if (!overlay_addr) {
-		printf("Environment extension_overlay_addr is missing\n");
-		return CMD_RET_FAILURE;
-	}
-
-	env_set("extension_overlay_name", extension->overlay);
-	if (run_command(overlay_cmd, 0) != 0)
-		return CMD_RET_FAILURE;
-
-	extrasize = env_get_hex("filesize", 0);
-	if (!extrasize)
-		return CMD_RET_FAILURE;
-
-	fdt_shrink_to_minimum(working_fdt, extrasize);
-
-	blob = map_sysmem(overlay_addr, 0);
-	if (!fdt_valid(&blob))
-		return CMD_RET_FAILURE;
-
-	/* apply method prints messages on error */
-	if (fdt_overlay_apply_verbose(working_fdt, blob))
-		return CMD_RET_FAILURE;
-
-	return CMD_RET_SUCCESS;
-}
-
-int extension_scan(bool show)
-{
-	struct extension *extension, *next;
-	int extension_num;
-
-	list_for_each_entry_safe(extension, next, &extension_list, list) {
-		list_del(&extension->list);
-		free(extension);
-	}
-	extension_num = extension_board_scan(&extension_list);
-	if (show && extension_num >= 0)
-		printf("Found %d extension board(s).\n", extension_num);
-
-	/* either the number of extensions, or -ve for error */
-	return extension_num;
-}
-
-static int extension_bootdev_hunt(struct bootdev_hunter *info, bool show)
-{
-	int ret;
-
-	ret = env_set_hex("extension_overlay_addr",
-			  env_get_hex("fdtoverlay_addr_r", 0));
-	if (ret)
-		return log_msg_ret("env", ret);
-
-	ret = extension_scan(show);
-	if (ret < 0)
-		return log_msg_ret("ext", ret);
-
-	return 0;
-}
-
-/* extensions should have a uclass - for now we use UCLASS_SIMPLE_BUS uclass */
-BOOTDEV_HUNTER(extension_bootdev_hunter) = {
-	.prio		= BOOTDEVP_1_PRE_SCAN,
-	.uclass		= UCLASS_SIMPLE_BUS,
-	.hunt		= extension_bootdev_hunt,
-};