[PATCH 2/3] efi_loader: make EFI_DT_FIXUP_PROTOCOL configurable

[Heinrich Schuchardt]

Allow EFI_DT_FIXUP_PROTOCOL to be disabled via configuration.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/Kconfig         | 8 ++++++++
 lib/efi_loader/efi_dt_fixup.c  | 7 +++----
 lib/efi_loader/efi_root_node.c | 2 +-
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/lib/efi_loader/Kconfig b/lib/efi_loader/Kconfig
index 106f789b4d..227cfa5ca4 100644
--- a/lib/efi_loader/Kconfig
+++ b/lib/efi_loader/Kconfig
@@ -208,6 +208,14 @@ config EFI_DEVICE_PATH_TO_TEXT
 	  The device path to text protocol converts device nodes and paths to
 	  human readable strings.

+config EFI_DT_FIXUP
+	bool "Device tree fixup protocol"
+	depends on !GENERATE_ACPI_TABLE
+	default y
+	help
+	  The EFI device-tree fix-up protocol provides a function to let the
+	  firmware apply fix-ups. This may be used by boot loaders.
+
 config EFI_LOADER_HII
 	bool "HII protocols"
 	default y
diff --git a/lib/efi_loader/efi_dt_fixup.c b/lib/efi_loader/efi_dt_fixup.c
index c2f2daef33..3850ab3b0f 100644
--- a/lib/efi_loader/efi_dt_fixup.c
+++ b/lib/efi_loader/efi_dt_fixup.c
@@ -104,10 +104,9 @@ void efi_carve_out_dt_rsv(void *fdt)
  * @flags:		bit field designating action to be performed
  * Return:		status code
  */
-static efi_status_t EFIAPI efi_dt_fixup(struct efi_dt_fixup_protocol *this,
-					void *dtb,
-					efi_uintn_t *buffer_size,
-					u32 flags)
+static efi_status_t __maybe_unused EFIAPI
+efi_dt_fixup(struct efi_dt_fixup_protocol *this, void *dtb,
+	     efi_uintn_t *buffer_size, u32 flags)
 {
 	efi_status_t ret;
 	size_t required_size;
diff --git a/lib/efi_loader/efi_root_node.c b/lib/efi_loader/efi_root_node.c
index b411a12cf6..8383fce943 100644
--- a/lib/efi_loader/efi_root_node.c
+++ b/lib/efi_loader/efi_root_node.c
@@ -61,7 +61,7 @@ efi_status_t efi_root_node_register(void)
 			 /* Device path utilities protocol */
 			 &efi_guid_device_path_utilities_protocol,
 			 (void *)&efi_device_path_utilities,
-#if !CONFIG_IS_ENABLED(GENERATE_ACPI_TABLE)
+#ifdef CONFIG_EFI_DT_FIXUP
 			 /* Device-tree fix-up protocol */
 			 &efi_guid_dt_fixup_protocol,
 			 (void *)&efi_dt_fixup_prot,
--
2.29.2