[PATCH v3 08/10] ARM: i.MX: bbu: Allow plain i.MX v1 images as a special case

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If we are passed a plain i.MX v1 image without the usual 1K preamble -
assume a special case and don't try to apply bbu_force() logic.

This is useful in cases where a board specific quirk to make BBU work
is needed.

Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
---
 arch/arm/mach-imx/imx-bbu-internal.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-imx/imx-bbu-internal.c b/arch/arm/mach-imx/imx-bbu-internal.c
index 7735273b4..8c44d601d 100644
--- a/arch/arm/mach-imx/imx-bbu-internal.c
+++ b/arch/arm/mach-imx/imx-bbu-internal.c
@@ -133,9 +133,19 @@ err_close:
 
 static int imx_bbu_check_prereq(const char *devicefile, struct bbu_data *data)
 {
+	enum filetype type;
 	int ret;
 
-	if (file_detect_type(data->image, data->len) != filetype_arm_barebox) {
+	type = file_detect_type(data->image, data->len);
+
+	switch (type) {
+	case filetype_imx_image_v1:
+		pr_debug("Detected %s. Assuming special case\n",
+			 file_type_to_string(type));
+		break;
+	case filetype_arm_barebox:
+		break;
+	default:
 		if (!bbu_force(data, "Not an ARM barebox image"))
 			return -EINVAL;
 	}
-- 
2.17.1


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