spl: lz4: Allow use of lz4 compression in SPL

In some cases U-Boot is compressed and it is useful to be able to
decompress it in SPL. Add a Kconfig and Makefile change to allow this.
Note that this does not actually implement decompression.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/lib/Kconfig b/lib/Kconfig
index 847e797..0333ab1 100644 (file)
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -301,6 +301,14 @@ config LZO
        help
          This enables support for LZO compression algorithm.r
 
+config SPL_LZ4
+       bool "Enable LZ4 decompression support in SPL"
+       help
+         This enables support for tge LZ4 decompression algorithm in SPL. LZ4
+         is a lossless data compression algorithm that is focused on
+         fast compression and decompression speed. It belongs to the LZ77
+         family of byte-oriented compression schemes.
+
 config SPL_LZO
        bool "Enable LZO decompression support in SPL"
        help

diff --git a/lib/Makefile b/lib/Makefile
index fb69441..4d2e220 100644 (file)
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -38,7 +38,6 @@ obj-$(CONFIG_IMAGE_SPARSE) += image-sparse.o
 obj-y += initcall.o
 obj-$(CONFIG_LMB) += lmb.o
 obj-y += ldiv.o
-obj-$(CONFIG_LZ4) += lz4_wrapper.o
 obj-$(CONFIG_MD5) += md5.o
 obj-y += net_utils.o
 obj-$(CONFIG_PHYSMEM) += physmem.o
@@ -64,6 +63,7 @@ obj-$(CONFIG_SHA256) += sha256.o
 obj-$(CONFIG_$(SPL_)ZLIB) += zlib/
 obj-$(CONFIG_$(SPL_)GZIP) += gunzip.o
 obj-$(CONFIG_$(SPL_)LZO) += lzo/
+obj-$(CONFIG_$(SPL_)LZ4) += lz4_wrapper.o
 
 obj-$(CONFIG_LIBAVB) += libavb/