diff --git a/ChangeLog b/ChangeLog
index 0bf01ec..2c28f9b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-04-16  Mao Han  <han_mao@c-sky.com>
+
+	* config.sub (csky, csky-*): Recognise.
+	* testsuite/config-sub.data: Add a test case.
+
 2018-04-16  Ben Elliston  <bje@gnu.org>
 
 	* testsuite/config-sub.data: Sort.
diff --git a/config.sub b/config.sub
index c2bc81e..657a862 100755
--- a/config.sub
+++ b/config.sub
@@ -254,7 +254,7 @@ case $basic_machine in
 	| ba \
 	| be32 | be64 \
 	| bfin \
-	| c4x | c8051 | clipper \
+	| c4x | c8051 | clipper | csky \
 	| d10v | d30v | dlx | dsp16xx \
 	| e2k | epiphany \
 	| fido | fr30 | frv | ft32 \
@@ -382,7 +382,7 @@ case $basic_machine in
 	| be32-* | be64-* \
 	| bfin-* | bs2000-* \
 	| c[123]* | c30-* | [cjt]90-* | c4x-* \
-	| c8051-* | clipper-* | craynv-* | cydra-* \
+	| c8051-* | clipper-* | craynv-* | csky-* | cydra-* \
 	| d10v-* | d30v-* | dlx-* \
 	| e2k-* | elxsi-* \
 	| f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index bc7c833..474dce8 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -119,6 +119,7 @@ cr16-elf					cr16-unknown-elf
 cr16-random-elf					cr16-unknown-elf
 cris-linux					cris-axis-linux-gnu
 crisv32-linux					crisv32-axis-linux-gnu
+csky-linux					csky-unknown-linux-gnu
 d10v						d10v-unknown-none
 d30v						d30v-unknown-none
 dicos						i686-pc-dicos