--- /dev/null
+choice
+ prompt "select trng type "
+ help
+ select trng type
+config TRNG_CK
+ bool "csky trng"
+ help
+ select the ck trng driver
+
+config TRNG_ZX29
+ bool "zx29 trng"
+ help
+ select the zx29 trng driver
+
+config TRNG_XX
+ bool "example trng"
+ help
+ this option for test
+
+endchoice