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Diffstat (limited to 'cmd/rng.c')
-rw-r--r--cmd/rng.c23
1 files changed, 18 insertions, 5 deletions
diff --git a/cmd/rng.c b/cmd/rng.c
index 52f722c7af8..b073a6c8492 100644
--- a/cmd/rng.c
+++ b/cmd/rng.c
@@ -19,6 +19,22 @@ static int do_rng(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
struct udevice *dev;
int ret = CMD_RET_SUCCESS;
+ if (argc == 2 && !strcmp(argv[1], "list")) {
+ int idx = 0;
+
+ uclass_foreach_dev_probe(UCLASS_RNG, dev) {
+ idx++;
+ printf("RNG #%d - %s\n", dev->seq_, dev->name);
+ }
+
+ if (!idx) {
+ log_err("No RNG device\n");
+ return CMD_RET_FAILURE;
+ }
+
+ return CMD_RET_SUCCESS;
+ }
+
switch (argc) {
case 1:
devnum = 0;
@@ -56,12 +72,9 @@ static int do_rng(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
return ret;
}
-U_BOOT_LONGHELP(rng,
- "[dev [n]]\n"
- " - print n random bytes(max 64) read from dev\n");
-
U_BOOT_CMD(
rng, 3, 0, do_rng,
"print bytes from the hardware random number generator",
- rng_help_text
+ "list - list all the probed rng devices\n"
+ "rng [dev] [n] - print n random bytes(max 64) read from dev\n"
);