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Also update the help info. Reviewed-by: Heinrich Schuchardt Signed-off-by: Weizhao Ouyang Reviewed-by: Matthias Brugger Reviewed-by: Igor Opaniuk --- cmd/rng.c | 23 ++++++++++++++++++----- 1 file changed, 18 insertions(+), 5 deletions(-) diff --git a/cmd/rng.c b/cmd/rng.c index 52f722c7af..b073a6c849 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" );