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| author | Weizhao Ouyang <o451686892@gmail.com> | 2024-03-04 14:42:42 +0000 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2024-03-13 12:40:43 -0400 |
| commit | 9a6e975c7c41f2fb67d7ef11fceb28942a4a4b4c (patch) | |
| tree | 9626634b80e030412801805f913668405c91fa2e | |
| parent | 1da4d327d49bb068bdc69974e0dee1391dfb30e6 (diff) | |
cmd: rng: Add rng list command
The 'rng list' command probes all RNG devices and list those devices
that are successfully probed. Also update the help info.
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Weizhao Ouyang <o451686892@gmail.com>
| -rw-r--r-- | cmd/rng.c | 23 | ||||
| -rw-r--r-- | doc/usage/cmd/rng.rst | 14 |
2 files changed, 28 insertions, 9 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" ); diff --git a/doc/usage/cmd/rng.rst b/doc/usage/cmd/rng.rst index 274e4d88df3..4a61e33d272 100644 --- a/doc/usage/cmd/rng.rst +++ b/doc/usage/cmd/rng.rst @@ -11,16 +11,22 @@ Synopsis :: - rng [devnum [n]] + rng list + rng [dev] [n] -Description ------------ +rng list +-------- + +List all the probed rng devices. + +rng [dev] [n] +------------- The *rng* command reads the random number generator(RNG) device and prints the random bytes read on the console. A maximum of 64 bytes can be read in one invocation of the command. -devnum +dev The RNG device from which the random bytes are to be read. Defaults to 0. |