[PATCH 1/1] rng: detect RISC-V Zkr RNG device in bind method

[Simon Glass]

Hi Heinrich,

On Sat, 4 Nov 2023 at 06:51, Heinrich Schuchardt
<heinrich.schuchardt at canonical.com> wrote:
>
> The existence of devices should be checked in the bind method and not in
> the probe method. Adjust the RISC-V Zkr RNG driver accordingly.
>
> Use ENOENT (and not ENODEV) to signal that the device is not available.
>
> Fixes: ceec977ba1a9 ("rng: Provide a RNG based on the RISC-V Zkr ISA extension")
> Reported-by: Andre Przywara <andre.przywara at arm.com>
> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> ---
>  drivers/rng/riscv_zkr_rng.c | 34 ++++++++++++++++++++++++++--------
>  1 file changed, 26 insertions(+), 8 deletions(-)

This device should be in the DT, so you have some control over which
RNG is used.

Regards,
Simon