[PATCH v11 2/7] firmware: hwrng: arm_smccc_trng: Register as an SMCCC device
Sudeep Holla
sudeep.holla at kernel.org
Thu Sep 24 05:23:45 PDT 2026
On Mon, Sep 14, 2026 at 11:35:06AM +0530, Aneesh Kumar K.V (Arm) wrote:
> The SMCCC TRNG interface is a firmware-provided SMCCC service rather than a
> standalone platform device. Now that the SMCCC core has an SMCCC bus,
> create an arm-smccc-trng device for the discovered TRNG service and convert
> the hwrng driver to an SMCCC driver.
>
> The SMCCC id table preserves module autoloading for systems where the TRNG
> driver is built as a module.
>
> The sysfs device path changes from the old smccc_trng platform-device path
> to an arm-smccc device path. No known userspace dependency on the old path
> was found; a Debian Code Search lookup for the existing platform-device
> name/path did not find any users.
>
> Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>
> Tested-by: Andre Przywara <andre.przywara at arm.com>
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar at kernel.org>
> ---
[...]
> drivers/firmware/smccc/smccc.c | 62 +++++++++++++++++++++----
Reviewed-by: Sudeep Holla <sudeep.holla at kernel.org>
--
Regards,
Sudeep
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