[PATCH v12 2/7] firmware: hwrng: arm_smccc_trng: Register as an SMCCC device
Catalin Marinas
catalin.marinas at arm.com
Mon Sep 21 01:45:30 PDT 2026
On Mon, Sep 21, 2026 at 11:08:02AM +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: Catalin Marinas <catalin.marinas at arm.com>
> Reviewed-by: Jonathan Cameron <jonathan.cameron at oss.qualcomm.com>
> 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>
> ---
> arch/arm/include/asm/archrandom.h | 2 +-
> arch/arm64/include/asm/archrandom.h | 2 +-
> drivers/char/hw_random/arm_smccc_trng.c | 32 ++++++++-----
> drivers/firmware/smccc/smccc.c | 62 +++++++++++++++++++++----
> 4 files changed, 76 insertions(+), 22 deletions(-)
I asked you two times already to cc the hw_random maintainers. Not
adding them again but not merging this stuff without their ack either.
So, up to you.
--
Catalin
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