[PATCH v2 0/5] arm: exynos: Enable TRNG for E850-96 board

[Sam Protsenko]

Hi Minkyu,

Can you please take a look at this series? And also my MMC series [1]
has been pending for a while now, if it's ok with you -- can you
please apply it?

Thanks!

[1] https://lists.denx.de/pipermail/u-boot/2024-July/559602.html

On Mon, Jul 15, 2024 at 10:17 PM Sam Protsenko
<semen.protsenko at linaro.org> wrote:
>
> This series enables True Random Number Generator (TRNG) for E850-96
> board. Here is a short breakdown of features implemented in this series:
>
>   1. Load LDFW (Loadable Firmware) on E850-96 board. It's needed to make
>      TRNG SMC commands functional. To do so, add the default eMMC
>      partition table and implement reading and applying LDFW in
>      board_init().
>   2. Add Exynos TRNG driver
>   3. Enable Exynos TRNG driver on E850-96 board. It requires SSS clocks
>      to be enabled, so add those clocks as well.
>
> With this series it's possible to generate random numbers in U-Boot
> (e.g. using 'rng' command). The main reason for RNG enablement on
> E850-96 board -- it's needed for EFI_RNG_PROTOCOL and kaslr, so it's one
> of the requirements to enable EFI boot support on E850-96 board, which
> in turn is needed (among other things) for EBBR spec and SystemReady IR
> certification. With this series it's also possible to use TRNG in Linux
> kernel (which was recently added, see [1] for details), as Linux kernel
> Exynos TRNG driver also relies on LDFW firmware to be loaded in the
> bootloader.
>
> Changes in v2:
>   - Addressed comments for [PATCH 4/5] rng: Add Exynos TRNG driver
>
> [1] https://lore.kernel.org/all/20240618003743.2975-1-semen.protsenko@linaro.org/T/#me6ba1762a254ca438a9715f011d32820babfe2d8
>
> Sam Protsenko (5):
>   board: samsung: e850-96: Add default partitions
>   board: samsung: e850-96: Load LDFW firmware on board init
>   clk: exynos: Add SSS clocks for Exynos850
>   rng: Add Exynos TRNG driver
>   arm: exynos: Enable TRNG on E850-96 board
>
>  arch/arm/dts/exynos850-e850-96-u-boot.dtsi |  11 +
>  arch/arm/mach-exynos/Kconfig               |   2 +
>  board/samsung/e850-96/Makefile             |   4 +-
>  board/samsung/e850-96/e850-96.c            |   6 +-
>  board/samsung/e850-96/e850-96.env          |  26 ++
>  board/samsung/e850-96/fw.c                 | 131 ++++++++++
>  board/samsung/e850-96/fw.h                 |  12 +
>  configs/e850-96_defconfig                  |   1 +
>  drivers/clk/exynos/clk-exynos850.c         |  10 +
>  drivers/rng/Kconfig                        |  13 +
>  drivers/rng/Makefile                       |   1 +
>  drivers/rng/exynos-trng.c                  | 291 +++++++++++++++++++++
>  12 files changed, 504 insertions(+), 4 deletions(-)
>  create mode 100644 board/samsung/e850-96/e850-96.env
>  create mode 100644 board/samsung/e850-96/fw.c
>  create mode 100644 board/samsung/e850-96/fw.h
>  create mode 100644 drivers/rng/exynos-trng.c
>
> --
> 2.39.2
>