Add a random number generator(rng) uclass to facilitate adding drivers for rng devices. I plan to add an implementation of the EFI_RNG_PROTOCOL, which would get the random number from the rng uclass -- the protocol would be used by the efi stub for getting a random number for the kaslr feature.
The patch series also adds a driver for the rng device found on the stm32mp1 and qemu platforms. A dummy rng driver for sandbox has also been added, along with the unit test for the rng uclass.
Changes since V3: * Handle review comments from Patrick Delaunay
Changes since V2: * Add a driver for the virtio-rng device on qemu platform
Changes since V1: * Add a SPDX header in rng.h * Change the UCLASS_DRIVER name from hwrng to rng, consistent with the rest of the naming convention * Handle review comment from Patrice Chotard
Sughosh Ganu (8): dm: rng: Add random number generator(rng) uclass clk: stm32mp1: Add a clock entry for RNG1 device stm32mp1: rng: Add a driver for random number generator(rng) device configs: stm32mp15: Enable random number generator(rng) device sandbox: rng: Add a random number generator(rng) driver configs: sandbox: Enable random number generator(rng) device test: rng: Add basic test for random number generator(rng) uclass virtio: rng: Add a random number generator(rng) driver
arch/sandbox/dts/test.dts | 4 + configs/sandbox64_defconfig | 2 + configs/sandbox_defconfig | 2 + configs/stm32mp15_basic_defconfig | 2 + configs/stm32mp15_optee_defconfig | 2 + configs/stm32mp15_trusted_defconfig | 2 + drivers/Kconfig | 2 + drivers/Makefile | 1 + drivers/clk/clk_stm32mp1.c | 1 + drivers/rng/Kconfig | 21 +++++ drivers/rng/Makefile | 8 ++ drivers/rng/rng-uclass.c | 23 ++++++ drivers/rng/sandbox_rng.c | 39 +++++++++ drivers/rng/stm32mp1_rng.c | 157 ++++++++++++++++++++++++++++++++++++ drivers/virtio/Kconfig | 6 ++ drivers/virtio/Makefile | 1 + drivers/virtio/virtio-uclass.c | 1 + drivers/virtio/virtio_rng.c | 72 +++++++++++++++++ include/dm/uclass-id.h | 1 + include/rng.h | 32 ++++++++ include/virtio.h | 4 +- test/dm/Makefile | 1 + test/dm/rng.c | 28 +++++++ 23 files changed, 411 insertions(+), 1 deletion(-) create mode 100644 drivers/rng/Kconfig create mode 100644 drivers/rng/Makefile create mode 100644 drivers/rng/rng-uclass.c create mode 100644 drivers/rng/sandbox_rng.c create mode 100644 drivers/rng/stm32mp1_rng.c create mode 100644 drivers/virtio/virtio_rng.c create mode 100644 include/rng.h create mode 100644 test/dm/rng.c