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| author | Sughosh Ganu <sughosh.ganu@linaro.org> | 2019-12-28 23:58:27 +0530 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2020-01-07 18:08:21 +0100 |
| commit | a2487684003b0bc380955e1a38cdd71da3ca4366 (patch) | |
| tree | 16f94d87badaeae9d2cd6cb5c9bb4050ba9a82af /drivers | |
| parent | 8391f955494efc0dbe136e1557e9606bbf55d046 (diff) | |
| download | u-boot-a2487684003b0bc380955e1a38cdd71da3ca4366.tar.gz u-boot-a2487684003b0bc380955e1a38cdd71da3ca4366.tar.xz u-boot-a2487684003b0bc380955e1a38cdd71da3ca4366.zip | |
dm: rng: Add random number generator(rng) uclass
Add a uclass for reading a random number seed from a random number
generator device.
Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/rng/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/rng/Makefile | 6 | ||||
| -rw-r--r-- | drivers/rng/rng-uclass.c | 23 |
5 files changed, 39 insertions, 0 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index 9d99ce0226..e34a22708c 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -90,6 +90,8 @@ source "drivers/remoteproc/Kconfig" source "drivers/reset/Kconfig" +source "drivers/rng/Kconfig" + source "drivers/rtc/Kconfig" source "drivers/scsi/Kconfig" diff --git a/drivers/Makefile b/drivers/Makefile index cb8c215e76..8eec4e8176 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -116,4 +116,5 @@ obj-$(CONFIG_W1_EEPROM) += w1-eeprom/ obj-$(CONFIG_MACH_PIC32) += ddr/microchip/ obj-$(CONFIG_DM_HWSPINLOCK) += hwspinlock/ +obj-$(CONFIG_DM_RNG) += rng/ endif diff --git a/drivers/rng/Kconfig b/drivers/rng/Kconfig new file mode 100644 index 0000000000..dd44cc0242 --- /dev/null +++ b/drivers/rng/Kconfig @@ -0,0 +1,7 @@ +config DM_RNG + bool "Driver support for Random Number Generator devices" + depends on DM + help + Enable driver model for random number generator(rng) devices. + This interface is used to initialise the rng device and to + read the random seed from the device. diff --git a/drivers/rng/Makefile b/drivers/rng/Makefile new file mode 100644 index 0000000000..311705b6e6 --- /dev/null +++ b/drivers/rng/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0+ +# +# Copyright (c) 2019, Linaro Limited +# + +obj-$(CONFIG_DM_RNG) += rng-uclass.o diff --git a/drivers/rng/rng-uclass.c b/drivers/rng/rng-uclass.c new file mode 100644 index 0000000000..b6af3b8606 --- /dev/null +++ b/drivers/rng/rng-uclass.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2019, Linaro Limited + */ + +#include <common.h> +#include <dm.h> +#include <rng.h> + +int dm_rng_read(struct udevice *dev, void *buffer, size_t size) +{ + const struct dm_rng_ops *ops = device_get_ops(dev); + + if (!ops->read) + return -ENOSYS; + + return ops->read(dev, buffer, size); +} + +UCLASS_DRIVER(rng) = { + .name = "rng", + .id = UCLASS_RNG, +}; |