Hi,
From: U-Boot u-boot-bounces@lists.denx.de On Behalf Of Sughosh Ganu Sent: vendredi 13 décembre 2019 08:14
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: Patrick Delaunay patrick.delaunay@st.com
Thanks.
drivers/Kconfig | 2 ++ drivers/Makefile | 1 + drivers/rng/Kconfig | 7 +++++++ drivers/rng/Makefile | 6 ++++++ drivers/rng/rng-uclass.c | 23 +++++++++++++++++++++++ include/dm/uclass-id.h | 1 + include/rng.h | 30 ++++++++++++++++++++++++++++++ 7 files changed, 70 insertions(+) create mode 100644 drivers/rng/Kconfig create mode 100644 drivers/rng/Makefile create mode 100644 drivers/rng/rng- uclass.c create mode 100644 include/rng.h
diff --git a/drivers/Kconfig b/drivers/Kconfig index 9d99ce0..e34a227 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 e977f19..6c619b1 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -115,4 +115,5 @@ 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 0000000..dd44cc0 --- /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 toread the random seed from the device.diff --git a/drivers/rng/Makefile b/drivers/rng/Makefile new file mode 100644 index 0000000..311705b --- /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 0000000..b6af3b8 --- /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,
+}; diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 0c563d8..192202d 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -86,6 +86,7 @@ enum uclass_id { UCLASS_REGULATOR, /* Regulator device */ UCLASS_REMOTEPROC, /* Remote Processor device */ UCLASS_RESET, /* Reset controller device */
- UCLASS_RNG, /* Random Number Generator */ UCLASS_RTC, /* Real time clock device */ UCLASS_SCSI, /* SCSI device */ UCLASS_SERIAL, /* Serial UART */
diff --git a/include/rng.h b/include/rng.h new file mode 100644 index 0000000..61d5da9 --- /dev/null +++ b/include/rng.h @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0+ +/*
- Copyright (c) 2019, Linaro Limited
- */
+#if !defined _RNG_H_ +#define _RNG_H_
+#include <dm.h>
+/**
- dm_rng_read() - read a random number seed from the rng device
- @buffer: input buffer to put the read random seed into
- @size: number of bytes of random seed read
- */
+int dm_rng_read(struct udevice *dev, void *buffer, size_t size);
+/* struct dm_rng_ops - Operations for the hwrng uclass */ struct +dm_rng_ops {
- /**
* @read() - read a random number seed** @data: input buffer to read the random seed* @max: total number of bytes to read*/- int (*read)(struct udevice *dev, void *data, size_t max); };
+#endif /* _RNG_H_ */
2.7.4