From mboxrd@z Thu Jan 1 00:00:00 1970 From: Patrick DELAUNAY Date: Mon, 16 Dec 2019 11:59:15 +0000 Subject: [PATCH v3 1/8] dm: rng: Add random number generator(rng) uclass In-Reply-To: <1576221267-5948-2-git-send-email-sughosh.ganu@linaro.org> References: <1576221267-5948-1-git-send-email-sughosh.ganu@linaro.org> <1576221267-5948-2-git-send-email-sughosh.ganu@linaro.org> Message-ID: List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: u-boot@lists.denx.de Hi, > From: U-Boot On Behalf Of Sughosh Ganu > Sent: vendredi 13 d=C3=A9cembre 2019 08:14 >=20 > Add a uclass for reading a random number seed from a random number genera= tor > device. >=20 > Signed-off-by: Sughosh Ganu > Reviewed-by: Patrice Chotard Reviewed-by: Patrick Delaunay 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 >=20 > diff --git a/drivers/Kconfig b/drivers/Kconfig index 9d99ce0..e34a227 100= 644 > --- a/drivers/Kconfig > +++ b/drivers/Kconfig > @@ -90,6 +90,8 @@ source "drivers/remoteproc/Kconfig" >=20 > source "drivers/reset/Kconfig" >=20 > +source "drivers/rng/Kconfig" > + > source "drivers/rtc/Kconfig" >=20 > source "drivers/scsi/Kconfig" > diff --git a/drivers/Makefile b/drivers/Makefile index e977f19..6c619b1 1= 00644 > --- a/drivers/Makefile > +++ b/drivers/Makefile > @@ -115,4 +115,5 @@ obj-$(CONFIG_W1_EEPROM) +=3D w1-eeprom/ >=20 > obj-$(CONFIG_MACH_PIC32) +=3D ddr/microchip/ > obj-$(CONFIG_DM_HWSPINLOCK) +=3D hwspinlock/ > +obj-$(CONFIG_DM_RNG) +=3D rng/ > endif > diff --git a/drivers/rng/Kconfig b/drivers/rng/Kconfig new file mode 1006= 44 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 to > + read the random seed from the device. > diff --git a/drivers/rng/Makefile b/drivers/rng/Makefile new file mode 10= 0644 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) +=3D 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 > +#include > +#include > + > +int dm_rng_read(struct udevice *dev, void *buffer, size_t size) { > + const struct dm_rng_ops *ops =3D device_get_ops(dev); > + > + if (!ops->read) > + return -ENOSYS; > + > + return ops->read(dev, buffer, size); > +} > + > +UCLASS_DRIVER(rng) =3D { > + .name =3D "rng", > + .id =3D 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_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