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drivers: rng: add smccc trng driver

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Adds random number generator driver using Arm SMCCC TRNG interface to
get entropy bytes from secure monitor. The driver registers as an
Arm SMCCC feature driver to allow PSCI driver to bind a device for
when secure monitor exposes RNG support from Arm SMCCC TRNG interface.

Cc: Sughosh Ganu <sughosh.ganu@linaro.org>
Cc: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
This commit is contained in:
Etienne Carriere
2022-06-01 10:27:34 +02:00
committed by Tom Rini
parent 2fbe47b7e7
commit 53355bb86c
4 changed files with 222 additions and 0 deletions
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@@ -1278,6 +1278,11 @@ F: drivers/gpio/sl28cpld-gpio.c
F: drivers/misc/sl28cpld.c
F: drivers/watchdog/sl28cpld-wdt.c
SMCCC TRNG
M: Etienne Carriere <etienne.carriere@linaro.org>
S: Maintained
F: drivers/rng/smccc_trng.c
SPI
M: Jagan Teki <jagan@amarulasolutions.com>
S: Maintained