[0/4] hwrng: add support for i.MX6 rngb

Message

Horia Geanta June 19, 2020, 9:33 p.m. UTC

Add support for RNGB found in some i.MX6 SoCs (6SL, 6SLL, 6ULL, 6ULZ),
based on RNGC driver (drivers/char/hw_random/imx-rngc.c).

This driver claims support also for RNGB (besides RNGC),
and is currently used only by i.MX25.

Note:

All the i.MX6 SoCs with RNGB have a DCP (Data Co-Processor)
crypto accelerator.

Several NXP SoC from QorIQ family (P1010, P1023, P4080, P3041, P5020)
also have a RNGB, however it's part of the CAAM
(Cryptograhic Accelerator and Assurance Module) crypto accelerator.
In this case, RNGB is managed in the caam driver
(drivers/crypto/caam/), since it's tightly related to
the caam "job ring" interface.

Horia Geantă (4):
  ARM: dts: imx6sl: fix rng node
  ARM: dts: imx6sll: add rng
  ARM: dts: imx6ull: add rng
  hwrng: imx-rngc: enable driver for i.MX6

 arch/arm/boot/dts/imx6sl.dtsi  | 2 ++
 arch/arm/boot/dts/imx6sll.dtsi | 7 +++++++
 arch/arm/boot/dts/imx6ull.dtsi | 7 +++++++
 drivers/char/hw_random/Kconfig | 2 +-
 4 files changed, 17 insertions(+), 1 deletion(-)