linux-kernel - [PATCH v3 0/3] hwrng: stm32 - add support for STM32 HW RNG

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Date:	Wed, 14 Oct 2015 16:55:22 +0100
From:	Daniel Thompson <daniel.thompson@...aro.org>
To:	Matt Mackall <mpm@...enic.com>,
	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Daniel Thompson <daniel.thompson@...aro.org>,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
	patches@...aro.org, linaro-kernel@...ts.linaro.org,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH v3 0/3] hwrng: stm32 - add support for STM32 HW RNG

This patchset introduces a driver for the STM32 hardware random number
generator.

Herbert: I have assumed the v2 version is *so* badly broken (sorry
         again for that) that you would probably choose to remove v2
	 completely and replace it with v3. In a moment I will also
	 post a patch to fix the build without ripping out v2. Choose
	 whichever suits you best.

v3:

 * Fixed build with CONFIG_PM (Fengguang Wu). Runtime tested as normal
   and also build tested on stm32 (which has CONFIG_PM set) and on
   x86/COMPILE_TEST with and without CONFIG_PM.

v2:

 * Moved binding docs from .../hwrng/ to .../rng/ and renamed to match
   convention in new directory (Rob Herring).
 * Adopted runtime PM and auto-suspend instead of managing the clocks
   from the read function (Linus Walleij). Increased bandwidth by ~30%.
 * Simplified error detection in main read loop (Linus Walleij, Maxime
   Coquelin).
 * Only WARN_ONCE() when hardware failure mechanisms trigger (Maxime
   Coquelin).
 * Simplify end of probe function after cocci warning (Fengguang Wu).
 * Switch to devm_hwrng_register.


Daniel Thompson (3):
  dt-bindings: Document the STM32 HW RNG bindings
  hwrng: stm32 - add support for STM32 HW RNG
  ARM: dts: stm32f429: Adopt STM32 RNG driver

 .../devicetree/bindings/rng/st,stm32-rng.txt       |  21 +++
 arch/arm/boot/dts/stm32f429.dtsi                   |   7 +
 drivers/char/hw_random/Kconfig                     |  12 ++
 drivers/char/hw_random/Makefile                    |   1 +
 drivers/char/hw_random/stm32-rng.c                 | 202 +++++++++++++++++++++
 5 files changed, 243 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/rng/st,stm32-rng.txt
 create mode 100644 drivers/char/hw_random/stm32-rng.c

--
2.4.3

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