linux-kernel - Re: [PATCH 2/3] hwrng: stm32 - add support for STM32 HW RNG

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Message-ID: <CACRpkdZgHv+1w2Toj-JBk6WA+1q-wU7BCuZi2b_QWB2kq3K=Ng@mail.gmail.com>
Date:	Wed, 14 Oct 2015 09:39:03 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Daniel Thompson <daniel.thompson@...aro.org>
Cc:	Matt Mackall <mpm@...enic.com>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Patch Tracking <patches@...aro.org>,
	Linaro Kernel Mailman List <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>
Subject: Re: [PATCH 2/3] hwrng: stm32 - add support for STM32 HW RNG

On Mon, Oct 12, 2015 at 10:21 AM, Daniel Thompson
<daniel.thompson@...aro.org> wrote:

> Add support for STMicroelectronics STM32 random number generator.
>
> The config value defaults to N, reflecting the fact that STM32 is a
> very low resource microcontroller platform and unlikely to be targeted
> by any "grown up" defconfigs.
>
> Signed-off-by: Daniel Thompson <daniel.thompson@...aro.org>

This is a fine driver, love the performance boost you reported
and stand corrected on the likeness of the other Nomadik driver.
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>

> +static int stm32_rng_read(struct hwrng *rng, void *data, size_t max, bool wait)

Now this read() function is so nice that I feel obliged to
go in and tidy up the Nomadik driver to be as nice.

Yours,
Linus Walleij
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