linux-kernel - Re: [PATCH v2 0/3] hw_random: introduce Arm CryptoCell TRNG driver

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Message-ID: <CAK8P3a3C7hfCQwupKQqtnOmwu7faoeKH9fcEZFQW3WmrScKzUw@mail.gmail.com>
Date:   Mon, 3 Feb 2020 10:54:48 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Hadar Gat <hadar.gat@....com>
Cc:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Tomer Maimon <tmaimon77@...il.com>,
        Stefan Wahren <wahrenst@....net>,
        Sumit Garg <sumit.garg@...aro.org>,
        Zaibo Xu <xuzaibo@...wei.com>,
        Weili Qian <qianweili@...wei.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>, DTML <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Gilad Ben-Yossef <gilad@...yossef.com>,
        Ofir Drang <ofir.drang@....com>
Subject: Re: [PATCH v2 0/3] hw_random: introduce Arm CryptoCell TRNG driver

On Sun, Feb 2, 2020 at 2:27 PM Hadar Gat <hadar.gat@....com> wrote:
>
> The Arm CryptoCell is a hardware security engine.
> This patch introduces driver for its TRNG (True Random Number Generator)
> engine.
>
> Changes from previous veriosn: fixed 'make dt_bnding_check' errors.
>
> Hadar Gat (3):
>   dt-bindings: add device tree binding for Arm CryptoCell trng engine
>   hw_random: cctrng: introduce Arm CryptoCell driver
>   MAINTAINERS: add HG as cctrng maintainer

I looked at the patches briefly and everything makes sense to me,

Acked-by: Arnd Bergmann <arnd@...db.de>

There are two style issues that you could improve:

- The header is only included from a single file, so I would just fold
  its contents into the driver itself.

- You have a lot of "#ifdef CONFIG_PM" that are easy to get wrong
  with various combinations of config symbols. It's often better to
  leave that all compiled unconditionally and have the logic in
  UNIVERSAL_DEV_PM_OPS() take care of dropping the unused
  bits, with a __maybe_unused annotation on functions that cause
  a warning otherwise.

       Arnd