linux-kernel - Re: [PATCH 1/3] gpio: dt-bindings: add new property to wd,mbl-gpio bindings

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Fri, 27 Jan 2023 13:57:57 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     nl250060@....com
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] gpio: dt-bindings: add new property to wd,mbl-gpio bindings

Hi Niall,

thanks for your patch!

On Thu, Jan 26, 2023 at 11:18 AM Niall Leonard via B4 Submission
Endpoint <devnull+nl250060.ncr.com@...nel.org> wrote:

>  Optional properties:
>         - no-output: GPIOs are read-only.
> +       - no-input: GPIOs are write-only. Read is via a shadow register.

"Shadow register" is unclear technical lingo.

Just write "GPIO output registers are write-only"

DT bindings are OS neutral, the fact that Linux and other OS:es need to
cache ("shadow") this value is an implementation detail.

Yours,
Linus Walleij