linux-kernel - Re: [PATCH] gpio: 74x164: add lines-initial-states property

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <1f8d8cd0-000a-ea46-2776-caee79ca6e01@david-bauer.net>
Date:   Mon, 20 Aug 2018 01:55:03 +0200
From:   David Bauer <mail@...id-bauer.net>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] gpio: 74x164: add lines-initial-states property

Hi Linus,

On 8/16/18 10:11 AM, Linus Walleij wrote:
> This sounds like something that should be generic, and not use
> a bitmask, but offsets. It should work even if the number of
> GPIOs from the chip is > 32.
> 
> Is the usecase different from hogs?
> See Documentation/devicetree/bindings/gpio.txt

Thanks for pointing that out. Indeed for my use-case (Asserting single
output to be high on driver probe) hogs are are sufficient solution.

Best wishes
David