linux-kernel - Re: [PATCH 1/2] dt-bindings: GPIO: Add generic serializer binding

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

Date:	Tue, 22 Dec 2015 10:51:50 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	"Andrew F. Davis" <afd@...com>
Cc:	Rob Herring <robh+dt@...nel.org>,
	"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
	Mark Brown <broonie@...nel.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] dt-bindings: GPIO: Add generic serializer binding

On Tue, Dec 15, 2015 at 12:19 AM, Andrew F. Davis <afd@...com> wrote:
> [Rob]
>> I agree the generic version is fine (or find who made the first part
>> ;)). What "pisosr" is is not very obvious though. Having 74165 in the
>> compatible would make it somewhat more obvious it is a standard logic
>> part.
>>
>
> A quick search shows shift-registers being made from vacuum tubes for
> the Colossus! Those might work with this driver if you could match the
> voltage to an SPI bus... :)
>
> I agree about the name not being very good, but I'm not sure about
> 74165 ether as it is also just a single part number.

We can add many compatible strings so it's not an issue.
"ti,74165" works for me as TI invented the 74xx series.

> The idea was to
> have a non-part number compatible string for any shift-register you
> can hook to the SPI line.

Again, one does not exclude the other. I'm happy with a generic
compatible *and* "ti,74165".

> That way when we have boards with a sn65x882
> or something we wont have to call it a 74165. But I guess that's why
> it's a "compatible:" string, and not "is-a:" string.

Compatible ranges from the specific to the more generic
so compatible = "ti,74165", "pisosr"; is just fine. Something
will match if there is a suitable driver. The OS may choose to
provide something part-specific or something more generic.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/