linux-kernel - Re: [PATCH] gpio: 74x164: add dt support for nxp's 74x594

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Message-ID: <20160322104207.GA2842@marie-Aspire-5600>
Date:	Tue, 22 Mar 2016 11:42:08 +0100
From:	nicolas saenz julienne <nicolassaenzj@...il.com>
To:	Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	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] gpio: 74x164: add dt support for nxp's 74x594

Hi sorry for the late response but I was on vacation.
> 
> Why did you choose the "lvc" variant?
Well to be honest the HW people did and it's all I could test with.  I don't
know much about these naming schemes, apart from the intuition it has to do
with frequency and line levels.

> Ideally, you want to put the oldest "manuf,74x594" variant here.
What do you mean by oldest? What would you suggest? it's funny because the chip
is going to be used on a new product that is meant to be produced for years.

> I once read it was Motorola who invented the 7459x parts, to interface with
> SPI.
> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
Thanks for your comments!
	Nicolas