From: Russell King - ARM Linux <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
To: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Jaghathiswari Rankappagounder Natarajan
<jaghu-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
openbmc-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
mark.rutland-5wv7dgnIgG8@public.gmane.org,
gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org,
joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"linux-gpio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-gpio-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org
Subject: Re: [PATCH linux v1 4/4] arm: dts: Add dt-binding to support seven segment display on zaius
Date: Wed, 14 Dec 2016 11:06:35 +0000 [thread overview]
Message-ID: <20161214110635.GB14217@n2100.armlinux.org.uk> (raw)
In-Reply-To: <10697525.O7CkPN6Gfl@wuerfel>
On Wed, Dec 14, 2016 at 10:00:46AM +0100, Arnd Bergmann wrote:
> On Wednesday, December 14, 2016 9:55:47 AM CET Arnd Bergmann wrote:
> > According to your introductory mail, the interface is assumed to be
> > a 74HC164. Should we use that ID in the compatible string?
> >
> > We can always add other strings later if we want to support multiple
> > wire formats.
>
> Actually, looking up 74hc164, that seems to be a gpio expander,
> so maybe a more flexible way to do the same is to put a driver
> for the expander into drivers/gpio/ and have the main driver
> access the outputs of that using the gpiolib interface.
There already is - drivers/gpio/gpio-74x164.c
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next prev parent reply other threads:[~2016-12-14 11:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1481702104-8617-1-git-send-email-jaghu@google.com>
[not found] ` <1481702104-8617-5-git-send-email-jaghu@google.com>
[not found] ` <3917905.e4iOqADnVQ@wuerfel>
2016-12-14 9:00 ` [PATCH linux v1 4/4] arm: dts: Add dt-binding to support seven segment display on zaius Arnd Bergmann
2016-12-14 11:06 ` Russell King - ARM Linux [this message]
2016-12-14 11:40 ` Russell King - ARM Linux
2016-12-15 23:07 ` Linus Walleij
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