From: Linus Walleij <linus.walleij@linaro.org>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Linux ARM <linux-arm-kernel@lists.infradead.org>,
Imre Kaloz <kaloz@openwrt.org>,
Krzysztof Halasa <khalasa@piap.pl>,
OpenWrt Development List <openwrt-devel@lists.openwrt.org>
Subject: Re: [PATCH] RFC: ARM: dts: Proposed Goramo MultiLink device tree
Date: Wed, 11 Aug 2021 11:08:12 +0200 [thread overview]
Message-ID: <CACRpkdZ8gtXt1gbJb+sZRgWORsk6wu6j7fsZ1_qy=SyvYhOj=w@mail.gmail.com> (raw)
In-Reply-To: <CAMuHMdWRHSiZH_Xz9tVUaK19TMkUtnTv06etp9Zi-yfhYxSVwQ@mail.gmail.com>
On Thu, Jul 29, 2021 at 2:16 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
> Hi Linus,
(...)
> Can't the existing drivers/gpio/gpio-74x164.c be used?
> See also Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml
Sadly no. The way this device is used for GPIO is very
different. The former used a version of SPI and this has
to hammer GPIO lines directly, and has to use a special
strobe signal to propagate values out to pins.
Yours,
Linus Walleij
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prev parent reply other threads:[~2021-08-11 9:35 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 23:45 [PATCH] RFC: ARM: dts: Proposed Goramo MultiLink device tree Linus Walleij
2021-07-29 5:25 ` Krzysztof Hałasa
2021-07-29 11:31 ` Linus Walleij
2021-07-30 5:26 ` Krzysztof Hałasa
2021-07-29 12:16 ` Geert Uytterhoeven
2021-08-11 9:08 ` Linus Walleij [this message]
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