From: Oleksij Rempel <ore@pengutronix.de>
To: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
Alexandre Courbot <gnurou@gmail.com>,
"linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Oleksij Rempel <o.rempel@pengutronix.de>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
barebox@lists.infradead.org
Subject: Re: [PATCH v1 1/1] gpio: of: provide option generic property for initial line states
Date: Sun, 11 Jun 2017 08:19:19 +0200 [thread overview]
Message-ID: <20170611061919.jsbc7x67ut4segj5@pengutronix.de> (raw)
In-Reply-To: <CAL_JsqJeSCN88JnVnofb2Ncy4bDyXiKQbLniHmvbE4j854ZePA@mail.gmail.com>
Hi Rob,
On Fri, Jun 09, 2017 at 10:41:30AM -0500, Rob Herring wrote:
> On Fri, Jun 9, 2017 at 9:16 AM, Oleksij Rempel <o.rempel@pengutronix.de> wrote:
> > This property is needed for barebox or may be other bootloaders
> > to set proper gpio configuration as early as possible.
> >
> > This example is mainly based on "lines-initial-states" property
> > from this binding documentation:
> > Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt
>
> Don't we have a binding for this already based on gpio-hogs.
Markus Pargmann was working on this topic before and suddenly was not
able to finish it.
I found only some not finished discussions and no code or documentation
in linux kernel upstream.
So far, I was able to find fallowing patches and discussions:
patch 23.08.2015, last comment 11.05.2017:
https://patchwork.kernel.org/patch/7096721/
patch 23.02.2016, last comment 09.03.2016:
https://patchwork.ozlabs.org/patch/586743/
Since there was objections about node-like design for gpio-initval, I
provided an array property, which is similar to initval properties already used
for different other device nodes. For example:
Documentation/devicetree/bindings/net/wireless/qcom,ath10k.txt
qcom,ath10k-calibration-data
Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt
lines-initial-states
Please fixme if I miss something.
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next prev parent reply other threads:[~2017-06-11 6:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-09 14:16 Oleksij Rempel
2017-06-09 15:41 ` Rob Herring
2017-06-11 6:19 ` Oleksij Rempel [this message]
2017-06-11 19:57 ` Vladimir Zapolskiy
2017-06-15 5:56 ` Oleksij Rempel
2017-06-15 9:48 ` Vladimir Zapolskiy
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