From: Stephen Warren <swarren@nvidia.com>
To: Tony Lindgren <tony@atomide.com>, Simon Glass <sjg@chromium.org>
Cc: Dong Aisheng-B29396 <B29396@freescale.com>,
"Linus Walleij (linus.walleij@linaro.org)"
<linus.walleij@linaro.org>,
"Sascha Hauer (s.hauer@pengutronix.de)" <s.hauer@pengutronix.de>,
"rob.herring@calxeda.com" <rob.herring@calxeda.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
"cjb@laptop.org" <cjb@laptop.org>,
Dong Aisheng <dongas86@gmail.com>,
"Shawn Guo (shawn.guo@linaro.org)" <shawn.guo@linaro.org>,
Thomas Abraham <thomas.abraham@linaro.org>,
"Grant Likely (grant.likely@secretlab.ca)"
<grant.likely@secretlab.ca>,
"devicetree-discuss@lists.ozlabs.org"
<devicetree-discuss@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: RE: Pinmux bindings proposal V2
Date: Fri, 27 Jan 2012 09:38:47 -0800 [thread overview]
Message-ID: <74CDBE0F657A3D45AFBB94109FB122FF178E123E59@HQMAIL01.nvidia.com> (raw)
In-Reply-To: <20120127022111.GK29812@atomide.com>
Tony Lindgren wrote at Thursday, January 26, 2012 7:21 PM:
> * Simon Glass <sjg@chromium.org> [120126 09:11]:
> >
> > On Fri, Jan 20, 2012 at 2:22 PM, Stephen Warren <swarren@nvidia.com> wrote:
> >
> > 1. It doesn't seem to make full use of the device tree format. For example,
> >
> > <TEGRA_PMX_PG_DTD TEGRA_PMX_CONF_DRIVE_STRENGTH 5>
> >
> > would be better as something like
> >
> > drive-strength = <5>;
> >
> > if we could arrange it. It also reduces the need for these
> > TEGRA_PMX_CONF_DRIVE_STRENGTH defines.
>
> I agree. This is something that most pinmux/pinconf drivers need to
> implement, so it's best done in a generic way.
Yet:
* Some controllers don't have a "drive strength" property
* Others have a single "drive strength" property
* Others configure drive strength separately for driving a signal high
or low.
Hence, representing this in a generic fashion doesn't seem possible to
me, except through (key, value) pairs where the individual drivers or
bindings define what the keys are.
--
nvpublic
next prev parent reply other threads:[~2012-01-27 17:39 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-20 22:22 Pinmux bindings proposal V2 Stephen Warren
2012-01-23 21:00 ` Tony Lindgren
2012-01-23 23:08 ` Stephen Warren
2012-01-24 1:20 ` Tony Lindgren
2012-01-24 22:29 ` Stephen Warren
2012-01-25 0:04 ` Tony Lindgren
2012-01-26 19:33 ` Stephen Warren
2012-01-27 2:08 ` Tony Lindgren
2012-01-27 6:57 ` Shawn Guo
2012-01-27 17:05 ` Tony Lindgren
2012-01-30 1:56 ` Shawn Guo
2012-01-30 17:20 ` Tony Lindgren
2012-01-31 1:32 ` Shawn Guo
2012-01-31 2:29 ` Tony Lindgren
2012-02-01 5:36 ` Shawn Guo
2012-01-27 17:36 ` Stephen Warren
2012-01-27 17:42 ` Tony Lindgren
2012-01-26 9:36 ` Shawn Guo
2012-01-26 17:51 ` Tony Lindgren
2012-01-27 7:19 ` Shawn Guo
2012-01-27 17:16 ` Tony Lindgren
2012-01-30 2:10 ` Shawn Guo
2012-01-30 17:43 ` Tony Lindgren
2012-01-31 1:07 ` Shawn Guo
2012-01-26 9:24 ` Shawn Guo
2012-01-26 17:42 ` Simon Glass
2012-01-27 2:21 ` Tony Lindgren
2012-01-27 15:43 ` Simon Glass
2012-01-27 17:37 ` Tony Lindgren
2012-01-27 17:51 ` Stephen Warren
2012-01-27 18:10 ` Tony Lindgren
2012-01-30 3:27 ` Shawn Guo
2012-01-30 3:13 ` Shawn Guo
2012-01-30 17:49 ` Tony Lindgren
2012-01-27 17:38 ` Stephen Warren [this message]
2012-01-27 17:29 ` Stephen Warren
2012-01-30 2:31 ` Shawn Guo
2012-02-01 14:35 ` Shawn Guo
2012-02-02 18:36 ` Stephen Warren
2012-02-02 20:07 ` Dong Aisheng
2012-02-03 14:02 ` Shawn Guo
2012-02-03 17:21 ` Dong Aisheng
2012-02-03 17:32 ` Tony Lindgren
2012-02-03 18:13 ` Dong Aisheng
2012-02-03 21:05 ` Tony Lindgren
2012-02-04 16:55 ` Dong Aisheng
2012-02-04 17:15 ` Tony Lindgren
2012-02-03 8:46 ` Shawn Guo
2012-02-13 19:58 ` Stephen Warren
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