linux-kernel - Re: [PATCH] gpio: stmpe: Add DT support for stmpe gpio

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Message-ID: <CACRpkdZ03EuT4yGd_5utdTjGiokYubbPgTQuZwdcT+5oranrEg@mail.gmail.com>
Date:	Sat, 1 Dec 2012 20:55:13 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Shiraz Hashim <shiraz.hashim@...com>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	grant.likely@...retlab.ca, devicetree-discuss@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, spear-devel@...t.st.com,
	Vipul Kumar Samar <vipulkumar.samar@...com>,
	Rabin VINCENT <rabin.vincent@...ricsson.com>
Subject: Re: [PATCH] gpio: stmpe: Add DT support for stmpe gpio

On Sat, Dec 1, 2012 at 8:34 PM, Linus Walleij <linus.walleij@...aro.org> wrote:

> The crucial question is: can the STMPE controllers be
> used for GPIO, PWM, keypad and touchscreen at the
> *same time* or are they nailed to *one* usecase during
> electronics design?

Looking closer at the datasheet it seems to mux pins on individual per-pin
basis, so it is indeed pin-controller-like.

Was this driver submitted today, I would probably request that the
pinctrl + GPIO properties be properly exposed in the pinctrl
subsystem instead.

Yours,
Linus Walleij
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