linux-kernel - Re: [PATCH V2 2/2] mfd: stmpe: Extend DT support in stmpe driver

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Date:	Fri, 23 Nov 2012 09:39:31 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	sameo@...ux.intel.com, devicetree-discuss@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org, spear-devel@...t.st.com,
	Vipul Kumar Samar <vipulkumar.samar@...com>
Subject: Re: [PATCH V2 2/2] mfd: stmpe: Extend DT support in stmpe driver

On Fri, 23 Nov 2012, Viresh Kumar wrote:

> On 22 November 2012 16:54, Lee Jones <lee.jones@...aro.org> wrote:
> >> diff --git a/Documentation/devicetree/bindings/mfd/stmpe.txt b/Documentation/devicetree/bindings/mfd/stmpe.txt
> >> +Optional properties:
> >> +- irq-trigger: IRQ trigger to use for the interrupt to the host
> >> +- irq-invert-polarity: bool, IRQ line is connected with reversed polarity
> >
> > Are these new?
> >
> > When adding new bindings, ask yourself:
> 
> I was trying to get information of these two bindings from other sources,
> but couldn't find. The only other place can be the interrupts field, right?

Bingo. Continue along this thread.

> Because interrupts field depends on the interrupt controller, which can
> be a wide variety of controllers in our case, we can't use that. Also,
> the cells of interrupts field will have something that is required to be
> programmed in the interrupt controller and not in the user of IC.
> 
> But here we are talking about programming stmpe and so these bindings
> are very much required in stmpe only.

Not true.

Hint: `git grep triggered -- Documentation/devicetree/`

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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