linux-kernel - Re: [PATCH] input: stmpe-ts: Add DT support for stmpe touchscreen

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Date:	Fri, 23 Nov 2012 16:49:31 +0530
From:	Viresh Kumar <viresh.kumar@...aro.org>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	dmitry.torokhov@...il.com, linux-input@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	spear-devel@...t.st.com,
	Vipul Kumar Samar <vipulkumar.samar@...com>
Subject: Re: [PATCH] input: stmpe-ts: Add DT support for stmpe touchscreen

On 23 November 2012 16:16, Lee Jones <lee.jones@...aro.org> wrote:
>> +++ b/Documentation/devicetree/bindings/input/touchscreen/stmpe.txt
>> @@ -0,0 +1,43 @@
>> +STMPE Touchscreen
>> +----------------
>> +
>> +Required properties:
>> + - compatible: "st,stmpe-ts"
>
> You shouldn't be specifying a compatible string in the DT.
>
>> +Example:
>> +
>> +     stmpe_touchscreen {
>> +             compatible = "st,stmpe-ts";
>
> This needs to be removed.

Copying my earlier reply from stmpe-gpio patch for others to know
what i have to say on this :)

I believe these are required by the code you wrote in mfd-core.c

        if (parent->of_node && cell->of_compatible) {
                for_each_child_of_node(parent->of_node, np) {
                        if (of_device_is_compatible(np, cell->of_compatible)) {
                                pdev->dev.of_node = np;
                                break;
                        }
                }
        }

This matches compatible of child node with compatible of cell. And that's
why you have added that in your keypad mappings as well.

--
viresh
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