linux-kernel - Re: [PATCHv6 1/3] Input: twl4030-pwrbutton

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Message-Id: <FAB6821F-08A8-40F9-B6A9-A1AFBD928043@codeaurora.org>
Date:	Mon, 28 Oct 2013 01:31:28 -0500
From:	Kumar Gala <galak@...eaurora.org>
To:	Sebastian Reichel <sre@...ian.org>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Peter Ujfalusi <peter.ujfalusi@...com>,
	Sachin Kamat <sachin.kamat@...aro.org>,
	Florian Vaussard <florian.vaussard@...l.ch>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCHv6 1/3] Input: twl4030-pwrbutton - add device tree support


On Oct 26, 2013, at 6:31 AM, Sebastian Reichel wrote:

> On Sat, Oct 26, 2013 at 01:37:57AM -0500, Kumar Gala wrote:
>> 
>> On Oct 25, 2013, at 5:18 PM, Sebastian Reichel wrote:
>> 
>>> On Fri, Oct 25, 2013 at 04:41:20PM -0500, Kumar Gala wrote:
>>>> On Oct 24, 2013, at 9:48 AM, Sebastian Reichel wrote:
>>>>> +- interrupt: should be one of the following
>>>>> +   - <8>: For controllers compatible with twl4030
>>>> 
>>>> Just checking, but the interrupt is always 8 for this device?
>>> 
>>> Yes. It's currently hardcoded in drivers/mfd/twl-core.c.
>> 
>> The fact that is hard coded in the driver does not imply that it
>> should be in the device tree binding.  Is there an interrupt
>> controller as part of the TWL4030?
> 
> Hardware looks like this:
> 
> &twl4030 {
>    compatible = "ti,twl4030";
> 	interrupt-controller;
> 	#interrupt-cells = <1>;
> 
>    twl_pwrbutton: pwrbutton {
> 		compatible = "ti,twl4030-pwrbutton";
> 		interrupts = <8>; /* 8th interrupt from the twl4030 */
> 	};
> };
> 
> Simplified the initialization of twl4030 stuff works
> like this for non DT boot:
> 
> twl4030_init(...) {
>    init_subdev(...);
>    init_subdev("twl4030-pwrbutton", ..., irq=8, ...);
>    init_subdev(...);
> };
> 
> -- Sebastian

ok, than other than Grant's comment about merging some of this together with the other twl4030 bindings, ack.

- k

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation

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