linux-kernel - Re: [PATCH 5/5] Input: Add ChromeOS EC keyboard driver

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Date:	Thu, 10 Jan 2013 17:51:33 -0800
From:	Simon Glass <sjg@...omium.org>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Luigi Semenzato <semenzato@...omium.org>,
	Vincent Palatin <vpalatin@...omium.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>,
	Sourav Poddar <sourav.poddar@...com>,
	Felipe Balbi <balbi@...com>, Olof Johansson <olof@...om.net>,
	Roland Stigge <stigge@...com.de>,
	Wolfram Sang <w.sang@...gutronix.de>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-input@...r.kernel.org" <linux-input@...r.kernel.org>
Subject: Re: [PATCH 5/5] Input: Add ChromeOS EC keyboard driver

Hi Grant,

On Wed, Dec 19, 2012 at 12:42 PM, Grant Likely
<grant.likely@...retlab.ca> wrote:
> On Wed, Dec 19, 2012 at 8:20 PM, Simon Glass <sjg@...omium.org> wrote:
>> On Wed, Dec 19, 2012 at 10:16 AM, Dmitry Torokhov
>> <dmitry.torokhov@...il.com> wrote:
>>>
>>> On Wed, Dec 19, 2012 at 12:57:22PM +0000, Grant Likely wrote:
>>> > On Fri, 14 Dec 2012 17:43:31 -0800, Dmitry Torokhov
>>> > <dmitry.torokhov@...il.com> wrote:
>>> > > On Saturday, December 15, 2012 01:13:45 AM Grant Likely wrote:
>>> > > > > +Required properties:
>>> > > > > +- compatible: "google,cros-ec-keyb"
>>> > > > > +- google,key-rows: Number of keyboard rows (must be <= 8)
>>> > > > > +- google,key-columns: Number of keyboard columns (must be <= 13)
>>> > > > > +- google,repeat-delay-ms: Key repeat delay in milliseconds
>>> > > > > +- google,repeat-rate-ms: Key repeat rate in milliseconds
>>> > > >
>>> > > > Hmmm, these should probably be in a common binding. Take a look at
>>> > > > the other input bindings and make a proposal for properties to add
>>> > > > to
>>> > > > matrix-keymap.txt.
>>> > >
>>> > > Actually these are not essentia for bringup and can be set from
>>> > > userspace,
>>> > > so I'd say simply drop them.
>>> >
>>> > Aren't they needed for a working keyboard? If so, I would really think
>>> > they should be set correctly without userspace intervention.
>>>
>>> I am sorry if I was unclear, but I was actually talking about the last
>>> 2: repeat-delay-ms and repeat-rate-ms. Input core has I believe sane
>>> defaults (250 msec delay, 33 cps autorepeat) and user can adjust if
>>> other rate is preferred.
>>
>>
>> I seems like I should remove these two, then.
>>
>> It would be nice if we could keep these parameters so that the keyboard
>> doesn't require user-space set up to work, but I understand and agree they
>> are not essential. Regarding Grant's request to come up with a common
>> binding, if I remove these then that is not needed, right?
>
> I have no problem keeping the properties, but it does look like
> something applicable to all users, not just this driver.

I dropped keyboard repeat from the common binding and resent. If that
goes in then I can try again later when Dmitry is on holiday :-), or I
can put it just in our own driver. I don't mind either way, so someone
should let me know which is best.

>
> g.

Regards,
Simon
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