linux-kernel - Re: [PATCH V2] platform-driver-x86: ACPI EC Extra driver for Oaktrail

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Message-ID: <20110110071013.GJ30215@kai-debian>
Date:	Mon, 10 Jan 2011 15:10:13 +0800
From:	Yin Kangkai <kangkai.yin@...ux.intel.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	platform-driver-x86 <platform-driver-x86@...r.kernel.org>,
	linux-kernel@...r.kernel.org,
	"Wang, Yong Y" <yong.y.wang@...el.com>,
	"Liu, Bing Wei" <bing.wei.liu@...el.com>,
	Corentin Chary <corentin.chary@...il.com>
Subject: Re: [PATCH V2] platform-driver-x86: ACPI EC Extra driver for
 Oaktrail

On 2011-01-07, 22:09 +0000, Matthew Garrett wrote:
> On Fri, Jan 07, 2011 at 03:41:15PM +0800, Yin Kangkai wrote:
> 
> > This driver implements an Extra ACPI EC driver for products based on Intel
> > Oaktrail platform.  It is programming the EC space, through existing ACPI EC
> > driver, to provide user space layer the sysfs and rfkill interfaces to
> > enable/disable the Camera, Bluetooth, GPS, WiFi, 3G, and to show the status of
> > Touchscreen.
> 
> As far as I can tell, the only ACPI aspect of this driver is that it 
> makes use of the ACPI EC driver? In that case I think the name's 
> misleading.

OK, am rename the driver "EC Extra driver...", 

> > @@ -0,0 +1,13 @@
> > +What:		/sys/devices/platform/intel_oaktrail/camera
> > +Date:		Jan 2011
> > +KernelVersion:	2.6.37
> > +Contact:	"Yin Kangkai" <kangkai.yin@...el.com>
> > +Description:
> > +		Control the camera. 1 means on, 0 means off.
> 
> We really need a better approach for this kind of thing...
> 
> > +What:		/sys/devices/platform/intel_oaktrail/touchscreen
> > +Date:		Jan 2011
> > +KernelVersion:	2.6.37
> > +Contact:	"Yin Kangkai" <kangkai.yin@...el.com>
> > +Description:
> > +		Show the status of the touch screen. 1 means on, 0 means off.
> 
> And this one, but we don't have one yet so I think this is ok.
> 
> > +	wwan_rfkill = oaktrail_rfkill_new("oaktrail-wwan",
> > +					  RFKILL_TYPE_WWAN,
> > +					  OT_EC_WWAN_MASK);
> 
> Do you have any way to identify whether the hardware has all these 
> features before registering?

AFAIK, no, sorry.

> > +static struct dmi_system_id __initdata oaktrail_dmi_table[] = {
> > +	{
> > +		.ident = "OakTrail platform",
> > +		.matches = {
> > +			DMI_MATCH(DMI_PRODUCT_NAME, "OakTrail platform"),
> > +		},
> > +		.callback = dmi_check_cb
> > +	},
> > +	{ }
> > +};
> 
> Is any hardware actually going to ship with this identifier, or will 
> vendors change the string?


I think vendors and OEMs will change this string. But we can add the
DMI_BOARD_NAME, DMI_BOARD_VERSION, etc. back later, can we?

Thanks.

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