Hi Tom,

I read Microsoft's things about HID over I2C few days ago. And from
what I understood, the report descriptors and the enumeration of the
devices are stored in the ACPI table and not in the device itself. Can
you confirm this?

I was thinking about making hid-multitouch independent from the usb
stack and was thinking about doing the i2c-hid bridge. However, I did
not start writing a line yet ;-)

Cheers,
Benjamin

On Thu, Apr 12, 2012 at 03:37, 林彥佑 [off-list ref] wrote:

Hi Dmitry


On 04/12/2012 12:25 AM, Dmitry Torokhov wrote:

quoted

On Wednesday, April 11, 2012 06:09:03 PM 林彥佑 wrote:

quoted

Hi Daniel

On 04/11/2012 03:12 PM, Dmitry Torokhov wrote:

quoted

Hi Tom,

On Tue, Apr 10, 2012 at 08:42:46PM +0800, Tom Lin wrote:

quoted

This patch adds driver for Elan I2C touchpad. These protocol of HID-I2C
was
defined by Microsoft. The kernel driver would use the multi-touch
protocol
format B.

If this device truly supports HID protocol shouldn't we define i2c-hid
transport, similar to usbhid?

I merely follow defined by Microsoft.
It was called "HID OVER I2C" by Microsoft.

(http://msdn.microsoft.com/en-us/library/windows/hardware/hh825917(v=vs.85).
aspx) But I agree to change from hid i2c to i2chid.
Do you have any better opinions?

I am not sure we are talking about same thing... I do not really care
whether it is named "hid i2c" or "i2chid". What I meant if the device
really speaks HID protocol, except that the transport is not USB or
bluetooth but I2C, then instead of writing a custom driver for this
particular part we need to add a new HID transport into
drivers/hid/i2c-hid that is similar to drivers/hid/usbhid/ and reuse the
rest of HID framework along with hid- multitouch.c which handles
HID-compliant multitouch devices.

I am CCing Jiri (HID maintainer) for additional input.

Sorry! I misunderstood what you mean.
I fully agree with your suggestion. The I2CHID device will be more and more
in the future. Need the new i2chid-driver that would cover all hid-compliant
i2c-devices.
Thank you

Tom-

quoted

Thanks.

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