Hi Dmitry,
Sorry later for reply. If touchpad is designed for Window OS,
the firmware will support standard HID mouse format (non-driver) and elan raw data format (with driver).
So, if user change OS from Window to Linux, touchpad will work fine under HID format.
----------------------------------------------
Thanks,
ELAN Duson
✉ Email: dusonlin@xxxxxxxxxx
----------------------------------------------
> Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> 於 2015年4月4日 上午5:05 寫道：
>
> On Tue, Mar 31, 2015 at 05:34:58PM -0400, Benjamin Tissoires wrote:
>> ELAN0600 seems to work just fine in mouse emulation mode through i2c-hid,
>> but to have full raw touch support we need to register it in elan_i2c.ko
>>
>> Found on a Lenovo Yoga 3 11".
>>
>> Reported-and-tested-by: Alessio Treglia <alessio@xxxxxxxxxx>
>> Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
>> ---
>>
>> Hi,
>>
>> Alessio reported this touchpad on the Lenovo Yoga 3. I must say that I am
>> rather surprised that we need a cross tree support to enable this panel
>> and I would expect that the driver would be in the HID subtree, not a direct
>> input device.
>>
>> I understand the driver needs to access to the raw I2C commands, but still,
>> we could have worked around in the HID tree directly.
>> Not to mention that the DT binding would have required only i2c-hid, not a
>> custom vendor.
>>
>> Anyway, Jiri, Dmitry, who wants to take this one?
>
> Hmm, so elan_i2c.ko (and elants_i2c) is intended to be used with devices
> that are not compatible with HID protocol, as far as I know. I guess
> there are firmwares that can do both, but then we should default to HID.
>
> Duson, any comments?
>
> Thanks!
>
>>
>> Cheers,
>> Benjamin
>>
>> drivers/hid/hid-core.c | 1 +
>> drivers/input/mouse/elan_i2c_core.c | 1 +
>> 2 files changed, 2 insertions(+)
>>
>> diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
>> index 722a925..33a22f4 100644
>> --- a/drivers/hid/hid-core.c
>> +++ b/drivers/hid/hid-core.c
>> @@ -2259,6 +2259,7 @@ static const struct hid_device_id hid_ignore_list[] = {
>> { HID_USB_DEVICE(USB_VENDOR_ID_DELORME, USB_DEVICE_ID_DELORME_EM_LT20) },
>> { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x0004) },
>> { HID_USB_DEVICE(USB_VENDOR_ID_DREAM_CHEEKY, 0x000a) },
>> + { HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, 0x0400) },
>> { HID_USB_DEVICE(USB_VENDOR_ID_ESSENTIAL_REALITY, USB_DEVICE_ID_ESSENTIAL_REALITY_P5) },
>> { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC5UH) },
>> { HID_USB_DEVICE(USB_VENDOR_ID_ETT, USB_DEVICE_ID_TC4UM) },
>> diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
>> index 375d98f..ced9a9c 100644
>> --- a/drivers/input/mouse/elan_i2c_core.c
>> +++ b/drivers/input/mouse/elan_i2c_core.c
>> @@ -1110,6 +1110,7 @@ MODULE_DEVICE_TABLE(i2c, elan_id);
>> #ifdef CONFIG_ACPI
>> static const struct acpi_device_id elan_acpi_id[] = {
>> { "ELAN0000", 0 },
>> + { "ELAN0600", 0 },
>> { }
>> };
>> MODULE_DEVICE_TABLE(acpi, elan_acpi_id);
>> --
>> 2.3.4
>>
>
> --
> Dmitry
>
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