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i2c: Force DLL0945 touchpad i2c freq to 100khz 

This patch fixes an issue where the touchpad cursor movement becomes
slow on the Dell Precision 5560. Force the touchpad freq to 100khz
as a workaround.

Tested on Dell Precision 5560 with 6.14 to 6.14.6. Cursor movement
is now smooth and responsive.

Signed-off-by: fangzhong.zhou <myth5@myth5.com>
[wsa: kept sorting and removed unnecessary parts from commit msg]
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This commit is contained in:
fangzhong.zhou 2025-08-03 07:15:54 +08:00 committed by Wolfram Sang
parent 65cf62cd62
commit 0b7c9528fa
1 changed files with 1 additions and 0 deletions
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1
drivers/i2c/i2c-core-acpi.c
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@ -370,6 +370,7 @@ static const struct acpi_device_id i2c_acpi_force_100khz_device_ids[] = {
* the device works without issues on Windows at what is expected to be
* a 400KHz frequency. The root cause of the issue is not known.
*/
{ "DLL0945", 0 },
{ "ELAN06FA", 0 },
{}
};