From: fangzhong.zhou Date: Sat, 2 Aug 2025 23:15:54 +0000 (+0800) Subject: i2c: Force DLL0945 touchpad i2c freq to 100khz X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b7c9528facdb5a73ad78fea86d2e95a6c48dbc4;p=thirdparty%2Flinux.git 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 [wsa: kept sorting and removed unnecessary parts from commit msg] Signed-off-by: Wolfram Sang --- diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index 3445cc3b476be..ed90858a27b7b 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -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 }, {} };