From: fangzhong.zhou Date: Sat, 2 Aug 2025 23:15:54 +0000 (+0800) Subject: i2c: Force DLL0945 touchpad i2c freq to 100khz X-Git-Tag: v5.10.241~205 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=24b4af05d56769434cef190aa2191c91224f40f4;p=thirdparty%2Fkernel%2Fstable.git i2c: Force DLL0945 touchpad i2c freq to 100khz [ Upstream commit 0b7c9528facdb5a73ad78fea86d2e95a6c48dbc4 ] 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 Signed-off-by: Sasha Levin --- diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index e7aed9442d56d..197b89f0b3e09 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -314,6 +314,7 @@ 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 }, {} };