From d039c6d80a7eeb774d40d17e0a568e0d00891a32 Mon Sep 17 00:00:00 2001 From: "fangzhong.zhou" Date: Sun, 3 Aug 2025 07:15:54 +0800 Subject: [PATCH] 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 --- drivers/i2c/i2c-core-acpi.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index d2499f302b508..f43067f6797e9 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 }, {} }; -- 2.47.3