linux-kernel - Re: [PATCH v1] i2c: Force DLL0945 touchpad i2c freq to 100khz

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Message-ID: <aI_JDslnEsGEOz0W@shikoro>
Date: Sun, 3 Aug 2025 22:39:42 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: "fangzhong.zhou" <myth5@...h5.com>
Cc: linux-acpi@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org, westeri@...nel.org
Subject: Re: [PATCH v1] i2c: Force DLL0945 touchpad i2c freq to 100khz

On Sun, Aug 03, 2025 at 07:15:54AM +0800, fangzhong.zhou wrote:
> 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.
> 
> Changes in v1:
> 	- No code changes from first commit.

The "Changes" section should go below "---". I fixed it.

> 
> Signed-off-by: fangzhong.zhou <myth5@...h5.com>
> ---
>  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 d2499f302..5b424637b 100644
> --- a/drivers/i2c/i2c-core-acpi.c
> +++ b/drivers/i2c/i2c-core-acpi.c
> @@ -371,6 +371,7 @@ static const struct acpi_device_id i2c_acpi_force_100khz_device_ids[] = {
>  	 * a 400KHz frequency. The root cause of the issue is not known.
>  	 */
>  	{ "ELAN06FA", 0 },
> +	{ "DLL0945", 0 },

I moved it up to keep alphabetical sorting.

With these changes:

Applied to for-next (for 6.17 mergewindow), thanks!


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