From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F273D35206B; Tue, 26 Aug 2025 13:54:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216453; cv=none; b=pfe108MVBeuXlFNkFsqxtLzbXYrZ0MN37QwieFEtaH4p1NUS3iQ8JggN2Sen4u98GpTpfJX3yzIiA/567r9kfKPxB8EZCAyjCjomSnrLX3WWxL5xmm8G+14zb9NhJzvagTyBJEUMdWxwriQM2udf9+tE0cHeDwCYzNtAQwcbP98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756216453; c=relaxed/simple; bh=iSpNi5nCW5319nOtwsw3UQX6rUGo/LA0kRoLxk+przE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VPgzj1R6zXC4Qn7LWCcdrgEawXJ418CId+h/C/1e3m7RXRTm7arcRCW+nRpfwnwrUu0i21TV4Khss6hrti3hkAwtMBfuASN/Q9ekWUeH8VepBzax4xlSLCxesv7Z96Qli6WYIzVkw/VmPoXWPudIHMapgevNhcQ4x1cd2bzF3o4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JH9FEgHw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="JH9FEgHw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84D3AC4CEF1; Tue, 26 Aug 2025 13:54:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756216452; bh=iSpNi5nCW5319nOtwsw3UQX6rUGo/LA0kRoLxk+przE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JH9FEgHwxftLX1AZF6ga1zVpEYuUm8lw8WtYuAFAUG127ygTLQPxbqOICEE0iai4w xbh3TgwfdlSzqdnutZqqmCineVgafesV47DnrMLCb49sgQazZGB64sEz0XuTAyyok2 ZC6rm5Bu7k2/1pgLBQ/sy+WylJ3YdqV5W+aeDO6M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "fangzhong.zhou" , Wolfram Sang , Sasha Levin Subject: [PATCH 5.15 417/644] i2c: Force DLL0945 touchpad i2c freq to 100khz Date: Tue, 26 Aug 2025 13:08:28 +0200 Message-ID: <20250826110956.791602535@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110946.507083938@linuxfoundation.org> References: <20250826110946.507083938@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: fangzhong.zhou [ 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 8b06f5d4a4c3..3fabf4b1f6fd 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -342,6 +342,7 @@ 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 }, {} }; -- 2.39.5