From nobody Tue Dec 2 02:42:39 2025 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 443D117D2; Wed, 19 Nov 2025 00:46:43 +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=1763513204; cv=none; b=WeR+6Svk36XfUYQ4zSCH6OgIPAcVwaaZJ3jo9MTyFjbAT6g27UCUlhSxly6ffWcSvJnwMfjFscLp6au5foXNv3Qy3BHNPzkHAx9+pgsxnrmckE5uWCjscMEYh6CGNhev05dEo3Np7BvlTB3fSoe8yYB6+mcngpx7VjWL10xRFq8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763513204; c=relaxed/simple; bh=cdSI8LbaBnlLN9m0wxvQS1K3z96XEujbOZ2RnvZCx6A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=o+cP3f+zOhW52evG3uSXJLyty/lBgPIb18oogzfMTjL43Q/DC2rqju0381Bun3TO8oQ4Bsoj5GrYf/p8i1XmLM2SiNSSickDGjx2d26Y7e7KgIHoTrUAgzpReZVE/HcgJmimm/om9sbFdI3C1Sx2GTVmd77Fcg3AUGTsywjQlQ4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=hUCfmZvJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="hUCfmZvJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E4AC8C4CEF1; Wed, 19 Nov 2025 00:46:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1763513203; bh=cdSI8LbaBnlLN9m0wxvQS1K3z96XEujbOZ2RnvZCx6A=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=hUCfmZvJWHjgrr43OYn0eeeQV3njwmBJSuwIgT6hnwDel8ONj++qvUNOy4Ru7g7Yp bcfOn3bjhq4q+539TZTOo9TovKH8Ms1M45Y80XQtSKthKmvd7SSCJjYCaizzRl/g+l ZRzrYgX9u/LvJZR1zHEcz/tedPtUbz3BQkE6qCwcT9n12aon0uHjqeEMS0n4ZXDsPc Ih8vzc8guVAd8RZmjjOeyMUrDGFHZpL1G9KESMJqUZQwWUlOHjgRXqI6c42qraMne6 RGGvGv6kwZGYMaJcWqxazjeYPFANbRLtPVOoXM6qFnaeBfBpDDW5Qa0Pn27TJYogNq LWTE+ZTIbDNpA== Received: by venus (Postfix, from userid 1000) id 95EFF18121F; Wed, 19 Nov 2025 01:46:38 +0100 (CET) From: Sebastian Reichel Date: Wed, 19 Nov 2025 01:41:43 +0100 Subject: [PATCH v2 4/4] platform: arm64: thinkpad-t14s-ec: add suspend handler for keyboard backlight Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251119-thinkpad-t14s-ec-improvements-v2-4-441219857c02@kernel.org> References: <20251119-thinkpad-t14s-ec-improvements-v2-0-441219857c02@kernel.org> In-Reply-To: <20251119-thinkpad-t14s-ec-improvements-v2-0-441219857c02@kernel.org> To: Sebastian Reichel , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Bryan O'Donoghue Cc: platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1214; i=sre@kernel.org; h=from:subject:message-id; bh=cdSI8LbaBnlLN9m0wxvQS1K3z96XEujbOZ2RnvZCx6A=; b=owEBbQKS/ZANAwAKAdju1/PIO/qaAcsmYgBpHRNuMNSkH06UH9q4lDwu2ET3xLtzqz62e1MRJ CDJ6W0xa/GJAjMEAAEKAB0WIQTvZg0HRj+Lcmp5VBPY7tfzyDv6mgUCaR0TbgAKCRDY7tfzyDv6 miuLD/9jk8PXR3zjf3d/NP6C7qBSJEz/f09A9ZcW0iV2GqZ27esdHp12yJ9l+SHbNYanbKWIhJP VZV9kFFnZXDIVMtXoXamPlPElPbHL23QwdrcP4hz6vtsAAjGFOC57lj/ZI3NEdLu2yMiOwrljx5 ewo0LtZEuPYYg7xyIvjAVnHEWCsAzwZGHoBo8uqla6Jxsn5olR9uzf+mXgFxnY3I8sXTYTeGW7i t/qnbfTngSmS8o8qwUU9sE6aPnFtHxrbblRmxU5OSYYp97+adxlye44F75H5Uwrb5Rmaoe92ZAr qjMNuyyqQPPAqD24cV4XzjjZU36w3XXk2S2udfJkyKtFWm28gSUueQq6a8roIlwwrLfof5ZLd4J QHkpZlFO9Wk/PDAVIQmce/685Cu0quH11OtqzIsn6prDmPgp0J80+PwxfG0bBBAt654dAtaBLzw b10dHl8KGJqALfitKAX1TE7MCj7023BBOwFHiV37bGTWHEeG6/K4Ukp6XZHe59rwKjQn1ZbBt5G Chtu4zYGbAIqm3L7ueUvwtlDgJgkD43OquFOxNO6nPNUXDR2qcZzSE8giCv1CFrLMrdJ827wbvy zZuE9/+FUwzg85NbpHKmdy9PLp5/AgPKqaQWo6ZZINdqcowwvHi5I2YKztIMeVvg3WIV5Kb0Dow L9uRJwlhuh66MDw== X-Developer-Key: i=sre@kernel.org; a=openpgp; fpr=EF660D07463F8B726A795413D8EED7F3C83BFA9A This ensures that the keyboard backlight state is restored after a suspend-resume cycle. Otherwise the keyboard is automatically disabled during suspend and then stays disabled after resume. Note, that this adopts the same behavior as the existing Thinkpad ACPI driver. Signed-off-by: Sebastian Reichel --- drivers/platform/arm64/lenovo-thinkpad-t14s.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/platform/arm64/lenovo-thinkpad-t14s.c b/drivers/platfo= rm/arm64/lenovo-thinkpad-t14s.c index cf8eff50d710..5590302a5694 100644 --- a/drivers/platform/arm64/lenovo-thinkpad-t14s.c +++ b/drivers/platform/arm64/lenovo-thinkpad-t14s.c @@ -610,6 +610,8 @@ static int t14s_ec_suspend(struct device *dev) { struct t14s_ec *ec =3D dev_get_drvdata(dev); =20 + led_classdev_suspend(&ec->kbd_backlight); + t14s_ec_write_sequence(ec, T14S_EC_REG_MODERN_STANDBY, T14S_EC_MODERN_STANDBY_ENTRY, 3); =20 @@ -623,6 +625,8 @@ static int t14s_ec_resume(struct device *dev) t14s_ec_write_sequence(ec, T14S_EC_REG_MODERN_STANDBY, T14S_EC_MODERN_STANDBY_EXIT, 3); =20 + led_classdev_resume(&ec->kbd_backlight); + return 0; } =20 --=20 2.51.0