From nobody Tue Dec 2 00:26:31 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 ACC9A32692E; Tue, 25 Nov 2025 14:45:11 +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=1764081911; cv=none; b=Uwc9newBnxm+BXhrWHDBH+CwxrQYDcXCPT/sRdTbf9gonNfBj/Ztce60QE7ywMd+md4WddmCS4zt9b1Ia3Xfj4cmjF4lx/IclHTss8M7P41d0/kr4hNkG203FGiuoUzgQeF1YgFdQDx5V17rJQ1ihhQXrFNdDLnb9uqk33km4ZE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764081911; c=relaxed/simple; bh=9wiAneIe4PtRYieKALLniV4NVJC0MpqwxX1iHoF/arI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=NSreXKZ/yEBRdKMpZB4hbg+6MVxtJaLYJiZvWWyIsUm3MpsCBSHjHdFCUgp3K74/EJuHaEL0YSewKGUfG4GhR6hZW8B6B7fcxufMAYCqDVU4xWyj5E/FOZH0Ez1Y7/Zr7rqmYJ8R38dEszij3x0/hlyGKIFa8QympOQrOmswoZk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fpQ7VFAd; 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="fpQ7VFAd" Received: by smtp.kernel.org (Postfix) with ESMTPS id 3EBECC2BCB1; Tue, 25 Nov 2025 14:45:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1764081911; bh=9wiAneIe4PtRYieKALLniV4NVJC0MpqwxX1iHoF/arI=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=fpQ7VFAd2pqGR6bj0TlULByIgk+6MsIeIZOBqGCjLPpB5Pw3Dn+NdWfEC6SAfD80Z cXg3GC0vHYxXHI4paDkCDNJ4apBtWqME8QJtwYUkeq4vrwIIT0cPw6WZnKBjP2kl8L Rr24CtHFpfAQnYYOI54SVlWUF/2fZhH9Q4jz3fR9Vd22rKgc8O2HUAMjnhiAiNbLNv 40ZsEwlOrp17XPfEwOaIXy3xHLgTaqWe2Gor5dAQ42jiQHdGp2BzhoeKMHHZ57DL0C RIUwV9XQ7yP1wXxNhJgvCYIqYEWu04qhZXt5C9EWZ7E0r4o5FU/oYS7JQkdkzxhX/l VkMSRCQ/RLTDw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33A83D0E6C6; Tue, 25 Nov 2025 14:45:11 +0000 (UTC) From: Manivannan Sadhasivam via B4 Relay Date: Tue, 25 Nov 2025 20:15:08 +0530 Subject: [PATCH v2 04/10] serdev: Add an API to find the serdev controller associated with the devicetree node 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: <20251125-pci-m2-e-v2-4-32826de07cc5@oss.qualcomm.com> References: <20251125-pci-m2-e-v2-0-32826de07cc5@oss.qualcomm.com> In-Reply-To: <20251125-pci-m2-e-v2-0-32826de07cc5@oss.qualcomm.com> To: Rob Herring , Greg Kroah-Hartman , Jiri Slaby , Nathan Chancellor , Nicolas Schier , Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Mark Pearson , "Derek J. Clark" , Manivannan Sadhasivam , Krzysztof Kozlowski , Conor Dooley , Marcel Holtmann , Luiz Augusto von Dentz , Bartosz Golaszewski Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-pm@vger.kernel.org, Stephan Gerhold , Dmitry Baryshkov , Manivannan Sadhasivam X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=openpgp-sha256; l=1955; i=manivannan.sadhasivam@oss.qualcomm.com; h=from:subject:message-id; bh=V1p0qX3vrz92sD1qV7R72e5ox9rZKasfmlTpIXqG3AM=; b=owEBbQGS/pANAwAKAVWfEeb+kc71AcsmYgBpJcDyF1/pgOLf1aVGEuv44G7i0XrrfAOqmecw2 mzElUd/v5qJATMEAAEKAB0WIQRnpUMqgUjL2KRYJ5dVnxHm/pHO9QUCaSXA8gAKCRBVnxHm/pHO 9bvfB/44AU6EYFmyxS7a2q+VGScl6JakUBZg0CeSHUIPNiLIgltpD0wnO13rOmWVZlBH5iaUmRG eHFX+92RGGqNKq+DblVtUN2wujOTz1iv3YvstidexJufqx6AiAnbMXyIk85S5d5joN0yNQYhhdA ijzPQU9/cij19LvCo3rnTyK8TtU/mV5na5rwUvbKfs4xs9SVTplFPnAW5mmXY2ZCoKNDR3b40eP 2ATF6PeHljysxSNEwGLfEmrgyKduSU2C1FiEf+lTOoZZsJqe8f/rw54zZRbYRQr9/gpUhvgS4XZ daPSu1Th2xsHK4LKi5Q1g4ADiGWwLY9uL6ImU9bLchSUpN95 X-Developer-Key: i=manivannan.sadhasivam@oss.qualcomm.com; a=openpgp; fpr=C668AEC3C3188E4C611465E7488550E901166008 X-Endpoint-Received: by B4 Relay for manivannan.sadhasivam@oss.qualcomm.com/default with auth_id=461 X-Original-From: Manivannan Sadhasivam Reply-To: manivannan.sadhasivam@oss.qualcomm.com From: Manivannan Sadhasivam Add of_find_serdev_controller_by_node() API to find the serdev controller device associated with the devicetree node. Signed-off-by: Manivannan Sadhasivam --- drivers/tty/serdev/core.c | 16 ++++++++++++++++ include/linux/serdev.h | 9 +++++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 76b89dd0720f..f90095cb778f 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -530,6 +530,22 @@ struct serdev_controller *serdev_controller_alloc(stru= ct device *host, } EXPORT_SYMBOL_GPL(serdev_controller_alloc); =20 +/** + * of_find_serdev_controller_by_node() - Find the serdev controller associ= ated + * with the devicetree node + * @node: Devicetree node + * + * Return: Pointer to the serdev controller associated with the node. NULL= if + * the controller is not found. + */ +struct serdev_controller *of_find_serdev_controller_by_node(struct device_= node *node) +{ + struct device *dev =3D bus_find_device_by_of_node(&serdev_bus_type, node); + + return (dev && dev->type =3D=3D &serdev_ctrl_type) ? to_serdev_controller= (dev) : NULL; +} +EXPORT_SYMBOL_GPL(of_find_serdev_controller_by_node); + static int of_serdev_register_devices(struct serdev_controller *ctrl) { struct device_node *node; diff --git a/include/linux/serdev.h b/include/linux/serdev.h index ffc6eb13f44b..fa235c92592a 100644 --- a/include/linux/serdev.h +++ b/include/linux/serdev.h @@ -337,4 +337,13 @@ static inline bool serdev_acpi_get_uart_resource(struc= t acpi_resource *ares, } #endif /* CONFIG_ACPI */ =20 +#ifdef CONFIG_OF +struct serdev_controller *of_find_serdev_controller_by_node(struct device_= node *node); +#else +struct serdev_controller *of_find_serdev_controller_by_node(struct device_= node *node) +{ + return NULL; +} +#endif /* CONFIG_OF */ + #endif /*_LINUX_SERDEV_H */ --=20 2.48.1