From patchwork Sun Dec 11 01:47:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kumaravel Thiagarajan X-Patchwork-Id: 633459 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 487CAC4332F for ; Sat, 10 Dec 2022 13:12:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229475AbiLJNMv (ORCPT ); Sat, 10 Dec 2022 08:12:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229677AbiLJNMt (ORCPT ); Sat, 10 Dec 2022 08:12:49 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DE1E6448; Sat, 10 Dec 2022 05:12:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1670677966; x=1702213966; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=GEalOp6rlimq1PfGWGifvvxzEdgr1fsj4093Cy8b6u4=; b=t95mb9/qU93ATfIqPY2R4eRFwuzdGCca/hvC2AKVcHl+gL4AElaeUqrs l1/2Zp1OQZ+f93s9N/EEAo8In4ztxr4+2x4lIItyFpMmSHZwVf+81hLes NyelIvhT+H0rNWaUUN0HLqEBJGStx8Qcl3TNolDx8wUoTvhExovzmvNIi 2JyAy6Ou5omsMam4VC0bCF0uIUVOWYyTleVt6+nHTOM+OCHnWUaXHQVW8 PqG/zdHRIP//Kx2meJLNUqJF93L7+xZgf23HDkCCuuw710s2pC2DtPymg pgrsXhXsRpCjWjGz+eLyGoVQxYqyfot7lBU4G9jjntBz4pxrgzUJDBQfW Q==; X-IronPort-AV: E=Sophos;i="5.96,234,1665471600"; d="scan'208";a="127478436" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 10 Dec 2022 06:12:44 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Sat, 10 Dec 2022 06:12:45 -0700 Received: from CHE-LT-UNGSOFTWARE.microchip.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Sat, 10 Dec 2022 06:12:39 -0700 From: Kumaravel Thiagarajan To: CC: , , , , , , , , , , , , , , , , Subject: [PATCH v8 tty-next 0/4] serial: 8250_pci1xxxx: Add driver for the pci1xxxx's quad-uart function Date: Sun, 11 Dec 2022 07:17:26 +0530 Message-ID: <20221211014730.1233272-1-kumaravel.thiagarajan@microchip.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org pci1xxxx is a PCIe switch with a multi-function endpoint on one of its downstream ports. Quad-uart is one of the functions in the multi-function endpoint. This patch adds device driver for the quad-uart function and enumerates between 1 to 4 instances of uarts based on the PCIe subsystem device ID. The changes from v1->v2->v3->v4->v5->v6->v7->v8 are mentioned in each patch in the patchset. Thanks to Andy Shevchenko, Ilpo Jarvinen, Chritophe JAILLET, Geert Uytterhoeven, Greg KH for their review comments. Kumaravel Thiagarajan (4): serial: 8250_pci: Add serial8250_pci_setup_port definition in 8250_pcilib.c serial: 8250_pci1xxxx: Add driver for quad-uart support serial: 8250_pci1xxxx: Add RS485 support to quad-uart driver serial: 8250_pci1xxxx: Add power management functions to quad-uart driver MAINTAINERS | 7 + drivers/tty/serial/8250/8250_pci.c | 25 +- drivers/tty/serial/8250/8250_pci1xxxx.c | 502 ++++++++++++++++++++++++ drivers/tty/serial/8250/8250_pcilib.c | 38 ++ drivers/tty/serial/8250/8250_pcilib.h | 15 + drivers/tty/serial/8250/8250_port.c | 8 + drivers/tty/serial/8250/Kconfig | 15 + drivers/tty/serial/8250/Makefile | 2 + include/uapi/linux/serial_core.h | 3 + 9 files changed, 593 insertions(+), 22 deletions(-) create mode 100644 drivers/tty/serial/8250/8250_pci1xxxx.c create mode 100644 drivers/tty/serial/8250/8250_pcilib.c create mode 100644 drivers/tty/serial/8250/8250_pcilib.h