From patchwork Fri Dec 16 05:26:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kumaravel Thiagarajan X-Patchwork-Id: 634790 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 E29BCC4332F for ; Thu, 15 Dec 2022 16:52:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229517AbiLOQwO (ORCPT ); Thu, 15 Dec 2022 11:52:14 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44962 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229480AbiLOQwO (ORCPT ); Thu, 15 Dec 2022 11:52:14 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9609E26107; Thu, 15 Dec 2022 08:52:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1671123130; x=1702659130; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=B65eeEOBlhMcgevYuQJPH0nL/7LUbZ6ZkzNYMjmoIEo=; b=Gf3fp1AylDqgLHmVTdAWmHp8H4zD3YMQXIcAGfWNwikGA2yA4psXKxiq j8aQCERVBbX0J4u1KtsJ1Eq9d/742LS9+q8FUQiQUtybq1ywpW3P2DuGm JLtIXDa3IJbOFHz2N6eonO0xQ2+R7Xic3u54+QW++RYDKdgXdgxW+LOjp OzgVB9IR7+DP/EcUvsju7K81W232VM/aiJ9qiMerldcM1GmGOuCLO4av/ YUOb32qIiMbul0CD4mxEkKjrkiAy90l57ufXZta44yB8q7Ej8QV9vt9/J 5iL5plCAgFR5Ae3fDXqucJZK5UrIpygG2LCvNtaHKnP8LEo3JWNMuMmoR g==; X-IronPort-AV: E=Sophos;i="5.96,248,1665471600"; d="scan'208";a="191874359" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa2.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 15 Dec 2022 09:52:08 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Thu, 15 Dec 2022 09:52:07 -0700 Received: from CHE-LT-UNGSOFTWARE.microchip.com (10.10.115.15) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Thu, 15 Dec 2022 09:52:02 -0700 From: Kumaravel Thiagarajan To: CC: , , , , , , , , , , , , , , , , Subject: [PATCH v9 tty-next 0/4] serial: 8250_pci1xxxx: Add driver for the pci1xxxx's quad-uart function Date: Fri, 16 Dec 2022 10:56:52 +0530 Message-ID: <20221216052656.2098100-1-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->v9 are mentioned in each patch in the patchset. Thanks to Andy Shevchenko, Ilpo Jarvinen, Chritophe JAILLET, Geert Uytterhoeven, Greg KH, Jiri Slaby 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 | 493 ++++++++++++++++++++++++ drivers/tty/serial/8250/8250_pcilib.c | 39 ++ 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, 585 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