From patchwork Mon Feb 6 17:26:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kumaravel Thiagarajan X-Patchwork-Id: 651215 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 123C0C05027 for ; Mon, 6 Feb 2023 04:50:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229493AbjBFEu5 (ORCPT ); Sun, 5 Feb 2023 23:50:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35810 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229478AbjBFEu4 (ORCPT ); Sun, 5 Feb 2023 23:50:56 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BADAF16323; Sun, 5 Feb 2023 20:50:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1675659054; x=1707195054; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=gXi8MzWL5CgbgE4l4hWH4RC21PLBULLSbEadbogzKT0=; b=QYAgaz+dd3ndG5KdOIZStw6ambnFFW5ldYFxV8rzBN3634sRWzfcv7zb GBk8RsGOcU6ELdViPEGgCUUFq2XzSWkkfYIP4B+xyawo+Ta2tDfN9EOzm YPn9BXYzRJpIT+NXvHXUJFkV10fdaxmFCWqxH79jCG+2ibo/GtZl54Zes a3trnuoX50Sxmiv3Oaen5TFIcnmKxSxm1TFHa2XMyNzJqDovJ4JCGTplV M0d+ABqZsMSUqC59+0DvlBStK0yipy1wXDXQNs4Wib40DRGJjce10/Wl4 us9pH8jfA80LMCD4Wvwk5pdq070K5gvR3mQGY8xyfCnxaqwP9XJ6mVsVy g==; X-IronPort-AV: E=Sophos;i="5.97,276,1669100400"; d="scan'208";a="195466563" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 05 Feb 2023 21:50:54 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Sun, 5 Feb 2023 21:50:52 -0700 Received: from CHE-LT-UNGSOFTWARE.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Sun, 5 Feb 2023 21:50:47 -0700 From: Kumaravel Thiagarajan To: CC: , , , , , , , , , , , , , , , Subject: [PATCH v12 tty-next 0/4] serial: 8250_pci1xxxx: Add driver for the pci1xxxx's quad-uart function Date: Mon, 6 Feb 2023 22:56:09 +0530 Message-ID: <20230206172614.2928838-1-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->v10->v11->v12 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 | 494 ++++++++++++++++++++++++ drivers/tty/serial/8250/8250_pcilib.c | 40 ++ 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, 587 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