From patchwork Fri Nov 11 16:11:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kumaravel Thiagarajan X-Patchwork-Id: 624550 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 9A887C4332F for ; Fri, 11 Nov 2022 16:11:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232416AbiKKQLH (ORCPT ); Fri, 11 Nov 2022 11:11:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230043AbiKKQLH (ORCPT ); Fri, 11 Nov 2022 11:11:07 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4ED65F5B2; Fri, 11 Nov 2022 08:11:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1668183065; x=1699719065; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=Kmc8i17raTrE43RZ874eLzh3n+igMYXFyGNItktzJzY=; b=tXDauwKH0HRhYNzpvvyuwjGl1UiyHkc222waYEgXysOMk96BeLqxbLxM k9F45nOXBEudpr4l9xRDMhdyh3gee3GWUor8DLPcchkXCDrVY2CQuu19g x0CWXWIpWCLWYxlL7hJL8+rsj0I12B8+laGFQ0VErfbUCa9makqPOw+0w L63CzGeFLeTDKevHGk5G+AfMkGOlw5vnYN7zJa3jKImfsA8gUyjb0lc4d E/iky6cjTDLcUy5irvLXnf+1E81WPhwMyQn96e+sT57PZh8BElTs1f/Lk kLBjKK980j/J6YMg1oiDY5Sh9S+adDD5TYk7uevjnYagb0t+7t51qFw9n w==; X-IronPort-AV: E=Sophos;i="5.96,156,1665471600"; d="scan'208";a="123027573" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 11 Nov 2022 09:11:03 -0700 Received: from chn-vm-ex01.mchp-main.com (10.10.85.143) 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 15.1.2507.12; Fri, 11 Nov 2022 09:11:01 -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 15.1.2507.12 via Frontend Transport; Fri, 11 Nov 2022 09:10:55 -0700 From: Kumaravel Thiagarajan To: , CC: , , , , , , , , , , , , , , , Subject: [PATCH v4 tty-next 0/3] 8250: microchip: pci1xxxx: Add driver for the pci1xxxx's quad-uart function Date: Fri, 11 Nov 2022 21:41:27 +0530 Message-ID: <20221111161130.2043882-1-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 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 (3): 8250: microchip: pci1xxxx: Add driver for quad-uart support. 8250: microchip: pci1xxxx: Add rs485 support to quad-uart driver 8250: microchip: pci1xxxx: Add power management functions to quad-uart driver MAINTAINERS | 7 + drivers/tty/serial/8250/8250_pci.c | 24 +- drivers/tty/serial/8250/8250_pci1xxxx.c | 536 ++++++++++++++++++++++++ drivers/tty/serial/8250/8250_pcilib.c | 34 ++ drivers/tty/serial/8250/8250_pcilib.h | 5 + 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, 612 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