From patchwork Mon Feb 10 19:29:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: George Hilliard X-Patchwork-Id: 214312 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10128C35254 for ; Mon, 10 Feb 2020 19:30:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A96A020661 for ; Mon, 10 Feb 2020 19:30:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=kopismobile-com.20150623.gappssmtp.com header.i=@kopismobile-com.20150623.gappssmtp.com header.b="1AtFHHgH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727433AbgBJTaK (ORCPT ); Mon, 10 Feb 2020 14:30:10 -0500 Received: from mail-ot1-f65.google.com ([209.85.210.65]:37573 "EHLO mail-ot1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727029AbgBJTaK (ORCPT ); Mon, 10 Feb 2020 14:30:10 -0500 Received: by mail-ot1-f65.google.com with SMTP id d3so7575089otp.4 for ; Mon, 10 Feb 2020 11:30:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kopismobile-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=ttAcZsliGUSH7WXcVjhAV/BjixYVK4XpgsWIL/Hit7c=; b=1AtFHHgHTS8qKJtFng0Lcn4Jx4ytAEVwvCUlERa4Y3S5RvhtlfDYKcw5tJIrzxyEG4 IqCK0NQ0KONUD9HDQ/TbOjpSiCQ7mFNUUyB5+8lBhVAojD7115tcyNDvWJA/lmEcE/rl f9/7FDFVGPinXDYg4h+Qf3+x3mR23lFwQe9mxbJaTinUkaULX4UI5bChPyjB8gM6OfbT qgC+ZklVkry+/NA01RoouDRmlKAXwJqr8TtKARNMw/ognzPg3BHKWjLnX8H83Z/Cl7Ji 3kq+Rs9oMPR6eFOsTdtROvxibm9ytUX3TNFHBns5fj5vqN/j9MmWjCBjOXQH/1rW/pGv PsUw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=ttAcZsliGUSH7WXcVjhAV/BjixYVK4XpgsWIL/Hit7c=; b=VtpLdJ+TQEa0YSnzdPnZKe9Zhbl/f/XhRYXzQNYGVpvIvKo/Vufo/GXDgz9ybPJmdN nQVSkA8AfxC0g73K+2hopkBGPzM105lMYpCMC7DoT245BNl8+CH8p7DaQm8ax+RXq8eX yyP+5NLyvxVphIbnviQlwTKSHHkrgWQ2rJWWPRyxftPljxzzOx7QSOWB//vqUAwkGRI8 C4FCaOlBjfDNKpHj9dX+XMzsqJ25aY6WYDQUdXTKT5IX6i9p0JFxpN4BtAVsxlPH+7aM +rcw4zzKoMo9r/EDlhDyhiT//ygp9sFu65OhndFShwC/O/X8IZetoNhRzb1elFrOuVlW y0Og== X-Gm-Message-State: APjAAAXas0Jmxfdjp95ycMuu+8eblLVZcv5kfEpR6TaJalZ4DrEeLjnJ MSTcvbu5EpZd8UbFXD+YngXBRg== X-Google-Smtp-Source: APXvYqxwMvwLJXzmeZp/mbXuPai64iNGbAETuUWWzd3ig2H/OVUaeJjjRbpJC27IHP+Q3FkjW1CeJg== X-Received: by 2002:a9d:1ca3:: with SMTP id l35mr798534ota.271.1581363009457; Mon, 10 Feb 2020 11:30:09 -0800 (PST) Received: from farregard-ubuntu.kopismobile.org (c-73-177-17-21.hsd1.ms.comcast.net. [73.177.17.21]) by smtp.gmail.com with ESMTPSA id n22sm412163otj.36.2020.02.10.11.30.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2020 11:30:08 -0800 (PST) From: George Hilliard To: Greg Kroah-Hartman Cc: George Hilliard , NXP Linux Team , linux-serial@vger.kernel.org, devicetree@vger.kernel.org, kernel@pengutronix.de Subject: [PATCH v2 0/2] Implement support for inverted serial TX/RX on i.MX Date: Mon, 10 Feb 2020 13:29:47 -0600 Message-Id: <20200210192949.7338-1-ghilliard@kopismobile.com> X-Mailer: git-send-email 2.25.0 MIME-Version: 1.0 Sender: linux-serial-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org This peripheral has dedicated control bits that flip input/output signals before handing them off to the OS. This is useful on my hardware because the UART is connected to an RS-422 transceiver with the +/- pins hooked up backward. Instead of a hack flipping all the bits before sending them, the hardware can do it for free. Functionally unchanged from v1, but the confidentiality notice has been removed. I also CC'd other lists that Uwe suggested. George Hilliard (2): dt-bindings: serial: document fsl,inverted-tx and -rx options tty: imx serial: Implement support for reversing TX and RX polarity .../bindings/serial/fsl-imx-uart.txt | 4 ++++ drivers/tty/serial/imx.c | 22 +++++++++++++------ 2 files changed, 19 insertions(+), 7 deletions(-)