From patchwork Fri Apr 8 12:26:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Caron X-Patchwork-Id: 12806723 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 96F51C433F5 for ; Fri, 8 Apr 2022 13:01:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=OxD2jUlClySn1SXa0Jwai2X4jJxv8AGUv9EPIutynSo=; b=uc0lUy/2A3we6k wuJ3IoMdYLAH+zb37Slqx/YHlapb2ZaCPt6qTJOgQTpopUyvOwSfo4uDFKKY6P8IKmqDoVjAr1sBv sQIjRTZvcKbGCSNS7gRzoD7a/RWhQbWJFyi/9DadJSpt66inc0lAa78Gwo+6+lafuYuHxGgaP02XX pln6SGF0EK6lYa5Te7LvR3b6mg+Nk2ejHahMs51FWG/YjZ5u1/E21N0AIrkr83IfEPtUgjyindZaH fF0ru6uTAu/pEZvTki1EAZz7CCBMvP29q1zzr4kFvfmKWREchFfWlNaRG+Kqcofbc6Ow8oBGZ5ddO JcYnSQKTdKsO/+PP5/wA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ncoDu-00HDcN-1E; Fri, 08 Apr 2022 13:00:22 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ncnht-00GzV7-I4 for linux-arm-kernel@lists.infradead.org; Fri, 08 Apr 2022 12:27:19 +0000 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.1.2/8.16.1.2) with ESMTP id 2389niGA022034; Fri, 8 Apr 2022 14:27:04 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=selector1; bh=dTAXQp+cFjdIWlRb6J7G7W0/qZzdDyJ57D7J0I+JRLE=; b=2kt2tzQ0xJEwsVv/p6RD8AeVwBts83H5Zwyswg20qjAYuGRw9iUTfj0NW5l1Api1G+Rg 5XFIUrVWGmpSqKnNdLP7+NNVjCw0EGCWcYEyAPEOmBVGFtc5SWpMA0qBHHDlt2Kd1PFe t9yeyWEVKAWzoheBb1/e9DJkwHICxxx4v4wetnX03dmcSmAhz/qMluxOC1AtUWx2Zxrz hC10JAYHoAoeaTU3HBQQSP1L45v0tkw+VaukveEvMzcqz6OZIQvVumaumNJl9ZMS7Y1a kljROp4Jh58qsRZO2P14ZCwFU5nFu8GS4YZeMAT+2MeaQZUPMPKo7t0Kid330teRwMiV Bg== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3f8x9gu5ej-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Apr 2022 14:27:03 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 04F8C10002A; Fri, 8 Apr 2022 14:27:03 +0200 (CEST) Received: from Webmail-eu.st.com (sfhdag2node2.st.com [10.75.127.5]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id F1FA121A21E; Fri, 8 Apr 2022 14:27:02 +0200 (CEST) Received: from localhost (10.75.127.49) by SFHDAG2NODE2.st.com (10.75.127.5) with Microsoft SMTP Server (TLS) id 15.0.1497.26; Fri, 8 Apr 2022 14:27:02 +0200 From: Valentin Caron To: Greg Kroah-Hartman , Jonathan Corbet CC: Jiri Slaby , Maxime Coquelin , Alexandre Torgue , Erwan Le Ray , Valentin Caron , , , , , Subject: [PATCH V2 0/3] serial: stm32: add earlycon and polling mode Date: Fri, 8 Apr 2022 14:26:33 +0200 Message-ID: <20220408122636.505737-1-valentin.caron@foss.st.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG2NODE1.st.com (10.75.127.4) To SFHDAG2NODE2.st.com (10.75.127.5) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.858,Hydra:6.0.425,FMLib:17.11.64.514 definitions=2022-04-08_04,2022-04-08_01,2022-02-23_01 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220408_052718_283135_540B00F4 X-CRM114-Status: GOOD ( 12.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org - Add support of early console and polling mode in stm32-usart driver. - Avoid a possible infinite loop in putchar function. Changes since v1: - Fix warning "unused variable 'ret'" Valentin Caron (3): serial: stm32: remove infinite loop possibility in putchar function serial: stm32: add KGDB support serial: stm32: add earlycon support .../admin-guide/kernel-parameters.txt | 6 ++ drivers/tty/serial/Kconfig | 1 + drivers/tty/serial/stm32-usart.c | 100 +++++++++++++++++- drivers/tty/serial/stm32-usart.h | 2 + 4 files changed, 104 insertions(+), 5 deletions(-)