From patchwork Thu Nov 24 10:02:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ricardo Ribalda X-Patchwork-Id: 628517 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 87DD1C43219 for ; Thu, 24 Nov 2022 10:02:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229959AbiKXKCs (ORCPT ); Thu, 24 Nov 2022 05:02:48 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229719AbiKXKCo (ORCPT ); Thu, 24 Nov 2022 05:02:44 -0500 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F8051CB18 for ; Thu, 24 Nov 2022 02:02:41 -0800 (PST) Received: by mail-ej1-x636.google.com with SMTP id bj12so2963722ejb.13 for ; Thu, 24 Nov 2022 02:02:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=cc:to:message-id:date:from:content-transfer-encoding:mime-version :subject:from:to:cc:subject:date:message-id:reply-to; bh=6eIMyEhsOzzAGNHE3cNtx6ptsH6jAPHZtkqtEKGyaLk=; b=mtzCPunrgB/P4FGyrvH+DJw4yWdymYTEbEp8pjtcBr7oqMYTrx/CHjO4ukHDj9ufdZ qVpa1iTuQhTCnV+Sz2cwNnF8Haw6yST+J4kfhkXn2ShIB1GIJclhxjHFgnPLDdTLAWoX ruLygMOr4hmDnnAIbvz0DrJWebV57wXeuvHb4= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:message-id:date:from:content-transfer-encoding:mime-version :subject:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=6eIMyEhsOzzAGNHE3cNtx6ptsH6jAPHZtkqtEKGyaLk=; b=cC+P27OIy1af1MrAgTX0rhgyAT2IPom/SY+YbTuwiMf1CNfIkowD4HBaQVirWfcYe2 YPW+X9m3J/TVFNk3rGoTvGlqUuvnOCrL4+a2JM1nj+QJO/8EY0PWXRUFr7G2kfxhpX9l QRp6U873tTLF1wZ+hyM+orXprbFPbcSBWRl1sBDkxkvJDB/ywktYSJEMe21NpbRJ/bjr H/GOLUzKcL6/B+PFO8Aj8AphX7NP5IJnPpxAf3Xl6Z9V8kWLkgGPJJ7m0/zb8VK75UVs hLhAeSnLkfESC9JcetAiKgyKCWIgwL/rMdm4kmK2IOzSZoYgL3HcOyGHU8+TuCRIs+iH q6dw== X-Gm-Message-State: ANoB5pnO9Z19pa5hypsfJ+VJMXd0pXsMDWyQdbQDhly2Ur7YUI4/XyYY XiFs9mAz3ynh0Px+mM72/TsfrA== X-Google-Smtp-Source: AA0mqf4fzyoLoop57uBwx2ohDUKrbEGT8U9T7pnnGxroWHWnIImy1NhlAdD7dqX1iyJIJXrn0vjEUg== X-Received: by 2002:a17:906:2e83:b0:78d:b3f0:b5c0 with SMTP id o3-20020a1709062e8300b0078db3f0b5c0mr27904342eji.141.1669284160088; Thu, 24 Nov 2022 02:02:40 -0800 (PST) Received: from alco.roam.corp.google.com ([2620:0:1059:10:2a85:84f4:13a1:b293]) by smtp.gmail.com with ESMTPSA id i29-20020a50d75d000000b0046a44b2b5e6sm335548edj.32.2022.11.24.02.02.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Nov 2022 02:02:39 -0800 (PST) Subject: [PATCH v2 0/2] earlycon: Let users set the clock frequency MIME-Version: 1.0 X-b4-tracking: H4sIAClBf2MC/22NTQ7CIBCFr9LM2jEMFmtc9R7GxRSwECkkYJuYhruLrl29fC/vZ4dis7cFrt0O2W 6++BQbyEMH2nGcLXrTGKSQkkie8JvngDo88aLMNAhiw2qAVpi4WJwyR+1aJa4hNNP58kr5/TvYqMnt 79ZGKJAeQqme+zMbGrXLafHrckx5hnut9QPaKpgyrAAAAA== From: Ricardo Ribalda Date: Thu, 24 Nov 2022 11:02:17 +0100 Message-Id: <20221123-serial-clk-v2-0-9c03ce8940d8@chromium.org> To: Greg Kroah-Hartman , Jiri Slaby , Jonathan Corbet Cc: Ricardo Ribalda , linux-doc@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.11.0-dev-d93f8 X-Developer-Signature: v=1; a=openpgp-sha256; l=1154; i=ribalda@chromium.org; h=from:subject:message-id; bh=ipQ2kNvTA4ADg+/HdXcEtkOOhqoFcmX4YejwFb+YLHY=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBjf0Eu/uudDGFjuS9xXphy6PjsIC4Mgo34NdDc+Jw0 Fz4exfKJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCY39BLgAKCRDRN9E+zzrEiD2ED/ 9Iml3PgJm8eNS34z07D3DLehC6bG0ENU2k6WqsGGq6Zs1d3g1jdZ8OZ0MAIxUc+ppnnALv8VuZEMlD EgZOkjNXmPlz69oYUZ1LFUeh2wHzZLCckkaW79f5Z/bivxGRy3TvP0d3Cj49RQqO2qwJ2zQvZPO8Pm HbRBDmjwWCmD++Zg6g226sipjBNSWs7Ktsxykmzk8QSFYBnU93F2UwBVeJIzFViybo+4RBzfdJN0mQ fTyg/gtPG0kLvLZzf12i+AVKPlZ+WaNMeSlYNhMl6sCgF6z3+T+kb1ld4ZYR8XVPD/tk5y2pTp+6Dz e2XvOAHrpja1BBr0kddUDass+E2sySjOa30IgTmWXTME9SJDIG5iLN5JXjMb7ZQ4AWEZPf+fb+9ORI HLAkkFQwEFNVQaJP3S/K4SZRmYYSe4yvE8WHbPkbrBEyO8OlGQh0FDnStahNlPishusmlaYB58vfVh 7Nd8VCC+uuwlAH5S0ySjnMgK+vyqiKWkfEwhn2ChACnKfaFBwpLaIauJ7tMmnSCwetNjNJ6k1Fw3ZR Q7jl6KHgnJxUImigv+2ttFewBJ4TaI6+c9Abs0lAQFLxO9RC20tep9jSVnTZOSn4V/UJh531ivkS+X mkmKYESu3r2pO2mdz6MXMcii+LRYGUHrhWJX4yytFBtXuqmOt5HacL054Y6A== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-serial@vger.kernel.org Some platforms, namely AMD Picasso, use non standard uart clocks (48M), witch makes it impossible to use with earlycon. Let the user select its own frequency. To: Jonathan Corbet To: Greg Kroah-Hartman To: Jiri Slaby Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-serial@vger.kernel.org Signed-off-by: Ricardo Ribalda --- Changes in v2: - Add a patch to fix handling of baudrate - Use kstrtouint instead of simple_strtoul - Link to v1: https://lore.kernel.org/r/20221123-serial-clk-v1-0-1f0554a46ad1@chromium.org --- Ricardo Ribalda (2): earlycon: Replace simple_strtoul with kstrtouint earlycon: Let users set the clock frequency Documentation/admin-guide/kernel-parameters.txt | 12 +++++++----- drivers/tty/serial/earlycon.c | 17 ++++++++++++++--- 2 files changed, 21 insertions(+), 8 deletions(-) --- base-commit: 4312098baf37ee17a8350725e6e0d0e8590252d4 change-id: 20221123-serial-clk-85db701ada57 Best regards,