From mboxrd@z Thu Jan 1 00:00:00 1970 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=-11.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT,USER_IN_DEF_DKIM_WL 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 6A3FAC433E0 for ; Wed, 1 Jul 2020 21:13:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3492720748 for ; Wed, 1 Jul 2020 21:13:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="X4N13e+9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727062AbgGAVNo (ORCPT ); Wed, 1 Jul 2020 17:13:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726144AbgGAVNn (ORCPT ); Wed, 1 Jul 2020 17:13:43 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 32D1CC08C5C1 for ; Wed, 1 Jul 2020 14:13:43 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id k127so22967998ybk.11 for ; Wed, 01 Jul 2020 14:13:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:message-id:mime-version:subject:from:to:cc; bh=1693jLPCRTZKv04e3tT1L2R/SD/azULEZvoSLa7Hf7o=; b=X4N13e+9sePnsNX3KaC3ifEpq8r8prYY7zHclzCR5upKpuH+zMAIp0a3v81FRPNLSQ G/oEf3GoGKzfnImMohbfzdfak484FP/LerO7QfZnV6oiJy5RkPeJ4JGyaWW4d/KoT+og xaCTxxyLWdrK4Iy5oj1E4JZQLNCwWwFK+QmJ/rHwp8YgFpakYgrdyJcDKvQ7Hhutimdk veAa42QeTkaDOUzn9UlIWlC4KV+uT51zeVpLjn2F2l8a/oToAXzSKFN4laYPXVsvB7KO IWeEQJElTFTPPbn1R8LGZw8Vc3cSYrMYEomRY+SMbjXzjp+LawK0qruJeF/TCA8JmuqR 92mA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=1693jLPCRTZKv04e3tT1L2R/SD/azULEZvoSLa7Hf7o=; b=VK1PIQHEDvIQaxvomxDexBUM04+DiZo2aN0CVDF6XZrnJofhj04/Df+XdkhtZxl5FR a757I8pRdl6NFm71Pz/pxWCnk9h5gM8Al8NirinV5mNuOeE7eZ30g2ohZBLD0QqNm8+E zPNIA3RujCUhLJh9Np2YJlyYBQpdA4GBj6NUFvsbuTPH4Stt+Sn1nB499b800tFRNtwh xP0NJPODW5yAkR6Z+QfhdC5nHEdXmIWPAGETC55MR5u7yrBtvfVNbHnjXzlk1lVn2mMm oivbifaJ/l0IAcrEzy30j5rnccVX0MW6mQObw+PGUTA2ZJBu2WmKNRiAsmO9Wcu9QWXa gEow== X-Gm-Message-State: AOAM530yMCAX75p1GF9zJLknHTUEzOuhgzTAX/hO6cBrHaI+xNV3e7Ye AXVLCg7zvOM856Ik2V9IYuwEK6ddwnwR/rIpyG67 X-Google-Smtp-Source: ABdhPJz8wsHLEwNJYlVtw6qZZkh7AGzr6LYq5q8mwTBXuA/WiMwNXf+RKMjvBio06uTM33Rt9QsVW8X11w5NfovFi+WJ X-Received: by 2002:a25:c7d3:: with SMTP id w202mr29331301ybe.84.1593638022312; Wed, 01 Jul 2020 14:13:42 -0700 (PDT) Date: Wed, 1 Jul 2020 14:13:36 -0700 Message-Id: <20200701211337.3027448-1-danielwinkler@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.27.0.212.ge8ba1cc988-goog Subject: [PATCH v2 0/1] Revert "serial: 8250: Fix max baud limit in generic 8250 port" From: Daniel Winkler To: linux-serial@vger.kernel.org, linux-mediatek@lists.infradead.org, Serge Semin , Alexey Malahov Cc: BlueZ , chromeos-bluetooth-upstreaming , stable@vger.kernel.org, abhishekpandit@chromium.org, Daniel Winkler , Aaron Sierra , Andy Shevchenko , Greg Kroah-Hartman , Jiri Slaby , Lukas Wunner , Vignesh Raghavendra , linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This change regresses the QCA6174A-3 bluetooth chip, preventing firmware from being properly loaded. Without this change, the chip works as intended. The device is the Kukui Chromebook using the Mediatek chipset and the 8250_mtk uart. Initial controller baudrate is 115200 and operating speed is 3000000. Our entire suite of bluetooth tests now fail on this platform due to an apparent failure to sync its firmware on initialization. The driver is in the cros tree at drivers/bluetooth/hci_qca.c and uses the serdev interface. Specifically, this is the QCA_ROME chipset. Daniel Winkler (1): Revert "serial: 8250: Fix max baud limit in generic 8250 port" drivers/tty/serial/8250/8250_port.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) -- 2.27.0.212.ge8ba1cc988-goog