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 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 32C50C55167 for ; Fri, 31 Jul 2026 06:39:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=PIv+F26BNVr7dhxYPr2NnYA8AF/RtfgiHoEZ9D5iZbk=; b=PaY7oUtpTZ/qC5U8HC6wnfNiNj tz0FIOzT+WErbz9qS8OmTBaBQtLDgqXyt18xB6qKCapnYqBw6iuq5Tl/nbra/67+p+HrscOqM2D9n n5M1Yfrm68XsYB0nZOR4uoyrNRE5SSTf8F/xLuiS/U6hPMDiY2tMIFTTeFzxg92sYBPnk924vFy9b Q4vHaMWhvs62Wi3sJbMLqeD2Z6jX6jm3xMjFNXvWswywkgZ3uJjXFgvHj//bkJApnXiiomy9o89A3 u9rutoZCD25KcDCIb/F7sCMCyDl2hOgTZz+omKDofQd8dN2bPM35DQn8ZDWZlEXlOwLy2EOYbtEy7 QzGgim8g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wpgtf-0000000BtbE-2QwK; Fri, 31 Jul 2026 06:39:07 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wpgtd-0000000Btb0-3ZK7 for linux-arm-kernel@lists.infradead.org; Fri, 31 Jul 2026 06:39:05 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 3E7C240BA9; Fri, 31 Jul 2026 06:39:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A25B1F000E9; Fri, 31 Jul 2026 06:39:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785479945; bh=PIv+F26BNVr7dhxYPr2NnYA8AF/RtfgiHoEZ9D5iZbk=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=XPexk5v29ATyVqYAg2xoVQeYFXWex6PGomvoIkLWOyXVnReOX0mMzvfiokZb7ML4M luxxjCJhedUFlrnvC5HwnGuhtOZLIGJ2ibMD2jNrumkb+U5R9i7E9pjrez1HuOPZio 1YVCJqj8a9tlRxyh+pw1ZAtsuCk9XvJ3U9Yujg9mkKd5vwa3jF8tu8w4PYd1gplK7r 0U3VKh8OpyblCfEKrLboHWQ5Do06F0Q0/WQ7Hlwa7/vbz8zDs1M+t17s7Jo9Wx+L6e x6PKLnivRaFHIdrh7CmlSgwS8o+R/AI8kkD8Uj1XERJZcWdBaqGGc1yi6K3HP8Ah6d fT5UAEQ0mL76w== Message-ID: <15efee24-e6bc-45f7-8c60-e37e667628d5@kernel.org> Date: Fri, 31 Jul 2026 08:38:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 08/10] serial: ambarella: add Ambarella UART driver To: Long Zhao , Arnd Bergmann , Alexandre Belloni , linux-arm-kernel@lists.infradead.org, soc@lists.linux.dev Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org, Michael Turquette , Stephen Boyd , linux-clk@vger.kernel.org, Linus Walleij , linux-gpio@vger.kernel.org, Greg Kroah-Hartman , linux-serial@vger.kernel.org, Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org References: <20260730104330.81367-1-longzhao@ambarella.com> <20260730104330.81367-9-longzhao@ambarella.com> Content-Language: en-US From: Jiri Slaby Autocrypt: addr=jirislaby@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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 On 30. 07. 26, 12:43, Long Zhao wrote: > Add an Ambarella UART driver with console support for early boot > bring-up on CV75. Keep udelay() in wait_for_tx(); it runs under > console/poll paths that may hold the port lock with IRQs disabled. Overall: * use guarded locks (guard(), scoped_guard()) * rewrite console to nbcon, e.g. as in 8250 [1] * can the i/o read/write+timeout helpers be applied here * always add an i/o timeout * do not cast void pointers: amb_port = (struct ambarella_uart_port *)(port->private_data); [1] https://lore.kernel.org/all/20260729120439.281252-2-john.ogness@linutronix.de/ thanks, -- js suse labs