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[2620:137:e000::3:8]) by mx.google.com with ESMTPS id q18-20020a17090311d200b001cfabbeeda5si3299800plh.291.2023.12.01.03.59.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 03:59:31 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:8 as permitted sender) client-ip=2620:137:e000::3:8; Authentication-Results: mx.google.com; dkim=pass header.i=@bootlin.com header.s=gm1 header.b=aknrodqp; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:8 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=bootlin.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by fry.vger.email (Postfix) with ESMTP id 7545881BE81C; Fri, 1 Dec 2023 03:59:28 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at fry.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378629AbjLAL7E (ORCPT + 99 others); Fri, 1 Dec 2023 06:59:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378625AbjLAL7D (ORCPT ); Fri, 1 Dec 2023 06:59:03 -0500 Received: from relay4-d.mail.gandi.net (relay4-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::224]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A502AD48; Fri, 1 Dec 2023 03:59:09 -0800 (PST) Received: by mail.gandi.net (Postfix) with ESMTPSA id D652FE000A; Fri, 1 Dec 2023 11:59:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1701431948; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=qo1HW2RbWjsXr4I+NcN2RIgPr28kFzpwIsFkOjIb1/c=; b=aknrodqpRG28RyGgGka+xHoWLNUVL0+VgCHlH3dl8FAyFZ4vciFVq5dxSMV8DE6pj6Yg4N 67gm8OISrrdTcXYKjI3Mvo9GQo+dIu89iK6JJwA7HFtKmS0uhGQ/35nkgJBfREPcFQHUGE NbX+2R73R2fuUYLP2zkoFL4VeJcy7z8c7eD8Evik1rI+C3KPcOjIycS9qkEAkeC4i20W2T AkL+F14wiuquY3YC660bGdvSCx3HtkT0uwAt8cZA8unonCahx4l7nWPqSK0m8/fwj+snm3 8RVzvODTGH4NSO1P7g0IfPWwV6yo2PWQ6UbrcbOGsKxmE3QI5GCUxBSlcaXxkQ== Date: Fri, 1 Dec 2023 12:59:04 +0100 From: Miquel Raynal To: Frank Li Cc: alexandre.belloni@bootlin.com, conor.culhane@silvaco.com, imx@lists.linux.dev, joe@perches.com, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, zbigniew.lukwinski@linux.intel.com, gregkh@linuxfoundation.org, jirislaby@kernel.org, linux-serial@vger.kernel.org Subject: Re: [PATCH v5 7/7] tty: i3c: add TTY over I3C master support Message-ID: <20231201125904.6c8128b1@xps-13> In-Reply-To: <20231130224408.3591288-8-Frank.Li@nxp.com> References: <20231130224408.3591288-1-Frank.Li@nxp.com> <20231130224408.3591288-8-Frank.Li@nxp.com> Organization: Bootlin X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-GND-Sasl: miquel.raynal@bootlin.com X-Spam-Status: No, score=-0.9 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on fry.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (fry.vger.email [0.0.0.0]); Fri, 01 Dec 2023 03:59:28 -0800 (PST) Hi Frank, Frank.Li@nxp.com wrote on Thu, 30 Nov 2023 17:44:08 -0500: > In typical embedded Linux systems, UART consoles require at least two pin= s, > TX and RX. In scenarios where I2C/I3C devices like sensors or PMICs are > present, we can save these two pins by using this driver. Pins is crucial > resources, especially in small chip packages. >=20 > This introduces support for using the I3C bus to transfer console tty dat= a, > effectively replacing the need for dedicated UART pins. This not only > conserves valuable pin resources but also facilitates testing of I3C's > advanced features, including early termination, in-band interrupt (IBI) > support, and the creation of more complex data patterns. Additionally, > it aids in identifying and addressing issues within the I3C controller > driver. >=20 > Signed-off-by: Frank Li > --- >=20 > Notes: > Change from v4 to v5 > - send in i3c improvememtn patches. This is not what I said, I believe this patch and the previous patch should be sent separately. Thanks, Miqu=C3=A8l