From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Thu, 04 Mar 2021 14:07:11 +0100 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1lHnh9-0001Bo-Ig for lore@lore.pengutronix.de; Thu, 04 Mar 2021 14:07:11 +0100 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lHnh8-00028D-Oo for lore@pengutronix.de; Thu, 04 Mar 2021 14:07:11 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=desiato.20200630; h=Sender:Content-Transfer-Encoding :Content-Type:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Cc:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=erj/0RiBNzqKpRyDqydOUf2zHYL9FTlVp0opoOeaqPI=; b=JGTh+YSnDuY12NYvyBbJ0JCS9 t3IJ6WYS+s6T6zS4Z/6XGvN3FfzWGq8w0wfYpbTo1R3Zr3D96d+S5Ojhcu4N7Ay2DLKnrUBNQOZIX 3QvYyMnGECwbug3R2NZ0VDl+QvoEYlqrmQEzmHCQ6+/n2ccXs4k/djagOAmIk2eLhG7UxtFxSVM/k xi9/UCUq448OhkrJ49sTvJRYnJ6MvtXUOjSjcOrtt0pkCJWIO6tVETPfDXGHw8I4tEHIHxLSVUpFh 0eu4YEuCMePvWeMcSizRn02LslIX+ZBT2m9oRXj5YQYg6fUpgFHdeJ89VxmkxvZU1eFc5ePdaTqrE miR+wRtGw==; Received: from localhost ([::1] helo=desiato.infradead.org) by desiato.infradead.org with esmtp (Exim 4.94 #2 (Red Hat Linux)) id 1lHndI-008ghT-Sa; Thu, 04 Mar 2021 13:03:14 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by desiato.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lHnZk-008gDq-Ut for barebox@lists.infradead.org; Thu, 04 Mar 2021 12:59:35 +0000 Received: from gallifrey.ext.pengutronix.de ([2001:67c:670:201:5054:ff:fe8d:eefb] helo=[IPv6:::1]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1lHnZj-0001Fv-Tp; Thu, 04 Mar 2021 13:59:31 +0100 To: "Barbier, Renaud" , "barebox@lists.infradead.org" References: From: Ahmad Fatoum Message-ID: <092dbc44-2081-ef3b-0fd7-25d1b9da72d3@pengutronix.de> Date: Thu, 4 Mar 2021 13:59:31 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.0 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2001:8b0:10b:1:d65d:64ff:fe57:4e05 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-3.4 required=4.0 tests=AWL,BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.2 Subject: Re: Uart set up in PBL X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) Hello Renaud, On 04.03.21 13:28, Barbier, Renaud wrote: > Looking at many ARM platforms I see the UART is set in the PBL. Two kinds of UART are set up in PBL: - low level debug: DEBUG_LL -> This is controlled via Kconfig and thus affects all boards. Not meant for production use , but for very early debugging - PBL console: pbl_set_putc -> This affects only a single board and each board can decide how to set up UART beforehand. This is for when you want regular output in PBL (e.g. because you chainload from MMC). > I guess the baud rate is fixed.> I am looking into a way to make the baud rate configurable. For non-PBL, you got proper UART drivers, which can have their baud rate configured via the baudrate device parameter, e.g. serial1.baudrate=9600. This can come from a non-volatile variable. > Would it possible from the PBL to read the "baudrate" variable from the environment? Normally, you would want to avoid doing anything, but the bare minimum from PBL. Does the baudrate device parameter work for you? Cheers, Ahmad > > Cheers, > Renaud > > > _______________________________________________ > barebox mailing list > barebox@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox