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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 BF67AC47255 for ; Tue, 12 May 2020 02:00:18 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4CB9820675 for ; Tue, 12 May 2020 02:00:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="q+DNTToN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4CB9820675 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 49LgxD2X7rzDqmb for ; Tue, 12 May 2020 12:00:16 +1000 (AEST) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 49LgsZ1zwZzDqpB for ; Tue, 12 May 2020 11:57:06 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=q+DNTToN; dkim-atps=neutral Received: by ozlabs.org (Postfix) id 49LgsX5r2jz9sSW; Tue, 12 May 2020 11:57:04 +1000 (AEST) Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 49LgsX2JJwz9sRY; Tue, 12 May 2020 11:57:04 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1589248624; bh=ORN8HryrSgbZGLzC/893lA1G+tC/DDpQ79ckFy+UR8U=; h=From:To:Subject:In-Reply-To:References:Date:From; b=q+DNTToN2la2jNK0pgNsZojp3s48IJwSpy2TCSElAE69Hs6AjhWRNjrg2ymZDBDYy pa5RMvt68LJH5H9xXfLRZnLzn+hOvQnpsJV8XVdyzL1oEsJYstHQYbmqv4oEOp87PL Yob52vAylrLPLbnTiBsIXANNcPd41QaOULtfXcqtGlP2EXJUPH8S+D085eLUBc2XTt ovoLX64PGPkQTDAXxeO48RlX19IeASb2tb/3WFprjAprMcSPeF6reAtqUjTu8/5Uk2 7/vNCjX/vk0/9Z5thUl4ycSd2VKUNSUMlMzU9m/WGny2l6UAbuQ6j6Cb8RJ69yDlLI Zatli5+67v1/g== From: Michael Ellerman To: Paul Mackerras , linuxppc-dev@ozlabs.org, Benjamin Herrenschmidt , Michael Neuling , Anton Blanchard Subject: Re: [PATCH RFC 3/4] powerpc/microwatt: Add early debug UART support for Microwatt In-Reply-To: <20200509050340.GD1464954@thinks.paulus.ozlabs.org> References: <20200509050103.GA1464954@thinks.paulus.ozlabs.org> <20200509050340.GD1464954@thinks.paulus.ozlabs.org> Date: Tue, 12 May 2020 11:57:24 +1000 Message-ID: <87pnb9c3uj.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Paul Mackerras writes: > Currently microwatt-based SoCs come with a "potato" UART. This > adds udbg support for the potato UART, giving us both an early > debug console, and a runtime console using the hvc-udbg support. Can y'all get a real UART? There's more code here than in the platform itself. cheers