From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DABB013C9B3; Tue, 18 Jun 2024 06:59:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.153.233 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718693969; cv=none; b=gRCXde3csUJyJ2XuRGMGctb9DCLq9h37820xwzedJ/3SoubihXChHedLpaBNraAWnObbgxUBHPcE17H3gAZSuNUg3LF0jpg7AtOHQbdqCfeAsuLZolhAAW+P6MLMxqIuf8vUptUTXxO+9m/WUQO+FyKTs4dksx1hXuT3xs5XqjM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718693969; c=relaxed/simple; bh=3mK4TsHTIPeZapcY9c5aW4prx8bcHLdsxmGHIyRcCK0=; h=Date:From:To:CC:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=KOm1ktj7CPAdN5bzxAluOJ1KK3oxX5tZUUG1GB/fggpezJTN/h6sIHMMiycXgG4/P0FrzUfzqSRw9BakqUEQecnchWUxS7v0ty1FhwKWiu9d1KT7lYkjFPkF7UuyBugGIXwMy24f7c7mMKP39QyUzxsxI/fr/3rdBxec8b1rMS4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=K96M58I3; arc=none smtp.client-ip=68.232.153.233 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="K96M58I3" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1718693967; x=1750229967; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=3mK4TsHTIPeZapcY9c5aW4prx8bcHLdsxmGHIyRcCK0=; b=K96M58I3v8riDvnkD3mT3oqLPIFVbrDfcWwFwN/u8KPp4K01qd3UgaJn 1J5eD56irh7RTfGiCWKSMUaK8C+IJmIUv5jaWAnxxoI/gHQAD7G/0LMxm 1bU89C4mJhxt6irG9MLJDBSSPPH4zsG2RY3rmXsUHMhaRsSM1S/C62MkW vJQQFTeOTZfzC0txsprMZd34Aogn6GyfqlGAxVuhWQZuzQYKWCZ0CFlxg mQ8R0IHD/HN2uYZcErVHIt0qSgMCzZaj9vjzA3Unvw6xRzNJsFWnpv7q6 wI/m/v/fmiF5euhf4m63CxjJX2TVwYb1biWSEE8C8NQIdpANdiad/swa9 A==; X-CSE-ConnectionGUID: z9K4V9M6RvG3elklgVnlnw== X-CSE-MsgGUID: /nE/O9yjS8y1iiBhZ+9ZHA== X-IronPort-AV: E=Sophos;i="6.08,247,1712646000"; d="asc'?scan'208";a="258886760" X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa5.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 17 Jun 2024 23:59:26 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Mon, 17 Jun 2024 23:59:10 -0700 Received: from wendy (10.10.85.11) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35 via Frontend Transport; Mon, 17 Jun 2024 23:59:07 -0700 Date: Tue, 18 Jun 2024 07:58:49 +0100 From: Conor Dooley To: Yangyu Chen CC: Conor Dooley , Jisheng Zhang , Yixun Lan , , Conor Dooley , Palmer Dabbelt , Paul Walmsley , Samuel Holland , Anup Patel , Rob Herring , Krzysztof Kozlowski , , Linux Kernel Mailing List , Jesse Taube Subject: Re: [PATCH v1 0/9] riscv: add initial support for SpacemiT K1 Message-ID: <20240618-pacifism-defendant-2a042a7fe1b9@wendy> References: <20240616-exorcism-computing-e11e26084a62@spud> <20240616224811.GC3983622@ofsar> <20240617-synapse-carmaker-0a59c7c6edb7@spud> <20240617-connected-avoid-82f0bdc05cdf@spud> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="YwBUjE9FTTi9maDS" Content-Disposition: inline In-Reply-To: --YwBUjE9FTTi9maDS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jun 18, 2024 at 01:42:34AM +0800, Yangyu Chen wrote: >=20 >=20 > > On Jun 18, 2024, at 01:14, Conor Dooley wrote: > >=20 > > On Tue, Jun 18, 2024 at 12:39:30AM +0800, Yangyu Chen wrote: > >>=20 > >> The vendor uses a special intel pxa uart driver, marked deprecated > >> in the kernel and incompatible with ns16550. If we use ns16550 in > >> the dt, the behavior of uart is like the uart has no interrupt and > >> stops working permanently when fifo overruns, making many developers > >> not know how to start unless they use the SBI HVC console, which > >> needs to turn on CONFIG_NONPORTABLE. > >=20 > > This I just do not understand. Why did they use this IP? Is it free? > > Did they use it before for something else? It's a rather strange design > > choice to me. >=20 > I don't know either. However, PXA is a subfamily of XScale. The > kernel also probed the UART as an XScale. So, using XScale compatible > string is OK. Using a fallback to an Xscale compatible is okay, FTFY ;) --YwBUjE9FTTi9maDS Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRh246EGq/8RLhDjO14tDGHoIJi0gUCZnEwHAAKCRB4tDGHoIJi 0to+AP9w3gnQ362y8MnFZcbfQCKFvkpQBLoqodJyHtdQJpq/GAEA0V0/yvJzPuS8 8hGxhLKG89Dg+3IulVD5SK6iFT5/EAU= =QSkx -----END PGP SIGNATURE----- --YwBUjE9FTTi9maDS--