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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB6AAC4321E for ; Mon, 28 Nov 2022 21:05:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234410AbiK1VFu (ORCPT ); Mon, 28 Nov 2022 16:05:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41304 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234415AbiK1VF2 (ORCPT ); Mon, 28 Nov 2022 16:05:28 -0500 Received: from gloria.sntech.de (gloria.sntech.de [185.11.138.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A95CC2F39A; Mon, 28 Nov 2022 13:05:18 -0800 (PST) Received: from ip5b412258.dynamic.kabel-deutschland.de ([91.65.34.88] helo=diego.localnet) by gloria.sntech.de with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1ozlJN-00086j-Tx; Mon, 28 Nov 2022 22:05:09 +0100 From: Heiko =?ISO-8859-1?Q?St=FCbner?= To: Conor Dooley , Guo Ren Cc: Samuel Holland , Chen-Yu Tsai , Jernej Skrabec , linux-sunxi@lists.linux.dev, Palmer Dabbelt , linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, Krzysztof Kozlowski , Rob Herring , Jisheng Zhang , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Andre Przywara , Albert Ou , Anup Patel , Atish Patra , Christian Hewitt , Conor Dooley , Heinrich Schuchardt , Linus Walleij , Paul Walmsley , Stanislav Jakubek Subject: Re: [PATCH v2 11/12] riscv: Add the Allwinner SoC family Kconfig option Date: Mon, 28 Nov 2022 22:05:08 +0100 Message-ID: <4413987.e9J7NaK4W3@diego> In-Reply-To: References: <20221125234656.47306-1-samuel@sholland.org> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Am Sonntag, 27. November 2022, 12:31:15 CET schrieb Guo Ren: > On Sun, Nov 27, 2022 at 12:36 AM Conor Dooley wrote: > > > > On Fri, Nov 25, 2022 at 05:46:55PM -0600, Samuel Holland wrote: > > > Allwinner manufactures the sunxi family of application processors. This > > > includes the "sun8i" series of ARMv7 SoCs, the "sun50i" series of ARMv8 > > > SoCs, and now the "sun20i" series of 64-bit RISC-V SoCs. > > > > > > The first SoC in the sun20i series is D1, containing a single T-HEAD > > > C906 core. D1s is a low-pin-count variant of D1 with co-packaged DRAM. > > > > > > Most peripherals are shared across the entire chip family. In fact, the > > > ARMv7 T113 SoC is pin-compatible and almost entirely register-compatible > > > with the D1s. > > > > > > This means many existing device drivers can be reused. To facilitate > > > this reuse, name the symbol ARCH_SUNXI, since that is what the existing > > > drivers have as their dependency. > > > > > > Reviewed-by: Heiko Stuebner > > > Tested-by: Heiko Stuebner > > > Signed-off-by: Samuel Holland > > > --- > > > > > > Changes in v2: > > > - Sort Kconfig as if we had done s/SOC_/ARCH_/ for future-proofing > > > > > > arch/riscv/Kconfig.socs | 9 +++++++++ > > > 1 file changed, 9 insertions(+) > > > > > > diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs > > > index 69774bb362d6..4c1dc2ca11f9 100644 > > > --- a/arch/riscv/Kconfig.socs > > > +++ b/arch/riscv/Kconfig.socs > > > @@ -26,6 +26,15 @@ config SOC_STARFIVE > > > help > > > This enables support for StarFive SoC platform hardware. > > > > > > +config ARCH_SUNXI > > > + bool "Allwinner sun20i SoCs" > > > + select ERRATA_THEAD if MMU && !XIP_KERNEL > > depend on MMU > depend on !XIP_KERNEL > select ERRATA_THEAD That sounds like a better variant. The D1 / C906 _needs_ the errata for the memory handling and the other alternative constraints require the !XIP With the select, a xip-kernel would not boot at all on a D1 Heiko