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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 31C91C021B8 for ; Wed, 26 Feb 2025 21:30:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=hneAs3qqmmFkAYm4vdXK/LFoiNlpknYzzGASWg9v3oI=; b=2phjKu4kMvxmHm/KDTm7umOML0 MO8G+eBOwulJ8qCBQQPqGGzIo3/1o6+0RPAC/8vK4ODNpLKU6pTivXS3ImqwpyynsugzTO90rJB0r zulDdneei/LzmMPh7pyzp0q8KOoUyPXjJ0oTUDK/fydcF5JZoakQXbuzc//Xu4YwI/M8DdSXLF0gY +twi5RnRk8ehDkQ7H3RqqUyv3WqxGb8EqMeKn9K7VFvLducS+lktJGpYkwlTeMKuOne0DkiqLnsWk Spv6tl6DBtif5hO+L3iFrMEVclDiSz/eEggqKPJ1AkJbxjMqbpNmOp1T4OriZmhA5Se+uGu+fuQvp ZymeHMow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tnOyc-00000005T4W-37J7; Wed, 26 Feb 2025 21:29:58 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tnOwJ-00000005Ssn-0HDt for linux-arm-kernel@lists.infradead.org; Wed, 26 Feb 2025 21:27:37 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id A77355C6076; Wed, 26 Feb 2025 21:26:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BCCDFC4CED6; Wed, 26 Feb 2025 21:27:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740605254; bh=QBF3gK7K+8XyqisYuWi4FlxcFrpOykFsHbOMdaD+jO8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Cy1LDM2s4HzDSgUGAmgr/JODHJxrsVjMMNP/47jQ1He4q+kNlS0GKvfQY2too9PXW yUrxWuKyke82/OhQjxZBrQ7WOEBymVivlqTaVZXTD/nA5/M2EGz2BOu4Czy9QkHeWq B9UpDihHPXzd0gmJYpWlSQxq1cxiriOkoeOGox//dGyotChkUWCwnD0QTz919exoLx hhCXg85BQvMCbUriEhSDswVwvL7bObC5J2UeCTm+mZq4Ton1yjlfz+Z2yjK6EJOx0x Wvqa7TmHAMWxCzqqmpzo6FVjNclNKEmBs/bo1saxMBnPGZ7PACJM1uXMEkxlGRgmxx DdO4Z8rL3LuTg== Message-ID: <1de58672-5355-4b75-99f4-c48687017d2f@kernel.org> Date: Wed, 26 Feb 2025 22:27:26 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 7/9] ARM: dts: stm32: add Hardware debug port (HDP) on stm32mp25 To: Alexandre TORGUE , Clement LE GOFFIC , Linus Walleij , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Coquelin , Bartosz Golaszewski Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org References: <20250225-hdp-upstream-v1-0-9d049c65330a@foss.st.com> <20250225-hdp-upstream-v1-7-9d049c65330a@foss.st.com> <418a80a9-8c08-4dd1-bf49-1bd7378321aa@kernel.org> <988667a4-4bc0-4594-8dfd-a7b652b149b2@foss.st.com> <55beb3e7-65ac-4145-adae-fb064378c78d@kernel.org> <8cdc7e52-f9e2-4fc9-be68-0dd72a25ee1b@foss.st.com> <248f63ff-b6ec-4f58-8a96-7aee2fcd6038@foss.st.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250226_132736_049845_AB8065DA X-CRM114-Status: GOOD ( 12.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 26/02/2025 17:54, Alexandre TORGUE wrote: >>>> But, if it's not clean to do it in this way, lets define SoC compatible >>>> for any new driver. >>> >>> Compatibles are for hardware. >>> >>>> For the HDP case it is: "st,stm32mp157" and used for STM32MP13, >>>> STM32MP15 end STM32MP25 SoC families (if driver is the same for all >>>> those SoCs). >>> >>> No, it's three compatibles, because you have three SoCs. BTW, writing >>> bindings (and online resources and previous reviews and my talks) are >>> saying that, so we do not ask for anything new here, anything different. >>> At least not new when looking at last 5 years, because 10 years ago many >>> rules were relaxed... >> >> So adding 3 times the same IP in 3 different SoCs implies to have 3 >> different compatibles. So each time we use this same IP in a new SoC, we >> have to add a new compatible. My (wrong) understanding was: as we have >> the same IP (same hardware) in each SoC we have the same compatible (and >> IP integration differences (clocks, interrupts) are handled by DT >> properties. > > Just to complete, reading the Linux kernel doc, as device are same we > will use fallbacks like this: > > MP15: compatible = "st,stm32mp151-hdp"; > MP13: compatible = "st,stm32mp131-hdp", "st,stm32mp151-hdp"; > MP25: compatible = "st,stm32mp251-hdp", "st,stm32mp151-hdp"; Yes, this looks correct. Best regards, Krzysztof