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 99096CF395A for ; Thu, 19 Sep 2024 14:59:14 +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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=yU39HgeC8miNncNmKIN6bgc/cSHE+WoMc/gAsNV0vxs=; b=04pS+AuX1YMPRd1eyE79y0r+kJ 02Af+Oa1EvuXnOj9eYR1uTpVFiV5/O0CcskOjaqcqxjWCFe2FTZkeHQcL3DuMRFYwAwBf8pufW5Rk E3Lf1oBsKSiGmCs9wUno9kqlCjgQ6xMNkENyIcLptptV582iAx+VkG0UwabcjzcTgRIGsAeeFLx1c kBGSpIv4YDPhKMOmB9PFad0d96wq3iXd5bO4keWu7kuxYO2bfSGYN8PnbKJ1YASRubSCRQHUQMdfv HMtL6B/IKjvW+w76ctqzvQ7eAGc7z9pggc80au2I4eAmEK7MT19Bli8HWOLePYEX9sXc+UBZK0JiF ArxUUsZw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1srIca-0000000AUwf-1IHS; Thu, 19 Sep 2024 14:59:04 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1srIbT-0000000AUrj-18r3 for linux-arm-kernel@lists.infradead.org; Thu, 19 Sep 2024 14:57:57 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 57155FEC; Thu, 19 Sep 2024 07:58:23 -0700 (PDT) Received: from e130802.arm.com (e130802.arm.com [10.1.31.57]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 508033F71A; Thu, 19 Sep 2024 07:57:50 -0700 (PDT) Date: Thu, 19 Sep 2024 15:57:41 +0100 From: Abdellatif El Khlifi To: Krzysztof Kozlowski Cc: mathieu.poirier@linaro.org, Adam.Johnston@arm.com, Hugues.KambaMpiana@arm.com, Drew.Reed@arm.com, andersson@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org, liviu.dudau@arm.com, lpieralisi@kernel.org, robh@kernel.org, sudeep.holla@arm.com, robin.murphy@arm.com Subject: Re: [PATCH v2 1/5] dt-bindings: remoteproc: sse710: Add the External Systems remote processors Message-ID: <20240919145741.GA7940@e130802.arm.com> References: <20240822170951.339492-1-abdellatif.elkhlifi@arm.com> <20240822170951.339492-2-abdellatif.elkhlifi@arm.com> <20240919093517.GA43740@e130802.arm.com> <222b3b11-151a-4ad0-91ea-54ae8f280bcb@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <222b3b11-151a-4ad0-91ea-54ae8f280bcb@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240919_075755_375901_E617C629 X-CRM114-Status: GOOD ( 19.87 ) 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 Hi Krzysztof, > >>> + '#extsys-id': > >> > >> '#' is not correct for sure, that's not a cell specifier. > >> > >> But anyway, we do not accept in general instance IDs. > > > > I'm happy to replace the instance ID with another solution. > > In our case the remoteproc instance does not have a base address > > to use. So, we can't put remoteproc@address > > > > What do you recommend in this case please ? > > Waiting one month to respond is a great way to drop all context from my > memory. The emails are not even available for me - gone from inbox. > > Bus addressing could note it. Or you have different devices, so > different compatibles. Tricky to say, because you did not describe the > hardware really and it's one month later... > Sorry for waiting. I was in holidays. I'll add more documentation about the external system for more clarity [1]. Basically, Linux runs on the Cortex-A35. The External system is a Cortex-M core. The Cortex-A35 can not access the memory of the Cortex-M. It can only control Cortex-M core using the reset control and status registers mapped in the memory space of the Cortex-A35. I'll make sure this explanation is added to the binding and commit log for more clarity. Thanks for the suggestion regarding supporting multiple instances of the External system. I will send a new version shortly addressing all comments. [1]: paragraph 2.3, https://developer.arm.com/documentation/dai0550/D/?lang=en Kind regards Abdellatif