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 76836E7718F for ; Fri, 3 Jan 2025 17:15:57 +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=fU8Vb2pOnJet80GxKBDv5IEW+Ve/apD1i0jxT0RkWXw=; b=EAFYa63cI1cvoDIHTKJ5aspm1R akVcjp0TTilvg38o1rVXo7ZDqooyEpX603n18xGEaRkZIlT5tDJJAWg2ldkqyH6Mj11LEYSVwV3KD 7rZmkaQh5oXBGA8kRNtxxnGB23GglfNdJqfxiR95nOdvSXx4uhVoWKzBt7WkUUA63NSXWesu67oYP B5hS1SEAEVVcYnuNLcNdFWVP56RaiKIZDS3oBT+yQLqZ1L5MEo8qdTSWwNNnYLmN8bIUBxWAbqfE4 fp9eZeFoc8JzYifbxlqe11Zf04KGL3wUo4hgIFqXjv88jzYeQgMHf7laPDs1zXYcfdIQRTCfzUDov 67Jr2fiw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tTlH0-0000000DXAa-086u; Fri, 03 Jan 2025 17:15:46 +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 1tTlFn-0000000DX3V-268k for linux-arm-kernel@lists.infradead.org; Fri, 03 Jan 2025 17:14:32 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 8A99B5C5CFE; Fri, 3 Jan 2025 17:13:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 09EE3C4CECE; Fri, 3 Jan 2025 17:14:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1735924470; bh=c4k6wqELijNCXeRz5BTT6d9/N4pmdVhomg3n3APz0UU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=WcioWhqGydRwVZ46t8BYyhZERC03kXe8w8drsurPboEDsN/U3531M2xzcwMq2Ph7G syNylx+/E6301du9UN9ffvOHkcOxJqYfhrnfP7fQqzh84ZiX7siCRxkZYUY5EDBeCl +QL+T63mkO6ZrT07vQDzRGGe9LYj9IdSvfDnrUjP8COFQOpn2oSrGjkWVlWHmbJ9Wz lrVEHuZVcXwUl5wLV1Oo7FjMxQE09tLI0qRmBqeEcnB1UwZxDmes/3InIq6fkLjZMK ExttMQLelyEaiy9BrjAHQIS6deI7S/++/fCUEqcqghsHNpnbgvmq5lyt8pCvDHWPOF LQmoRVdPnsClQ== Message-ID: Date: Fri, 3 Jan 2025 18:14:23 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] dt-bindings: mfd: syscon: allow two reg regions for gs101-pmu To: Peter Griffin Cc: Rob Herring , Conor Dooley , Alim Akhtar , Krzysztof Kozlowski , Lee Jones , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, tudor.ambarus@linaro.org, andre.draszik@linaro.org, willmcvicker@google.com, kernel-team@android.com References: <20241213-contrib-pg-cpu-hotplug-suspend2ram-fixes-v1-v1-0-c72978f63713@linaro.org> <20241213-contrib-pg-cpu-hotplug-suspend2ram-fixes-v1-v1-2-c72978f63713@linaro.org> <1408dcd1-9a46-4cb9-8443-5aa51d61ed56@kernel.org> 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-20250103_091431_635553_F743E48F X-CRM114-Status: GOOD ( 14.97 ) 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 30/12/2024 10:10, Peter Griffin wrote: > >> >> Maybe you have here two devices, maybe only one. If it is only one, then >> it is not a syscon anymore, IMO. > > I was going to suggest modelling PMU_INTR_GEN as its own sycon node, > and then either: - > > 1) Updating exynos-pmu driver to additionally take a phandle to > pmu-intr-gen syscon, and register the hotplug callbacks. > > or > > 2) Create a new driver named something like exynos-pm or exynos-cpupm > which obtains the PMU regmap and also a phandle to PMU_INTR_GEN > syscon, and register the call backs. > > Is there any preference from your side over approach 1 or 2, or maybe > something else entirely? No preference, choose whatever results in simpler or more readable code. Option 1 assumes that exynos-pmu on GS101 will drop the "syscon" compatible, although it still might expose syscon through drivers. Just the standard binding syscon does not feel fit here. I don't have the hardware/user manual, so I don't know what PMU_INTR_GEN really is. GS downstream code has something like PMUCAL, which looks like separate device. Best regards, Krzysztof