From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 053771D61AC; Fri, 3 Jan 2025 17:14:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735924471; cv=none; b=i7QyxNx4RnNH+eg7NBaxWbs8g5TfRrBdk0/LBBIeeGR2EnEqGNLKc6S11EZ8a2uaftjjVP/E+C7oa3cD+0mtIJDpRDKyVkZyaQ4BJ9KQ/fC2jQ7ZkVYw0qHNb53IMsW8mTppyxf4lZIbDV5JUcclah9lklN7hbxsvWu6k85znKY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735924471; c=relaxed/simple; bh=c4k6wqELijNCXeRz5BTT6d9/N4pmdVhomg3n3APz0UU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=MBJty6a9Hr5af4UFZJeRWD0nVofT/8yQDLN7tVLNX3WqvhTXdBPyKBTrj2fuydi2rQGBdViT6ON4FOlq6+B/7ghdye2m4zXOD1/ZxtzSyG13nTV+ovFY9pPEzWzlrxHP6oJuRRdLS+RAZ8qbLS0Tvt5ZRCi+qt+6J3CWf11CJWo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WcioWhqG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WcioWhqG" 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 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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