From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D4840264603; Mon, 10 Feb 2025 20:40:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739220043; cv=none; b=RzPtXDWAQUzpfwg66MepLVPgj2KoafCpaNnZW6UH/gbyVTptdJWG+NDmxw67U/tgrSTAs94BQkLnfMrNXfCSzqKZK0r4jvIo+zrKwfUTLKpOLb1rpK+RYXO+di48mr+35rXIC4uUL60XQdTPx474lMzWZiaE6z3+Uoria0O0/R4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739220043; c=relaxed/simple; bh=EOrJyLpi9o+aX1l7UhQTaefPqHhchUVGMwHkMkiXSo0=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=HBGrbgjCkavlWao13qnysPLBQ3557dw6oLlNFxUksyBBCDWSBdeAyruFYvCQlFqVE2jHWH641LPfZOM3V4p88Ii8afDMg+YseCriuTpcTV/Pre6pykffuup7WqNSxyJE+7Hnockbt483sNAEOGmjoiNgfdm9EkMoc/U4gy2BlrA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=e9tUmVtx; arc=none smtp.client-ip=209.85.128.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="e9tUmVtx" Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-4394a0c65fcso10524685e9.1; Mon, 10 Feb 2025 12:40:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1739220040; x=1739824840; darn=vger.kernel.org; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:from:to:cc:subject :date:message-id:reply-to; bh=EOrJyLpi9o+aX1l7UhQTaefPqHhchUVGMwHkMkiXSo0=; b=e9tUmVtxwSDk3ZUC8j3JvxvRwwVv9/HlSVFRe74/Zr/HZNbP52+HHcegZNfkihyPb3 3feTsE6BWZqRsC4cKPTqZpO597WUDPY9cYkZP4bDOGBWD82FoUnBwmxkHvYB8SL7Obh7 iVaqELUZ2XNds7uwtGq1zQ+xUiNXOKUytOY4OTIST154Izz5+VUhmGPEnYcmHLwH9JKq uklRDzpYenGaGSdFpwSCc7iffDJX1qeXG9vExDZAOVc6pLgiU4EOM5qEUGIVTlirUFCe v3HnERWYgIV8GzPjIPvmczH0RZzgMm7YjcKcy3GqbgdV392ZobidumqHRQ36r1/wWd7E +qNw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1739220040; x=1739824840; h=mime-version:user-agent:content-transfer-encoding:references :in-reply-to:date:cc:to:from:subject:message-id:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=EOrJyLpi9o+aX1l7UhQTaefPqHhchUVGMwHkMkiXSo0=; b=CWjROOaPHNpJOisczIqCFnBWt1FUcMLIsb5IdbcVbLu02/MHYCoqlyL0KvrqUVgGAN tNvRxmW+4K76jxQzKAQmkODf/f76ptjDCA/3bpq03TvBdWW8i5sCLu/9xwXfV/9TpsD7 9rnN7gwGYls8UGsAVGnNAm/hr6g0H8TaxN/Na7zfXkB0gZOxr/wBit+1+nk/IE3ph8lJ s8lwXjh3JCTB/JdqJ0deCE3TDfPyfY1m6P00ZYi+WYmNM4hMN6Ua5EDIpgRjEon9dvLs hyhbdL5dLLJJZEjPhdtwiSp5//MsDSuqSrD668u55h/UcWKP98mPrI+tUgx1KEFBSdg4 FQ4w== X-Forwarded-Encrypted: i=1; AJvYcCU3eMBHY3IZRp5iwl1beBrdfUxsSH3l8/+bLdWIcvuvkyKC2art4f/LcmK8X/Ap1Rd+SiBbulM29gY=@vger.kernel.org, AJvYcCUXanFs6vh+fsAYYnwxpifA7cwCqxHCxTdHGo8Hr2Z50GT+Qz1fUPCIlyexu2AdaFWycMtyW0R3czC+@vger.kernel.org X-Gm-Message-State: AOJu0YzeQFKFvILzR0Pxw71Za1bgc9C0dGlYP9pB6+Nd8lGhvSFtozKB 8JmjOrZ+k0Y0B9jThGSVboA3ifsNpnF+PvdwppiW7L0HdZEI3Xm9 X-Gm-Gg: ASbGncv+yp5DF+HPnVbsRo+hpTIf6BT+Xand3xdJqzdAtVrH+ZS9qYowpvb5+WeLaA0 eSC3WzK4ubTi/VEGWuF4WCYd+Gt/fQgDTa5pjDvNZ7gahmoHMIRuTuNEHvotuZTu7BC/IIz+pt9 TWZNoTpJORQ39bJ+UdQtJtvS78NFCS8vvIzg1vK/Q882wxngZII3vO14uhRDP0cHjMp4SB1qWpZ tWb0644JSH+cc7qQbj9krDpfadEgHF5Xg5QC1mpL2iUFO7VHuJbCAVrgQeFuyNb2HWvEEsuihxP rNnJypfqB8HR9VFMyXdLQm93qahbVe8O X-Google-Smtp-Source: AGHT+IGANzhAWt5IwkQhTvn7xGsdCRHvYJ4peTBZKCls6+W0CRyuS6ldpr+5UQbejq+0t4DSbFyanQ== X-Received: by 2002:a05:600c:b9b:b0:439:4637:9df with SMTP id 5b1f17b1804b1-43946370d05mr42704375e9.3.1739220039819; Mon, 10 Feb 2025 12:40:39 -0800 (PST) Received: from giga-mm.home ([2a02:1210:861b:6f00:82ee:73ff:feb8:99e3]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4390daf44f3sm194823195e9.29.2025.02.10.12.40.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2025 12:40:39 -0800 (PST) Message-ID: Subject: Re: [PATCH 06/10] dt-bindings: mfd: syscon: Add Cvitek CV18xx rtcsys core and ctrl compatible From: Alexander Sverdlin To: Krzysztof Kozlowski , soc@lists.linux.dev Cc: Chen Wang , Inochi Amaoto , linux-pm@vger.kernel.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, Haylen Chu , linux-arm-kernel@lists.infradead.org, Sebastian Reichel , Arnd Bergmann , Philipp Zabel , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Lee Jones Date: Mon, 10 Feb 2025 21:40:36 +0100 In-Reply-To: References: <20250209220646.1090868-1-alexander.sverdlin@gmail.com> <20250209220646.1090868-7-alexander.sverdlin@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.2 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Mon, 2025-02-10 at 21:30 +0100, Alexander Sverdlin wrote: > On Mon, 2025-02-10 at 09:48 +0100, Krzysztof Kozlowski wrote: > > On 09/02/2025 23:06, Alexander Sverdlin wrote: > > > These syscon blocks will be used for CV18xx reset driver. > >=20 > >=20 > > No, implement proper reset block instead of abusing syscon. >=20 > I don't think it's an abuse... You need to look into the corresponding TR= M [1]. >=20 > 4 bits I need to tweak (and one magic number into unlock register) are ra= ndomly > placed at random memory adresses and otherwise adjacent bits have random > unrelated functions from random unrelated subsystems. > If it's not syscon, I don't know what it is. >=20 > It has a reset HW block, as you and Inochi have correctly pointed out, fo= r other > purposes, for resetting the SoC IP blocks. The overall SoC reset is compl= ete > mamba jamba. >=20 > I was thinking now about a syscon driver, which will register_restart_han= dler()... Sorry, I meant "MFD" driver... > Inochi, do you have more insights into it? You've mentioned RTC and 8051.= .. > Looking into TRM I don't get it, why a thing blessed to do all the housek= eeping > (and called "System Controller" in imx8, for instance) happen to have RTC= _ prefix... > Would RTC subsystem maintainer be happy with a monster driver which has t= ies > to all other subsystems? >=20 > [1] https://github.com/sophgo/sophgo-doc/releases/download/sg2000-trm-v1.= 01/sg2000_trm_en.pdf > ("rtc_ctrl_unlockkey", "rtc_ctrl0", "RTC_EN_WARM_RST_REQ", "RTC_EN_PWR_CY= C_REQ"). --=20 Alexander Sverdlin.