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 B6B2AD79767 for ; Sat, 31 Jan 2026 10:13:11 +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-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=qsn6do0H2U9fqgk1QpalGugK1rhqoeeLKs4fiTKdUyA=; b=Hb/aT+NbwII6c4SKZzDiRnGaOd /bg7ZBHwteH5szWBCPy0QWHN3B+S2zTtrh5NNFfYbroShleWzHurM/3Q6cZm7soStp/V2LZx5Na+h PIfjauYxRaxeOoWyKgmdztaB3Vo42Vo4lYjUD7KCnlMzWgfqpCIypMlDlqgeakl68lKZkfkO/ABTC yz8Fa3VZ76Ms0h7OphhfXILXxrnjwABfCGoYM4wh8N2Yjn8CEHfX60EYS20wiGVxuVhizJNaByxjp vi0fnCZswioi1almQbgntwzRKBOcDhoh0bbFkAWoN0PtcbqszrML5dXtDedIosFUMda3SeBCK5/UN UcNj7oHQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vm7yS-00000002Tk1-0uBD; Sat, 31 Jan 2026 10:13:04 +0000 Received: from mgamail.intel.com ([192.198.163.15]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vm7yP-00000002TjD-3aMP for linux-arm-kernel@lists.infradead.org; Sat, 31 Jan 2026 10:13:03 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1769854381; x=1801390381; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=bDV6Ml2elbMroNLtxz9Br8GhUvJQ9gJTZXYx2UqJoMM=; b=W0fnUXBkt09Xw3ZeEWKuTJez7pA9idr5OIt2dHVHPGPYEH6CmdHJt5lH u8jT1wm6u4chyhQhIvjA3rbMnOebyPmVJGCXnTcFhz88XV1l+/U7M/UF4 uBjlyluOa26jr1+5DI29W2yjpM9qohpDEVYJx+sdLtfazQ+cKyg0D2KlO mnj/9whalVjkvnM8zvBuAKtJL/ZllVDEfEYnt6IRg7Y8/uiQd7Kr6c2B+ JrTPBlz6+AmQMgLwo3hrIVKmrkbeHUVN/tNVbuqzJjosDsDlUhEO2hJTY TrMGGyYcHpAl1G8cxRAMVn+SvbPvMtNPpzhDMy3Z5YGWNBzB504Dc5DDy g==; X-CSE-ConnectionGUID: aZdcuyziQ2uW+RILYQKG+Q== X-CSE-MsgGUID: F4ZDf1AbQS2LDt3WaOVgxg== X-IronPort-AV: E=McAfee;i="6800,10657,11687"; a="71176680" X-IronPort-AV: E=Sophos;i="6.21,264,1763452800"; d="scan'208";a="71176680" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jan 2026 02:13:00 -0800 X-CSE-ConnectionGUID: Y9P1ZjhcQLa7lIeELafqxQ== X-CSE-MsgGUID: EyfjgURpSt+yQA0l0FBXSA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,264,1763452800"; d="scan'208";a="209456821" Received: from ijarvine-mobl1.ger.corp.intel.com (HELO localhost) ([10.245.244.97]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jan 2026 02:12:59 -0800 Date: Sat, 31 Jan 2026 12:12:56 +0200 From: Andy Shevchenko To: Abdurrahman Hussain Cc: Andrew Lunn , Michal Simek , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH v7 1/6] i2c: xiic: skip input clock setup on non-OF systems Message-ID: References: <20260129-i2c-xiic-v7-0-727e434897ef@nexthop.ai> <20260129-i2c-xiic-v7-1-727e434897ef@nexthop.ai> <2428D892-89F9-4013-9681-AD9BD76B0874@nexthop.ai> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <2428D892-89F9-4013-9681-AD9BD76B0874@nexthop.ai> Organization: Intel Finland Oy - BIC 0357606-4 - c/o Alberga Business Park, 6 krs, Bertel Jungin Aukio 5, 02600 Espoo X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260131_021301_922147_21B4B4BF X-CRM114-Status: GOOD ( 13.80 ) 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 Thu, Jan 29, 2026 at 03:29:45PM -0800, Abdurrahman Hussain wrote: > > On Jan 29, 2026, at 2:43 PM, Andrew Lunn wrote: > > On Thu, Jan 29, 2026 at 09:43:13PM +0000, Abdurrahman Hussain via B4 Relay wrote: > >> The xiic driver supports operation without explicit clock configuration > >> when clocks cannot be specified via firmware, such as on ACPI-based > >> systems. > > > > Are you saying it is technically impossible to specify a clock in > > ACPI? > > > > Maybe a more accurate would be: > > > > The xiic driver supports operation without explicit clock > > configuration when the clocks are not specified via firmware, such as > > when the ACPI tables are missing the description of the clocks. > > Actually, ACPI (since 6.5) added a ClockInput() macro that can be added to > _CRS of a device node. The ACPI subsystem in kernel could parse these and > convert into proper clocks integrated with the CCF. But, AFAIK, this idea was > rejected in the past. Rejected by which side? CCF? Because specification still has that. -- With Best Regards, Andy Shevchenko