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 99BE8EBFD18 for ; Mon, 13 Apr 2026 08:45:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To: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=YX2Hs1v+WFmJ95FZwFDNmFfPNm1EO/CmIqBJVpDA+GE=; b=cVaeDBTzubgFQX MPtGPaWvyAA0jwh3s50HQgvIuZhM4rhZ7ZkXNZES7yyW1T0iVblZqMtF9tA7gtWxPTktLPFlFlCYV KmJxg50WhW6OnGDmHxtqn7WTHPhoc81GVEaLwoYcvLJGsbFAxvCLNp+BiXDyD1EJ/EnbkpckAsv+E lSFzo4nowO/aqL4kfxwCnKAi/bvYd1wVkJLk5l/0GY3e4CB6J7hfKutiWQfj6sSHkykRK1mN+S4o3 E0D5RF9Qf8qW/eWAllx2FqKjc/RTbrFVAMs16RnM5QNeZ+fVrif62SVMquVDzqlgd5kh/GfzBDVRy CFMGuIDxgAoFgEutl5/w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCCv0-0000000FIGq-1VJA; Mon, 13 Apr 2026 08:45:18 +0000 Received: from smtpout-03.galae.net ([185.246.85.4]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCCuw-0000000FIGQ-2FBG for linux-i3c@lists.infradead.org; Mon, 13 Apr 2026 08:45:16 +0000 Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id DADB44E425B6; Mon, 13 Apr 2026 08:45:10 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id A7AD25FFB9; Mon, 13 Apr 2026 08:45:10 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 8C75A1045022E; Mon, 13 Apr 2026 10:45:03 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1776069909; h=from:subject:date:message-id:to:cc:mime-version:content-type: in-reply-to:references; bh=OAcntNoyq2S1cVcahMpYXYXm/PDPKoqEbIewOEJeAjU=; b=v4e01hq22EDC4/XGzWZC0N932NKIdtmZmagCALKezEcHag8wUtTAHANpsuIN11hBq+shHX G5sYe6E0JaLYgooFVPt4Wqgjue55ZOv6lyofk9DSX7fgBAofgaPetE0gCl7cvGg6sX0T4K pyzCiinPnNqL8O2DfpF6fgx629SxxgditTjsDVR9mwYD2Ksg0F0OV0f2WCO60Lf3W4ksRk HFGI/cGkhSGnTxSP1BHCtY6SjHwxFOcD55x9gPJ9Zeo9bZHTRwpbyl85xh4gJWUKIEKDoq g2PR2rFbNcY7o+qoZP/rrr3ChCsTy1q31N1icM9ZZym74WaeI7ODM2cVf8iZzA== Date: Mon, 13 Apr 2026 10:45:02 +0200 From: Alexandre Belloni To: Akhil R Cc: frank.li@nxp.com, acpica-devel@lists.linux.dev, conor+dt@kernel.org, devicetree@vger.kernel.org, ebiggers@kernel.org, krzk+dt@kernel.org, lenb@kernel.org, linux-acpi@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-i3c@lists.infradead.org, linux-kernel@vger.kernel.org, linux@roeck-us.net, miquel.raynal@bootlin.com, p.zabel@pengutronix.de, rafael@kernel.org, robert.moore@intel.com, robh@kernel.org, sakari.ailus@linux.intel.com, wsa+renesas@sang-engineering.com Subject: Re: [PATCH v2 09/13] i3c: dw-i3c-master: Add a quirk to skip clock and reset Message-ID: <2026041308450274636352@mail.local> References: <20260410060712.30377-1-akhilrajeev@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20260410060712.30377-1-akhilrajeev@nvidia.com> X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260413_014514_708983_BAF3AF0B X-CRM114-Status: GOOD ( 17.29 ) X-BeenThere: linux-i3c@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org On 10/04/2026 11:37:11+0530, Akhil R wrote: > On Thu, 9 Apr 2026 22:45:09 -0400, Frank Li wrote: > > On Thu, Apr 09, 2026 at 04:27:39PM +0530, Akhil R wrote: > >> Some ACPI-enumerated devices like Tegra410 do not have clock and reset > >> resources exposed via the clk/reset frameworks. Add a match data for > > > > why not export fix clock at ACPI? > > > >> such devices to skip acquiring clock and reset controls during probe. > >> > >> Move match data parsing before clock/reset acquisition so the quirk is > >> available early enough. When the quirk is set, fall back to reading > >> the clock rate from the "clock-frequency" device property instead. > > > > "clock-frequency" is legacy proptery. > > The document ACPI on ARMv8 Servers [1] suggests not to use clock or reset > framework at all. I also could not find any proper way to export the clock > to the kernel from the ACPI table. The same document suggests to use only > _DSD properties, if to pass any data to the kernel. > > I can rename the property to 'default-clock-rate' if that sounds good. > Please let me know your suggestion. > "clock-frequency" is fine for ACPI > [1]: https://www.kernel.org/doc/html/v6.1/arm64/arm-acpi.html#programmable-power-control-resources > > Best Regards, > Akhil -- Alexandre Belloni, co-owner and COO, Bootlin Embedded Linux and Kernel engineering https://bootlin.com -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c