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 D1FB0C98315 for ; Sun, 18 Jan 2026 23:58:22 +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-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ypc7h/otgx8IvHFGe/9jEz1BLL5oHc6ssefcvkjwgVU=; b=36by1oKCZF7y9L6U2QqBrHlCKo UAQ8ZP4tEXUgmEaEJQMmC1B0n3nHR2FzJFiYqXyYAJISSqCB8DNNy7NIjbKQCQqpCdKsJz5Cfeh3S fQqUa1aHj9LC3UA1/YWntZ0Zd4vWanLfDAP/w3h0cjfXp5h1vaZMt4Senjof9YdMZPei7PueOTp6Q uC5s6wn88aoMDMw3n0ADk1vfB/gLgW+FR0isWesEh14mPNKbzUtIZD97fFvzJTXVD1BawdDLXrkVB UiD6ImI5GdY5jzj5CQtI0iORDch54bhySbe2X8WK8scxdw4sQmVqXoNs4MRN08jLg1s+u7xZx4BU7 fhcu1twQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhcet-00000001BCY-2rHo; Sun, 18 Jan 2026 23:58:15 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhceq-00000001BCI-3teA for linux-arm-kernel@lists.infradead.org; Sun, 18 Jan 2026 23:58:13 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 3ABC560010; Sun, 18 Jan 2026 23:58:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 82652C116D0; Sun, 18 Jan 2026 23:58:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768780689; bh=6bMKJ5lG0PNdrSpn1+M0W36NUJ6bnMbRMOKJStqQ4yQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=tuTyV86wzK2Ik/Ya2XK6dOYuwvctqTKnZO3kTt4mNF4DumN8NWsF96RjVQu0ZXjKa i2s/HqLuyalOM7Gw2f2ZG/3QTXaRpSXqixHqWu09hUqBZnNzTk50ljCqePctcx87G1 zb3yE/FsZn43FxhjfnNo/RremMNUWzXDtscaSpMlV7Y+fCRsMDwgGcm0kOdkKmomlR Uq4gw03GebaUUU8BlXgmcrgTA17ecqQS8p228GE2SnS+OnbcC9wRao6CrwM64O5X6H yNjpqH3k5cZqh6KzWgbRSk1ihvx9a9VFBAZKQNpBVGB+zmqfYggbq6V0Lr/DQQWGaE X94BS51f5yNyw== Date: Mon, 19 Jan 2026 00:58:04 +0100 From: Andi Shyti To: Carlos Song Cc: frank.li@nxp.com, aisheng.dong@nxp.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-i2c@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] i2c: imx-lpi2c: Add runtime PM support for IRQ and clock management on i.MX8QXP/8QM Message-ID: References: <20251125084718.2156168-1-carlos.song@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251125084718.2156168-1-carlos.song@nxp.com> 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 Hi Carlos, On Tue, Nov 25, 2025 at 04:47:18PM +0800, Carlos Song wrote: > On i.MX8QXP/8QM SoCs, both the lvds/mipi and lvds/mipi-lpi2c power domains > must enter low-power mode during runtime suspend to achieve deep power > savings. > ... > - Free its IRQ during runtime suspend and re-request it on resume. > - Disable and unprepare all clocks during runtime suspend and prepare > and rne ble them on resume. > > This enables the lvds/mipi domains to enter deep low-power mode, > significantly reducing power consumption compared to active mode. > > Signed-off-by: Carlos Song merged to i2c/i2c-host. Thanks, Andi