From patchwork Tue Sep 13 10:21:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Felsch X-Patchwork-Id: 12974672 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 AD996C54EE9 for ; Tue, 13 Sep 2022 10:25:50 +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:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=G7dQsdJvqDGcy99ll0dFykLDe5UMp/Z1ZWMPp2CMMnw=; b=2hEBbr2VViLTkP vSMyF+5JLeCO7rCZcfTuNU5duwDKxDRTwNKFCZqZ20X8gRgCKNb/5T/kfyZOOm+wqFTG/SXnWD+kN dAXHix8zmH9dswE4E1NuAOtSlU+EMsBNawxEH5ixsYHV6QzwN0dDkI+CI5lVUZHOBCRzZgvd7Dfl2 oyXsE0gLha7PvLYj8NRwrX619EklNbFT6qVUsoGhssILYwEzZoIc9VsVXi37LZ/V0PrB6Z0Yflf+r DWphNno01oKL3Ke/ajuF0MkS9qbeIQ+WtoxQ8VlqJVoBiO9ZRCD5aAabuPpmvO9rfyhbDa/zAcIWy Sfjya4CLO4TC8loZjuhg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oY35n-006UZB-Tb; Tue, 13 Sep 2022 10:24:42 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oY33G-006SV0-HV for linux-arm-kernel@lists.infradead.org; Tue, 13 Sep 2022 10:22:01 +0000 Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oY334-0002vq-U3; Tue, 13 Sep 2022 12:21:46 +0200 Received: from [2a0a:edc0:0:1101:1d::28] (helo=dude02.red.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1oY335-000TmL-JT; Tue, 13 Sep 2022 12:21:46 +0200 Received: from mfe by dude02.red.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1oY333-004psN-CI; Tue, 13 Sep 2022 12:21:45 +0200 From: Marco Felsch To: krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, abelvesa@kernel.org, abel.vesa@linaro.org, mturquette@baylibre.com, sboyd@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com Cc: linux-kernel@vger.kernel.org, Peng Fan , linux-imx@nxp.com, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org Subject: [RFC PATCH 2/2] arm64: dts: imx8mm-evk: mark 32k pmic clock as always-on Date: Tue, 13 Sep 2022 12:21:41 +0200 Message-Id: <20220913102141.971148-3-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220913102141.971148-1-m.felsch@pengutronix.de> References: <20220913102141.971148-1-m.felsch@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220913_032158_620249_008A7A84 X-CRM114-Status: GOOD ( 12.89 ) 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 This clock is critical for the system since it supplies the 32k SoC clock. Unfortunately the imx8mm.dtsi uses a fixed clock provider for the 32k SoC clock and not this one. If it would use this clock we would add a cycle-dependency since the pmic driver depends on the i2c driver which depends on the clock driver. Therefore use the new "clocks-always-on" macro to mark the clock as critical, so it is never turned off by the kernel. Signed-off-by: Marco Felsch --- arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi index 7d6317d95b13..0e950ef61900 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi @@ -195,6 +195,7 @@ pmic@4b { #clock-cells = <0>; clocks = <&osc_32k 0>; clock-output-names = "clk-32k-out"; + clocks-always-on = "clk-32k-out"; regulators { buck1_reg: BUCK1 {