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: 12974676 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DEBBC6FA89 for ; Tue, 13 Sep 2022 10:22:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231527AbiIMKWF (ORCPT ); Tue, 13 Sep 2022 06:22:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47928 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231500AbiIMKWB (ORCPT ); Tue, 13 Sep 2022 06:22:01 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A589356BBE for ; Tue, 13 Sep 2022 03:21:59 -0700 (PDT) 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-clk@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.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 {