From patchwork Wed Jun 14 07:16:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephan Gerhold X-Patchwork-Id: 13279597 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 C5BAEEB64DC for ; Wed, 14 Jun 2023 07:17:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243028AbjFNHRJ (ORCPT ); Wed, 14 Jun 2023 03:17:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38056 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243470AbjFNHQa (ORCPT ); Wed, 14 Jun 2023 03:16:30 -0400 Received: from mo4-p02-ob.smtp.rzone.de (mo4-p02-ob.smtp.rzone.de [81.169.146.169]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E80E1FE2; Wed, 14 Jun 2023 00:16:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1686726979; cv=none; d=strato.com; s=strato-dkim-0002; b=LSOXVt9xjPH3jOL8WmwYhWJAt7aSQnLL7b4yjO22ZqqhfY5KRll5pWRn6xlQ0X8MRJ Py6gk/2EkKJRRT80N8RQyF8wa+MHE99fmmmOZCcSaVUhwk2bwcyQmh7ZEd+mSgCTId4M s3rG5PT9zGr3uWgUCA+h2mCBGV1jGw5OCLpeFbKvBLbpFcoafSgTQEn/RZimUPjMNFvM vx6OZO0+D4WrNw+V+z0ciAA3iX1uymwhe8gP1+YgzcOhVpWDqKuvUT5X1QuFH5nt7nMC u4WaMm6MvKOs0w24NUkNEP3H1cHcoNfIBs8if+MRnTqVgHtCm9AJLSZKPhouOuJ/skzk nzpQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; t=1686726979; s=strato-dkim-0002; d=strato.com; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=Z643LN4iyCKvjK5j6XP9XQLu7ScuQMBkvKKX5tWCT6A=; b=tDGOzK21aTpQxVJr3j3riKw4EvjFpKhK/YJptAmQ8KFtaivVxOnFv6sdVRgyRcHxg+ /FEo5vD1jgI+tYOcWeLcXxVljwwXMUMrDHH/H74/kNMw0rkGMtVkS5KIYzbrBIFjUX85 xhgN3pgmmlhL55T4zXam0swrUmbf+PNs9KTb35cOQIZoAk60TaNLbCyDYs68K9SFs9Er lWqzUeNGxq1puNfCRNV/VtfKm9OhIEYGBrCAPIz8xujXEDi8GzVZUgqBMxZN4Tex85oZ gaYFrl9vWr5i4Hb8zzMf5N1ob+FLfowgDqYKrdE2yJrRvRhKy0YwXizAUCx7EuYaJfWJ 2ofA== ARC-Authentication-Results: i=1; strato.com; arc=none; dkim=none X-RZG-CLASS-ID: mo02 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1686726979; s=strato-dkim-0002; d=gerhold.net; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=Z643LN4iyCKvjK5j6XP9XQLu7ScuQMBkvKKX5tWCT6A=; b=cH+nJlxRgvHSKumxuBlpsSvDelba44hrefij7yPtZ9SiJzVDYBRjzvpqs/KNx0bUbu 4U3I9TCyzSyAzWQ5PEAbzUvaDYGhCHwlGLfrBSqGsTHJcyQ6K6Ne97n+iVug1X2eDwje GTtu9IT2PGY4dSkfJJEF9D3OxIfZvMKckVenEuWZWBMAuaPgZMWPUmknINht4QkFcRTt HMmxXyaWYKn4lVkZ7d2tSs8WtELo5GtzwEw8J0MECGXtljN5WL5NR5qF4OEriRpjyWDI xZglsKpj7RoAzqrcSaRxGkPFm105uTBlNipeBUKOGZPCVcYwVyWl6iM4kc75fUDeMWqu E4qA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; t=1686726979; s=strato-dkim-0003; d=gerhold.net; h=Cc:To:In-Reply-To:References:Message-Id:Subject:Date:From:Cc:Date: From:Subject:Sender; bh=Z643LN4iyCKvjK5j6XP9XQLu7ScuQMBkvKKX5tWCT6A=; b=Zc8HuGxtaeZi2LX/FBGgscgGvRRizrvppB8RTvCOlGXZqdq6jdIs0HPKqN+FJV/mJO 0omNxlBwnpdGt5asuNBw== X-RZG-AUTH: ":P3gBZUipdd93FF5ZZvYFPugejmSTVR2nRPhVOQjVd4CteZ/7jYgS+mLFY+H0JAn8u4xxmw==" Received: from [192.168.244.3] by smtp.strato.de (RZmta 49.5.3 DYNA|AUTH) with ESMTPSA id Z82ec2z5E7GJb2j (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits)) (Client did not present a certificate); Wed, 14 Jun 2023 09:16:19 +0200 (CEST) From: Stephan Gerhold Date: Wed, 14 Jun 2023 09:16:06 +0200 Subject: [PATCH 8/8] arm64: dts: qcom: msm8939-pm8916: Mark always-on regulators MIME-Version: 1.0 Message-Id: <20230530-msm8939-regulators-v1-8-a3c3ac833567@gerhold.net> References: <20230530-msm8939-regulators-v1-0-a3c3ac833567@gerhold.net> In-Reply-To: <20230530-msm8939-regulators-v1-0-a3c3ac833567@gerhold.net> To: Bjorn Andersson Cc: Andy Gross , Konrad Dybcio , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Bryan O'Donoghue , Stephan Gerhold X-Mailer: b4 0.12.2 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Some of the regulators must be always-on to ensure correct operation of the system, e.g. PM8916 L2 for the LPDDR RAM, L5 for most digital I/O and L7 for the CPU PLL (strictly speaking the CPU PLL might only need an active-only vote but this is not supported for regulators in mainline currently). The RPM firmware seems to enforce that internally, these supplies stay on even if we vote for them to power off (and there is no other processor running). This means it's pointless to keep sending enable/disable requests because they will just be ignored. Also, drivers are much more likely to get a wrong impression of the regulator status, because regulator_is_enabled() will return false when there are no users, even though the regulator is always on. Describe this properly by marking the regulators as always-on. The same changes was already made for MSM8916 in commit 8bbd35771f90 ("arm64: dts: qcom: msm8916-pm8916: Mark always-on regulators"). Signed-off-by: Stephan Gerhold --- arch/arm64/boot/dts/qcom/msm8939-pm8916.dtsi | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/msm8939-pm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8939-pm8916.dtsi index 12538211bc72..adb96cd8d643 100644 --- a/arch/arm64/boot/dts/qcom/msm8939-pm8916.dtsi +++ b/arch/arm64/boot/dts/qcom/msm8939-pm8916.dtsi @@ -51,10 +51,12 @@ pm8916_rpm_regulators: regulators { pm8916_s3: s3 { regulator-min-microvolt = <1250000>; regulator-max-microvolt = <1350000>; + regulator-always-on; /* Needed for L2 */ }; pm8916_s4: s4 { regulator-min-microvolt = <1850000>; regulator-max-microvolt = <2150000>; + regulator-always-on; /* Needed for L5/L7 */ }; /* @@ -71,6 +73,7 @@ pm8916_s4: s4 { pm8916_l2: l2 { regulator-min-microvolt = <1200000>; regulator-max-microvolt = <1200000>; + regulator-always-on; /* Needed for LPDDR RAM */ }; /* pm8916_l3 is managed by rpmpd (MSM8939_VDDMX) */ @@ -80,6 +83,7 @@ pm8916_l2: l2 { pm8916_l5: l5 { regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; /* Needed for most digital I/O */ }; pm8916_l6: l6 { @@ -90,6 +94,7 @@ pm8916_l6: l6 { pm8916_l7: l7 { regulator-min-microvolt = <1800000>; regulator-max-microvolt = <1800000>; + regulator-always-on; /* Needed for CPU PLL */ }; pm8916_l8: l8 {