From patchwork Fri Oct 15 12:48:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frieder Schrempf X-Patchwork-Id: 12561405 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 109CFC433EF for ; Fri, 15 Oct 2021 12:51:04 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D1DFC610E5 for ; Fri, 15 Oct 2021 12:51:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org D1DFC610E5 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=fris.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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=MmPsnOFVpPjhphdCbMNqyn5alEuwtWm0RymtTQxOQfA=; b=g2IXPEUhrS9ueW usB+RS8fYMk4+jnvgRSRUB3D/UfFk0UG3PXJfXm/w2QOZw5Y40i0+x+sVMGRyVGEgSDmOc5jjaP6Z 93WgaerR4MBzbfCgKHL83ey9zM58ezho4TGkWlTOsytJ048tlmS5+sJfo1a5wrT0ppk8HKEgAz2pS ife7AjRbK4hZW7F87y/FesiZl3bHI+HPfNksyvy4yiNDXHik541fHkHokFseLHAmnsGrk/R55bMtx HrczO88qNmMJQs+ihA4b6SzR7O0TAXw3RNRmDwX6gFl7UE6mpjUzIXgCUNlA5KyX/W/Njrv8XrOnY WEP6F294KYIbmOPmJgig==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbMef-0070IN-96; Fri, 15 Oct 2021 12:49:45 +0000 Received: from mail.fris.de ([2a01:4f8:c2c:390b::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbMeE-0070B8-UT for linux-arm-kernel@lists.infradead.org; Fri, 15 Oct 2021 12:49:20 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id DEB32BFC0F; Fri, 15 Oct 2021 14:49:14 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fris.de; s=dkim; t=1634302156; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=b3WwxseBuxxlm1edv2TBXG5FbEqMfGNzQKzPCy8l4AI=; b=T3B2ZHCYIOEjYoN2Fy5rz6oP3gJ3f7yXxiTpjRyXgUuZSaeRw2XJysmckQs/RE68ttVt8M XbyiL/FzBvzoN3KkXeiJENFFhDk8uLygFUt4VdIRkSN5RlJ8j/nSIa0rgBdwTBftC6HPjF EsjSTmkNPZw2NYzjqp29n++NzP2l4wJ5Byg4K9SQgWEitSop+Ku87Y9OwbicY3MscaO5Wf rdVjrsYgbWlekTIcfnue1mdsHm47FZELmLRnbPGsi+C1APLW7gOUp8wNwafXGwjm+eHcfY r/VyFLzjvhfWaP5Tg0Ktds3LFkMQZhv3SGUya+6rXEvJIX68mzI7hc61rgKfbQ== From: Frieder Schrempf To: devicetree@vger.kernel.org, Frieder Schrempf , Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Sascha Hauer , Shawn Guo Cc: stable@vger.kernel.org, Fabio Estevam , Heiko Thiery , NXP Linux Team , Pengutronix Kernel Team Subject: [PATCH v2 2/6] arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct Date: Fri, 15 Oct 2021 14:48:36 +0200 Message-Id: <20211015124841.28226-3-frieder@fris.de> In-Reply-To: <20211015124841.28226-1-frieder@fris.de> References: <20211015124841.28226-1-frieder@fris.de> MIME-Version: 1.0 X-Last-TLS-Session-Version: TLSv1.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211015_054919_167168_15DB3DD9 X-CRM114-Status: GOOD ( 10.12 ) 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 From: Frieder Schrempf It looks like the voltages for the SOC and DRAM supply weren't properly validated before. The datasheet and uboot-imx code tells us that VDD_SOC should be 800 mV in suspend and 850 mV in run mode. VDD_DRAM should be 950 mV for DDR clock frequencies of up to 1.5 GHz. Let's fix these values to make sure the voltages are within the required range. Fixes: 8668d8b2e67f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards") Cc: stable@vger.kernel.org Signed-off-by: Frieder Schrempf --- Changes in v2: * Fix the commit ref in the Fixes tag * Improve commit message --- arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi index 6eacc32bc95e..4df45b5e5f6e 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-som.dtsi @@ -92,10 +92,12 @@ regulators { reg_vdd_soc: BUCK1 { regulator-name = "buck1"; regulator-min-microvolt = <800000>; - regulator-max-microvolt = <900000>; + regulator-max-microvolt = <850000>; regulator-boot-on; regulator-always-on; regulator-ramp-delay = <3125>; + nxp,dvs-run-voltage = <850000>; + nxp,dvs-standby-voltage = <800000>; }; reg_vdd_arm: BUCK2 { @@ -112,7 +114,7 @@ reg_vdd_arm: BUCK2 { reg_vdd_dram: BUCK3 { regulator-name = "buck3"; regulator-min-microvolt = <850000>; - regulator-max-microvolt = <900000>; + regulator-max-microvolt = <950000>; regulator-boot-on; regulator-always-on; };