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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 26DFAC433EF for ; Tue, 5 Oct 2021 06:54:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0D893613B5 for ; Tue, 5 Oct 2021 06:54:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231967AbhJEGz4 (ORCPT ); Tue, 5 Oct 2021 02:55:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:39012 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230526AbhJEGzz (ORCPT ); Tue, 5 Oct 2021 02:55:55 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3180E6138F; Tue, 5 Oct 2021 06:54:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1633416845; bh=b7QzjFO7hZD8ywQA6H3ZkbswlXTN6z1Bpr2GKwUdVzU=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=j23HgdkHVmGIY0nYmkth4nMgVrSa3DVFN2Dv/+lXDkBtmVhrcDVWO9UlGh9lkAjx2 AvP1BzSAS6zxqU5BnGSlSPJiXf/hrtoYwj5yfvIZ6N5R2QmL1jfzvLEpshoXm9Z+DH Tz5OhuCkE8QhreB3rdKAgNMVJhs8x8NO+tCdfAyQLcjQFFVeP+aMYEXHD1Ix5SQBh8 JdWbJ6C40ejjsii+HPs6JRXVv7KDzuHDH9ztFE7wnwycq0PsRCbX2Wu/yaq5XEBWbW 388Wxw3PBJFU0oG67yVygy39pZDiWn/QU5AKsxRJbKotvTAFG2RvH3zzPlPn9YTYj/ MvdEL9jmK2z4Q== Date: Tue, 5 Oct 2021 14:53:59 +0800 From: Shawn Guo To: Frieder Schrempf Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Sascha Hauer , Frieder Schrempf , Fabio Estevam , Krzysztof Kozlowski , NXP Linux Team , Pengutronix Kernel Team Subject: Re: [PATCH 2/8] arm64: dts: imx8mm-kontron: Make sure SOC and DRAM supply voltages are correct Message-ID: <20211005065358.GZ20743@dragon> References: <20210930155633.2745201-1-frieder@fris.de> <20210930155633.2745201-3-frieder@fris.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210930155633.2745201-3-frieder@fris.de> User-Agent: Mutt/1.9.4 (2018-02-28) Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Thu, Sep 30, 2021 at 05:56:25PM +0200, Frieder Schrempf wrote: > From: Frieder Schrempf > > 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 1.5 GHz. > > This information is taken from the datasheet and the uboot-imx code. I'm wondering where the existing settings were coming from? Shawn > > Signed-off-by: Frieder Schrempf > --- > 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 03b3516abd64..b12fb7ce6686 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 { > @@ -111,7 +113,7 @@ 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; > }; > -- > 2.33.0 >