From patchwork Wed Aug 1 16:32:22 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aapo Vienamo X-Patchwork-Id: 952265 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-tegra-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 41gf6q3QqHz9s3q for ; Thu, 2 Aug 2018 02:35:15 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403962AbeHASUx (ORCPT ); Wed, 1 Aug 2018 14:20:53 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:4962 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2403923AbeHASUx (ORCPT ); Wed, 1 Aug 2018 14:20:53 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1, AES128-SHA) id ; Wed, 01 Aug 2018 09:34:07 -0700 Received: from HQMAIL101.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Wed, 01 Aug 2018 09:34:20 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Wed, 01 Aug 2018 09:34:20 -0700 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Wed, 1 Aug 2018 16:34:19 +0000 Received: from HQMAIL106.nvidia.com (172.18.146.12) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Wed, 1 Aug 2018 16:34:19 +0000 Received: from hqnvemgw02.nvidia.com (172.16.227.111) by HQMAIL106.nvidia.com (172.18.146.12) with Microsoft SMTP Server (TLS) id 15.0.1347.2 via Frontend Transport; Wed, 1 Aug 2018 16:34:19 +0000 Received: from dhcp-10-21-25-168.Nvidia.com (Not Verified[10.21.25.201]) by hqnvemgw02.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Wed, 01 Aug 2018 09:34:19 -0700 From: Aapo Vienamo To: Rob Herring , Mark Rutland , Thierry Reding , Jonathan Hunter , Ulf Hansson , Adrian Hunter , Mikko Perttunen , "Stefan Agner" CC: , , , , Aapo Vienamo Subject: [PATCH 32/40] arm64: dts: tegra210-p2180: Allow ldo2 to go down to 1.8 V Date: Wed, 1 Aug 2018 19:32:22 +0300 Message-ID: <1533141150-10511-33-git-send-email-avienamo@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1533141150-10511-1-git-send-email-avienamo@nvidia.com> References: <1533141150-10511-1-git-send-email-avienamo@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Set regulator-min-microvolt property of ldo2 to 1.8 V in tegra210-p2180.dtsi. ldo2 is used by the sdmmc1 SDHCI controller and its voltage needs to be adjusted down to 1.8 V to support faster signaling modes. It appears that the comment about the SDHCI driver requesting invalid voltages no longer applies. Signed-off-by: Aapo Vienamo Reviewed-by: Mikko Perttunen --- arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi | 11 +---------- 1 file changed, 1 insertion(+), 10 deletions(-) diff --git a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi index 212e663..8496101 100644 --- a/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi @@ -178,16 +178,7 @@ vddio_sdmmc: ldo2 { regulator-name = "VDDIO_SDMMC"; - /* - * Technically this supply should have - * a supported range from 1.8 - 3.3 V. - * However, that would cause the SDHCI - * driver to request 2.7 V upon access - * and that in turn will cause traffic - * to be broken. Leave it at 3.3 V for - * now. - */ - regulator-min-microvolt = <3300000>; + regulator-min-microvolt = <1800000>; regulator-max-microvolt = <3300000>; regulator-always-on; regulator-boot-on;