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[209.132.180.67]) by mx.google.com with ESMTP id 185-v6si10526892pgj.511.2018.08.10.11.23.41; Fri, 10 Aug 2018 11:23:55 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730745AbeHJUlZ (ORCPT + 99 others); Fri, 10 Aug 2018 16:41:25 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:11475 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728001AbeHJUlY (ORCPT ); Fri, 10 Aug 2018 16:41:24 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1, AES128-SHA) id ; Fri, 10 Aug 2018 11:10:13 -0700 Received: from HQMAIL103.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Fri, 10 Aug 2018 11:10:28 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Fri, 10 Aug 2018 11:10:28 -0700 Received: from HQMAIL106.nvidia.com (172.18.146.12) by HQMAIL103.nvidia.com (172.20.187.11) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Fri, 10 Aug 2018 18:10:28 +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; Fri, 10 Aug 2018 18:10:27 +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 ; Fri, 10 Aug 2018 11:10:27 -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 v2 32/40] arm64: dts: tegra210-p2180: Allow ldo2 to go down to 1.8 V Date: Fri, 10 Aug 2018 21:08:34 +0300 Message-ID: <1533924522-1037-33-git-send-email-avienamo@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1533924522-1037-1-git-send-email-avienamo@nvidia.com> References: <1533924522-1037-1-git-send-email-avienamo@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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; -- 2.7.4