From patchwork Thu Aug 30 15:06:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aapo Vienamo X-Patchwork-Id: 963924 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 421Qnc5gfQz9s3x for ; Fri, 31 Aug 2018 01:07:00 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728730AbeH3TJe (ORCPT ); Thu, 30 Aug 2018 15:09:34 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:2567 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728566AbeH3TJd (ORCPT ); Thu, 30 Aug 2018 15:09:33 -0400 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 30 Aug 2018 08:06:57 -0700 Received: from HQMAIL101.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Thu, 30 Aug 2018 08:06:57 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Thu, 30 Aug 2018 08:06:57 -0700 Received: from HQMAIL102.nvidia.com (172.18.146.10) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 30 Aug 2018 15:06:57 +0000 Received: from HQMAIL104.nvidia.com (172.18.146.11) by HQMAIL102.nvidia.com (172.18.146.10) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Thu, 30 Aug 2018 15:06:57 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL104.nvidia.com (172.18.146.11) with Microsoft SMTP Server (TLS) id 15.0.1395.4 via Frontend Transport; Thu, 30 Aug 2018 15:06:57 +0000 Received: from dhcp-10-21-25-168.Nvidia.com (Not Verified[10.21.25.201]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7, 5, 8, 10121) id ; Thu, 30 Aug 2018 08:06:56 -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 v3 04/38] dt-bindings: mmc: Add Tegra SDHCI sampling trimmer values Date: Thu, 30 Aug 2018 18:06:05 +0300 Message-ID: <20180830150639.21048-5-avienamo@nvidia.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180830150639.21048-1-avienamo@nvidia.com> References: <20180830150639.21048-1-avienamo@nvidia.com> MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Document the Tegra SDHCI inbound and outbound sampling trimmer values. Signed-off-by: Aapo Vienamo Acked-by: Thierry Reding --- .../devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt index 9713e052f736..edecf97231b9 100644 --- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt +++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt @@ -67,6 +67,10 @@ Optional properties for Tegra210 and Tegra186: - nvidia,pad-autocal-pull-up-offset-hs400, nvidia,pad-autocal-pull-down-offset-hs400 : Specify drive strength calibration offsets for HS400 mode. +- nvidia,default-tap : Specify the default inbound sampling clock + trimmer value for non-tunable modes. +- nvidia,default-trim : Specify the default outbound clock trimmer + value. Notes on the pad calibration pull up and pulldown offset values: - The property values are drive codes which are programmed into the @@ -77,6 +81,13 @@ Optional properties for Tegra210 and Tegra186: - The SDR104 and HS400 timing specific values are used in corresponding modes if specified. + Notes on tap and trim values: + - The values are used for compensating trace length differences + by adjusting the sampling point. + - The values are programmed to the Vendor Clock Control Register. + Please refer to the reference manual of the SoC for correct + values. + Example: sdhci@700b0000 { compatible = "nvidia,tegra210-sdhci", "nvidia,tegra124-sdhci";