From patchwork Wed Jun 1 06:56:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kurapati X-Patchwork-Id: 12866405 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3D5AC4332F for ; Wed, 1 Jun 2022 06:56:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350006AbiFAG4f (ORCPT ); Wed, 1 Jun 2022 02:56:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231705AbiFAG43 (ORCPT ); Wed, 1 Jun 2022 02:56:29 -0400 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 12DE95641F; Tue, 31 May 2022 23:56:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1654066588; x=1685602588; h=from:to:cc:subject:date:message-id:mime-version; bh=LJQybaBM/F7Bf/W5JS+iZAoLpoQv+yfMRgTyPAvu6vg=; b=yJkN00j73m4naK14768529ZViuFoC0iR6XBAnjLIv48pC/iLdvyb01rh WJp8LC4n3Yl5nKU/rpHLNQOREIdKeJ473oV9bisk/h6vDAwI1P/Y2IjkU 510M4A0EGMKKrR9GtiVGq5qJ4WjL4azywXR5g5ug0xT5VMpjw7J+gyRIQ Q=; Received: from ironmsg08-lv.qualcomm.com ([10.47.202.152]) by alexa-out.qualcomm.com with ESMTP; 31 May 2022 23:56:28 -0700 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg08-lv.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 May 2022 23:56:27 -0700 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Tue, 31 May 2022 23:56:13 -0700 Received: from hu-kriskura-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Tue, 31 May 2022 23:56:08 -0700 From: Krishna Kurapati To: Krzysztof Kozlowski , Rob Herring , Andy Gross , Bjorn Andersson , Greg Kroah-Hartman , Stephen Boyd , "Doug Anderson" , Matthias Kaehlcke , Wesley Cheng CC: , , , , , , , , Krishna Kurapati Subject: [PATCH v8 0/3] Add QCOM SNPS PHY overriding params support Date: Wed, 1 Jun 2022 12:26:01 +0530 Message-ID: <1654066564-20518-1-git-send-email-quic_kriskura@quicinc.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Added support for overriding tuning parameters in QCOM SNPS PHY from device tree. This parameter tuning is required to tune the hs signal on dp/dm lines for electrical compliance to be successful. changes in v8: Fixed nitpick in driver code. changes in v7: Fixed nitpick in driver code and dtsi file. changes in v6: Fixed errors in dt-bindings. Fixed nitpick in driver code. changes in v5: Fixed nitpicks in code. Added minimum and maximum for each parameter added in dt-bindings. Added proper suffixes to each parameter as per dtschema. changes in v4: Fixed nitpicks in code. Initial compliance test results showed overshoot in the middle of eye diagram. The current dt values were put in place to correct it and fix overshoot issue. changes in v3: Added support for phy tuning parameters to be represented in bps and corresponding register values to be written are obtained by traversing through data map declared in the driver. changes in v2: Reading the individual fields in each overriding register from device tree. Krishna Kurapati (2): phy: qcom-snps: Add support for overriding phy tuning parameters arm64: dts: qcom: sc7280: Update SNPS Phy params for SC7280 IDP device Sandeep Maheswaram (1): dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings .../bindings/phy/qcom,usb-snps-femto-v2.yaml | 96 ++++++++ arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 6 + drivers/phy/qualcomm/phy-qcom-snps-femto-v2.c | 267 ++++++++++++++++++++- 3 files changed, 367 insertions(+), 2 deletions(-)