From patchwork Mon Feb 8 13:55:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Serge Semin X-Patchwork-Id: 12075623 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3065CC433E0 for ; Mon, 8 Feb 2021 14:13:14 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E359164E60 for ; Mon, 8 Feb 2021 14:13:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E359164E60 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=baikalelectronics.ru Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-ID:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=bBZAFuCV+Nbyuwpk12GzIy2qVwuBhy+9j9wk7dC4uH4=; b=GJG2ddMdvOv0E45i999g4WSYD LQmzxW82rrgpOyHht2ob/Se9rjrKj6yptIf5K1IVmAGNwvQoi/3zQnObOdY9hQoaKOpoQW19kUOAs d46f0hkRIsJuIDH01nrfREoHNn2Q5zaHo+1wDkefNM5346JQ2r54iX/B8L6eZtaQSBT6PJ8tqvFcd l+GUTRwi+WU6VDB8Kyw9v83YItAXZIJmB2FiUAzimNZFMi9J1+yOp4JQbRRYvKifTBnfS4Y/gBFgh AjzqW7eEJUoHK3Av6VKkT4dFN8RpQagm/7XqMPociVnzmKni3SAwFqpt87erqkI1oV1HYrR5F2Q+v tlo12FkfA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l97GD-0006po-Vo; Mon, 08 Feb 2021 14:11:30 +0000 Received: from mail.baikalelectronics.com ([87.245.175.226] helo=mail.baikalelectronics.ru) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l97B1-00046j-KY for linux-arm-kernel@lists.infradead.org; Mon, 08 Feb 2021 14:06:09 +0000 From: Serge Semin To: Rob Herring , Giuseppe Cavallaro , Alexandre Torgue , Jose Abreu , "David S. Miller" , Jakub Kicinski , Johan Hovold , Maxime Ripard , Joao Pinto , Lars Persson Subject: [PATCH v2 02/24] dt-bindings: net: dwmac: Extend number of PBL values Date: Mon, 8 Feb 2021 16:55:46 +0300 Message-ID: <20210208135609.7685-3-Sergey.Semin@baikalelectronics.ru> In-Reply-To: <20210208135609.7685-1-Sergey.Semin@baikalelectronics.ru> References: <20210208135609.7685-1-Sergey.Semin@baikalelectronics.ru> MIME-Version: 1.0 X-ClientProxiedBy: MAIL.baikal.int (192.168.51.25) To mail (192.168.51.25) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210208_090607_987356_3299A291 X-CRM114-Status: UNSURE ( 7.93 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Rob Herring , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Serge Semin , Alexey Malahov , Serge Semin , Vyacheslav Mitrofanov , Pavel Parkhomenko , Maxime Coquelin , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In accordance with [1] the permitted PBL values can be set as one of [1, 2, 4, 8, 16, 32]. The rest of the values result in undefined behavior. At the same time some of the permitted values can be also invalid depending on the controller FIFOs size and the data bus width. Due to having too many variables all the possible PBL property constraints can't be implemented in the bindings schema, let's extend the set of permitted PBL values to be as much as the configuration register supports leaving the undefined behaviour cases for developers to handle. [1] DesignWare Cores Ethernet MAC Universal Databook, Revision 3.73a, October 2013, p. 380. Signed-off-by: Serge Semin Reviewed-by: Rob Herring Changelog v2: - Use correct syntax of the JSON pointers, so the later would begin with a '/' after the '#'. --- Documentation/devicetree/bindings/net/snps,dwmac.yaml | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml index 40a002770441..cb68a8dcafd7 100644 --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml @@ -267,23 +267,26 @@ properties: snps,pbl: description: - Programmable Burst Length (tx and rx) + Programmable Burst Length (tx and rx). Note some of these values + can be still invalid due to HW limitations connected with the data + bus width and the FIFOs depth, so a total length of a single DMA + burst shouldn't exceed half the FIFO depth. $ref: /schemas/types.yaml#/definitions/uint32 - enum: [2, 4, 8] + enum: [1, 2, 4, 8, 16, 32] snps,txpbl: description: Tx Programmable Burst Length. If set, DMA tx will use this value rather than snps,pbl. $ref: /schemas/types.yaml#/definitions/uint32 - enum: [2, 4, 8] + enum: [1, 2, 4, 8, 16, 32] snps,rxpbl: description: Rx Programmable Burst Length. If set, DMA rx will use this value rather than snps,pbl. $ref: /schemas/types.yaml#/definitions/uint32 - enum: [2, 4, 8] + enum: [1, 2, 4, 8, 16, 32] snps,no-pbl-x8: $ref: /schemas/types.yaml#/definitions/flag