From patchwork Mon Oct 11 14:36:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Cercueil X-Patchwork-Id: 12550121 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C736C433EF for ; Mon, 11 Oct 2021 14:37:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61F7660EB1 for ; Mon, 11 Oct 2021 14:37:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242286AbhJKOjt (ORCPT ); Mon, 11 Oct 2021 10:39:49 -0400 Received: from aposti.net ([89.234.176.197]:46614 "EHLO aposti.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242172AbhJKOjV (ORCPT ); Mon, 11 Oct 2021 10:39:21 -0400 From: Paul Cercueil To: Vinod Koul , Rob Herring Cc: list@opendingux.net, dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, Paul Cercueil Subject: [PATCH 2/5] dt-bindings: dma: ingenic: Support #dma-cells = <3> Date: Mon, 11 Oct 2021 16:36:49 +0200 Message-Id: <20211011143652.51976-3-paul@crapouillou.net> In-Reply-To: <20211011143652.51976-1-paul@crapouillou.net> References: <20211011143652.51976-1-paul@crapouillou.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org Extend the binding to support specifying a different request type for each direction. Signed-off-by: Paul Cercueil --- Documentation/devicetree/bindings/dma/ingenic,dma.yaml | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/dma/ingenic,dma.yaml b/Documentation/devicetree/bindings/dma/ingenic,dma.yaml index f45fd5235879..51b41e4795a2 100644 --- a/Documentation/devicetree/bindings/dma/ingenic,dma.yaml +++ b/Documentation/devicetree/bindings/dma/ingenic,dma.yaml @@ -44,13 +44,17 @@ properties: maxItems: 1 "#dma-cells": - const: 2 + enum: [2, 3] description: > DMA clients must use the format described in dma.txt, giving a phandle - to the DMA controller plus the following 2 integer cells: + to the DMA controller plus the following integer cells: - Request type: The DMA request type for transfers to/from the device on the allocated channel, as defined in the SoC documentation. + If "#dma-cells" is 2, the request type is a single cell. If + "#dma-cells" is 3, the request type has two cells; the first one + corresponds to the host to device direction, the second one corresponds + to the device to host direction. - Channel: If set to 0xffffffff, any available channel will be allocated for the client. Otherwise, the exact channel specified will be used.