From patchwork Tue Mar 15 19:12:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12781773 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 06F14C4332F for ; Tue, 15 Mar 2022 19:13:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346896AbiCOTOV (ORCPT ); Tue, 15 Mar 2022 15:14:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45984 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245232AbiCOTOU (ORCPT ); Tue, 15 Mar 2022 15:14:20 -0400 Received: from relay6-d.mail.gandi.net (relay6-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::226]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53BC7CF0; Tue, 15 Mar 2022 12:13:03 -0700 (PDT) Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id C9B99C0005; Tue, 15 Mar 2022 19:12:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1647371582; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dGdZ3v/UIIN/shvZ1IhmcrAqm0j6EVMRXCucqy7b3F8=; b=SO0l0tBMaIZ4tH4cajEEw2HV8TxkjQPVwzHD7JcbTZnwe+E1c8RohjUfZ3HOr9qRsVqxRg 906LdlmYHqF7D/n+vlGq7EnFEKgJIME1Qh3OjppRLxJ8YG10gQi57AD8j5M16+/6mc/jZ+ /anVyUVCL7J+I2gAOG+kfu4arp6EQnrMAqVxqdi1B6ofCZBtA/uJC3yN6qWnjYMC5SYUwV BBqLgBZGuB0aK+AuEgGC8fLf1yX6OStzelVwIKyrrWcgF8oQN56q3dxS1/9ANxCGEzpiDL rOsPaFEwK90a6sn1RZy+/N+o5YP2LWMwR0+++NXRYuiUwhnZ0xazO83PjPEkgQ== From: Miquel Raynal To: linux-renesas-soc@vger.kernel.org, Magnus Damm , Gareth Williams , Phil Edworthy , Geert Uytterhoeven , Stephen Boyd , Michael Turquette , linux-clk@vger.kernel.org, Vinod Koul , dmaengine@vger.kernel.org Cc: Milan Stevanovic , Jimmy Lalande , Pascal Eberhard , Thomas Petazzoni , Herve Codina , Clement Leger , Andy Shevchenko , Viresh Kumar , Miquel Raynal , Geert Uytterhoeven , Rob Herring Subject: [PATCH v5 1/8] dt-bindings: dmaengine: Introduce RZN1 dmamux bindings Date: Tue, 15 Mar 2022 20:12:48 +0100 Message-Id: <20220315191255.221473-2-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220315191255.221473-1-miquel.raynal@bootlin.com> References: <20220315191255.221473-1-miquel.raynal@bootlin.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org The Renesas RZN1 DMA IP is based on a DW core, with eg. an additional dmamux register located in the system control area which can take up to 32 requests (16 per DMA controller). Each DMA channel can be wired to two different peripherals. Signed-off-by: Miquel Raynal Reviewed-by: Geert Uytterhoeven Reviewed-by: Rob Herring --- .../bindings/dma/renesas,rzn1-dmamux.yaml | 51 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 52 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml diff --git a/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml b/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml new file mode 100644 index 000000000000..d83013b0dd74 --- /dev/null +++ b/Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml @@ -0,0 +1,51 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/renesas,rzn1-dmamux.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas RZ/N1 DMA mux + +maintainers: + - Miquel Raynal + +allOf: + - $ref: "dma-router.yaml#" + +properties: + compatible: + const: renesas,rzn1-dmamux + + reg: + maxItems: 1 + description: DMA mux first register offset within the system control parent. + + '#dma-cells': + const: 6 + description: + The first four cells are dedicated to the master DMA controller. The fifth + cell gives the DMA mux bit index that must be set starting from 0. The + sixth cell gives the binary value that must be written there, ie. 0 or 1. + + dma-masters: + minItems: 1 + maxItems: 2 + + dma-requests: + const: 32 + +required: + - reg + - dma-requests + +additionalProperties: false + +examples: + - | + dma-router@a0 { + compatible = "renesas,rzn1-dmamux"; + reg = <0xa0 4>; + #dma-cells = <6>; + dma-masters = <&dma0 &dma1>; + dma-requests = <32>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index ea3e6c914384..c70c9c39a2f3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -18636,6 +18636,7 @@ SYNOPSYS DESIGNWARE DMAC DRIVER M: Viresh Kumar R: Andy Shevchenko S: Maintained +F: Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml F: Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml F: drivers/dma/dw/ F: include/dt-bindings/dma/dw-dmac.h