From patchwork Tue Feb 22 10:34:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Miquel Raynal X-Patchwork-Id: 12754814 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 5B271C4332F for ; Tue, 22 Feb 2022 10:34:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229825AbiBVKfQ (ORCPT ); Tue, 22 Feb 2022 05:35:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33192 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229729AbiBVKfQ (ORCPT ); Tue, 22 Feb 2022 05:35:16 -0500 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [IPv6:2001:4b98:dc4:8::229]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5794A159E9C; Tue, 22 Feb 2022 02:34:49 -0800 (PST) Received: (Authenticated sender: miquel.raynal@bootlin.com) by mail.gandi.net (Postfix) with ESMTPSA id 883EBFF803; Tue, 22 Feb 2022 10:34:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1645526087; 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; bh=ANMNWvUZfIde6jvdiaNgWqYa5EGxthYlnq/u9TekD4o=; b=AA6ON+TMG69/MK06aYh93vn19X0U3Eki4jIxJMKI2oG2ZieFiR36/CgwUznO29I4Q1bRGO hSvn/IW5Ujp2yvnXcfXFc6avEiVuf9w8KVPiWkAAMq4RfkzGt44MQWpkIByHnK3Ixd0a7X PLcKqxXOVt/UiJOH2j+uHYQEdaVt17FFJtidb4aJhsqIbpEFM6q2eaW7ACnEN54m0SuvBp 3rplic5UZMPa2xQZK6+iUsBnpDSikGDb2vbw8RsHKqaoJY6D7lTv0bjLk5rQRILDlkpMyb rPynAH7Y+UsbbNFHVnEK6BtgCK78RoGxbWjekuefVcCjdxdC2nWBOOtYaWWjaQ== From: Miquel Raynal To: Vinod Koul , Andy Shevchenko Cc: dmaengine@vger.kernel.org, Rob Herring , devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Magnus Damm , Gareth Williams , Phil Edworthy , Geert Uytterhoeven , Stephen Boyd , Michael Turquette , linux-clk@vger.kernel.org, Thomas Petazzoni , Milan Stevanovic , Jimmy Lalande , Pascal Eberhard , Miquel Raynal Subject: [PATCH v2 0/8] RZN1 DMA support Date: Tue, 22 Feb 2022 11:34:29 +0100 Message-Id: <20220222103437.194779-1-miquel.raynal@bootlin.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org Hello, Here is a first series bringing DMA support to RZN1 platforms. I'm not a DMA expert at all so criticism is welcome. Soon a second series will come with changes made to the UART controller driver, in order to interact with the RZN1 DMA controller. Cheers, Miquèl Changes in v2: * Clarified that the 'fix' regarding non aligned reads would only apply to the DEV_TO_MEM case. * Fix the DMA controller compatible string (copy-paste error). * s/syscon/sysctrl/ as advised by Geert. * Disabled irqs when taking the spinlock from the clocks driver. * Moved the DMAMUX offset inside the driver. * Removed extra commas. * Improved the style as suggested by Andy. * Removed a dupplicated check against the device node presence. * Reduced the number of lines of code by using dev_err_probe(). * Created a Kconfig symbol for DMAMUX to fix the two robot reports received and be sure there was no useless overhead with other platforms. Miquel Raynal (7): dt-bindings: dma: Introduce RZN1 dmamux bindings dt-bindings: dma: Introduce RZN1 DMA compatible soc: renesas: rzn1-sysc: Export function to set dmamux dma: dmamux: Introduce RZN1 DMA router support dma: dw: Add RZN1 compatible ARM: dts: r9a06g032: Add the two DMA nodes ARM: dts: r9a06g032: Describe the DMA router Phil Edworthy (1): dma: dw: Avoid partial transfers .../bindings/dma/renesas,rzn1-dmamux.yaml | 42 +++++ .../bindings/dma/snps,dma-spear1340.yaml | 8 +- MAINTAINERS | 1 + arch/arm/boot/dts/r9a06g032.dtsi | 37 ++++ drivers/clk/renesas/r9a06g032-clocks.c | 31 ++++ drivers/dma/dw/Kconfig | 8 + drivers/dma/dw/Makefile | 2 + drivers/dma/dw/core.c | 3 + drivers/dma/dw/dmamux.c | 167 ++++++++++++++++++ drivers/dma/dw/platform.c | 1 + include/linux/soc/renesas/r9a06g032-sysctrl.h | 11 ++ 11 files changed, 310 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/dma/renesas,rzn1-dmamux.yaml create mode 100644 drivers/dma/dw/dmamux.c create mode 100644 include/linux/soc/renesas/r9a06g032-sysctrl.h