From patchwork Wed Nov 21 11:27:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Radu Pirea X-Patchwork-Id: 10692461 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3B6811869 for ; Wed, 21 Nov 2018 11:39:18 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 28CA82B6FF for ; Wed, 21 Nov 2018 11:39:18 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1CBA42B90B; Wed, 21 Nov 2018 11:39:18 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B829B2B6FF for ; Wed, 21 Nov 2018 11:39:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729778AbeKUWNU (ORCPT ); Wed, 21 Nov 2018 17:13:20 -0500 Received: from mail-sender200.upb.ro ([141.85.13.200]:38924 "EHLO mx.upb.ro" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729259AbeKUWNU (ORCPT ); Wed, 21 Nov 2018 17:13:20 -0500 Received: from mx.upb.ro (localhost [127.0.0.1]) by mx.upb.ro (Postfix) with ESMTPS id 9EC39B560074; Wed, 21 Nov 2018 13:28:53 +0200 (EET) Received: from localhost (localhost [127.0.0.1]) by mx.upb.ro (Postfix) with ESMTP id 813ECB56006E; Wed, 21 Nov 2018 13:28:53 +0200 (EET) DKIM-Filter: OpenDKIM Filter v2.10.3 mx.upb.ro 813ECB56006E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=upb.ro; s=96342B8A-77E4-11E5-BA93-D93D0963A2DF; t=1542799733; bh=HLlA+Riagk5howXjCVz0hHv2LwkhoNtzyJSegrw99/c=; h=From:To:Date:Message-Id:MIME-Version; b=e+sBAAku//vG/+1DTZlYDHPfiAZty+gAZ4u9dh81eHXByvZx0M0yxuAQ50D+kKdN0 hKeH0kRRiZ+LA72TbztOmTSppHY42q2hbuOwZaL+eiSQHURADE8hwfdWi0oBoMgWFr DyZ7KNE35odDZousdDCNlf7OzsZPtVZsT52a709c= Received: from mx.upb.ro ([127.0.0.1]) by localhost (mx.upb.ro [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id Vb-unI9kuRkR; Wed, 21 Nov 2018 13:28:53 +0200 (EET) Received: from asus-rog.localdomain (arh.pub.ro [141.85.160.17]) by mx.upb.ro (Postfix) with ESMTPSA id 4F534B560065; Wed, 21 Nov 2018 13:28:53 +0200 (EET) From: Radu Pirea To: richard.genoud@gmail.com, lee.jones@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, nicolas.ferre@microchip.com, alexandre.belloni@bootlin.com, ludovic.desroches@microchip.co, broonie@kernel.org Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Radu Pirea Subject: [PATCH 0/3] Add PM and DMA support for AT91 USART as SPI Date: Wed, 21 Nov 2018 13:27:29 +0200 Message-Id: <20181121112732.15690-1-radu_nicolae.pirea@upb.ro> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Hi, This patch series improves the SPI driver for AT91 USART IP and adds support for DMA transfers, updates the bindings of driver and PM callback functions. I decided to use DMA only for transfers long than 16 bytes. DMA setup introduces a little overhead and is better to use PIO for short transfers. Radu Pirea (3): spi: at91-usart: add power management support dt-bindings: mfd: atmel-usart: add DMA bindings for SPI mode spi: at91-usart: add DMA support .../devicetree/bindings/mfd/atmel-usart.txt | 15 +- drivers/spi/spi-at91-usart.c | 284 +++++++++++++++++- 2 files changed, 292 insertions(+), 7 deletions(-)