From patchwork Wed Mar 12 18:36:09 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Folker Schwesinger X-Patchwork-Id: 14013765 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 22AB8C28B2E for ; Wed, 12 Mar 2025 18:39:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Subject:Date:From:To:Cc: Message-Id:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=jK9L1dvLd5m9lPWVnJzTvy05KzJHfRiYwXisKwJCxs4=; b=Yn56zuD8FG/NnsOpusvizPpQN3 ZE0Uzg9O7NeDkDvjlNOJQhcCsjXoN1Mdz4UzEwLKgmCC9FBpSBNk38cZDxSwX4IOqHeHpPrjAYKXr fqFH9fBZpiLhQ1CyjgPR/Ui68WAWEvg9iqJP4IzOx0eykcDa+7oim+BB8RqXsbvQjoGo6Lb4/bBIb EQW0nNmLtyNd5X2IYWpaxcXbGaL71cMLyObSLREnIygEz+H1WL5cRt1YvXkFtQmYAZJtK7lZnK3Ol KRR7cPKPX9HFQC6mfBQZMmIspmwcTCH8cG+FUwtQdPGJePAcAzDEqoFKqI3bXbXJIv3zJSsMrpeyj nFyGbMGQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tsQza-00000009Gfv-3aKw; Wed, 12 Mar 2025 18:39:46 +0000 Received: from www522.your-server.de ([195.201.215.122]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tsQwG-00000009GIY-2R76 for linux-arm-kernel@lists.infradead.org; Wed, 12 Mar 2025 18:36:22 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=folker-schwesinger.de; s=default2212; h=Subject:Date:From:To:Cc:Message-Id: Sender:Reply-To:MIME-Version:Content-Type:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References; bh=jK9L1dvLd5m9lPWVnJzTvy05KzJHfRiYwXisKwJCxs4=; b=md0LVs6BQzj1X1zReYSbbEAf3F 694zkVxIQz469+06JS7no5VO9Xie9h5/g3wgUi4gYLzt0KypJIZQittYRkkEq+jVYHM2aVhUHNiu3 OkuY+7p+5XznH1qopCzq+h1N+1dbk4T0En1TYn90QGdVKxfOVOUl/h6HePMwJfQazJQqszB/Supj4 8dT3Y7sJ0iBeyooSjMT1f89XAsLNj1ymYmzRgDUUdapPUS4wPPNG2b8g1ibpcVgMCbhNVUH7XRfAU M3rzoCFoTbYX67wwQkwb71cJUvknsIKAzjQDUE1BL2+dauRySCSdQeMG/7EVgY/BoU6uZM8TuaNZX k9w1llZA==; Received: from sslproxy03.your-server.de ([88.198.220.132]) by www522.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96.2) (envelope-from ) id 1tsQw8-000IGP-0w; Wed, 12 Mar 2025 19:36:12 +0100 Received: from [185.209.196.170] (helo=localhost) by sslproxy03.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tsQw8-000JzK-14; Wed, 12 Mar 2025 19:36:11 +0100 Message-Id: Cc: "Kedareswara rao Appana" , , , To: "Vinod Koul" , "Michal Simek" , "Jernej Skrabec" , "Manivannan Sadhasivam" , "Krzysztof Kozlowski" , =?utf-8?q?Uwe_Klein?= =?utf-8?q?e-K=C3=B6nig?= , "Marek Vasut" From: "Folker Schwesinger" Date: Wed, 12 Mar 2025 19:36:09 +0100 Subject: [PATCH 0/1] dmaengine: xilinx_dma: Set dma_device.directions X-Authenticated-Sender: dev@folker-schwesinger.de X-Virus-Scanned: Clear (ClamAV 1.0.7/27575/Wed Mar 12 09:37:42 2025) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250312_113620_909434_75803630 X-CRM114-Status: GOOD ( 10.23 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Currently it is not possible to use the Xilinx DMA driver as a backend for IIO drivers. Setting up IIO DMA buffers with devm_iio_dmaengine_buffer_setup() fails because dma_get_slave_caps() always returns -ENXIO. The reason is that the Xilinx DMA driver does not set the directions field in struct dma_device, which is checked in dma_get_slave_caps(). This patch fixes this issue. It basically is a partial resend of this patch [1], modified to apply on dmaengine->next. It was discussed back in 2018 in this thread [2]. As I'm quite new to the kernel dev process, I'm not sure if I should have included any tags to give credit to the original patch author. [1]: https://patchwork.kernel.org/project/linux-dmaengine/patch/1514961731-1916-2-git-send-email-appanad@xilinx.com/ [2]: https://lore.kernel.org/lkml/20180111062111.GH18649@localhost/T/ Folker Schwesinger (1): dmaengine: xilinx_dma: Set dma_device.directions drivers/dma/xilinx/xilinx_dma.c | 2 ++ 1 file changed, 2 insertions(+) base-commit: 6565439894570a07b00dba0b739729fe6b56fba4