From patchwork Fri Oct 30 12:11:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 11869415 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BC58A157C for ; Fri, 30 Oct 2020 12:11:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 88A23221E2 for ; Fri, 30 Oct 2020 12:11:24 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="udxx/hN4" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725808AbgJ3MLX (ORCPT ); Fri, 30 Oct 2020 08:11:23 -0400 Received: from esa1.microchip.iphmx.com ([68.232.147.91]:27517 "EHLO esa1.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725355AbgJ3MLX (ORCPT ); Fri, 30 Oct 2020 08:11:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1604059883; x=1635595883; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=cuDhUCtdldLHfggrlEohm+QuxC5tqtZ6ddFavHBOtlw=; b=udxx/hN4J5KrkyU0eR14M+eE3vP7kUVOeIj2uX9MJKxN7cqA8D9bTPIy rdAjsE9KISPi3ktx3SadtvNcMcwWI6OVXMZJE5C5Pr7aZQkicFy59KgzM rJITqgoMn/Y9vcMqe5o2oxvx3qRPYM9ayQPcHk6pHjfDl9YdaPFTKH8nK KMTQqy+dYV/jYuNcICtVCx8bZwzU5yNkj2YiUFhaZ9Om3RX8xxbLkiiY+ F+FLGbxj28q8uA37CtaDn346eG/XrSFq7c6Uqvg74segFr9NnOX2HGPwU kqMFJE6adX5qkSN3hmm2AHkF/iSV2/tvGqE3fOQbNPnHk4BJmg1bQyY8H g==; IronPort-SDR: uowKYC6/GYLYCBbpzJD24CQMWAiD8D1Zx8Vjt10jhK5/xctj0+wyaT5vQ96bxztik/r3U5kqmt moBVaxgSKnNtNnIgu2dT5QFrsuJNGgP92f/yHiwjINxOEKa9eTy5llr15XUfOoYRpdULLwu9La TJcJjwUdyUBIyDbpQzrUxk7/d1n7Mzn912liLNvTl2fVp3HB7nNkNWnHH4WnMRIRhKBSHe+b4x RFtstUURzIzu44mh21NH5i8vx8u466Z8DTp8TtzQgqZlpqcVIvyvDQPXvJaeVmV/NtrMXGlWKC 2Pg= X-IronPort-AV: E=Sophos;i="5.77,433,1596524400"; d="scan'208";a="101575811" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 30 Oct 2020 05:11:22 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Fri, 30 Oct 2020 05:11:22 -0700 Received: from atudor-ThinkPad-T470p.amer.actel.com (10.10.115.15) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Fri, 30 Oct 2020 05:11:20 -0700 From: Tudor Ambarus To: CC: , , , , , Tudor Ambarus Subject: [PATCH] spi: atmel: Downgrade to dev_dbg when dma_request_chan() fails Date: Fri, 30 Oct 2020 14:11:16 +0200 Message-ID: <20201030121116.869105-1-tudor.ambarus@microchip.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org The IP's DMA capabilities are described in the SoC dtsi, to spare users duplicating the DMA bindings in their board device tree. Users that don't want to use DMA, have to overwrite the DMA bindings in their board device tree. An example is: commit ddcdaeb88242 ("ARM: dts: at91: sama5d2: Add DMA bindings for the SPI and UART flx4 functions") When the DMA bindings are overwritten, one could see on the console: atmel_spi fc018400.spi: error -ENODEV: No TX DMA channel, DMA is disabled atmel_spi fc018400.spi: Atmel SPI Controller using PIO only Choosing to not use DMA is not a reason to print an error message. More, the user is already informed when PIO is used: "Atmel SPI Controller using PIO only". Downgrade to dev_dbg when dma_request_chan() fails. Signed-off-by: Tudor Ambarus --- drivers/spi/spi-atmel.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index 0e5e64a80848..948396b382d7 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -512,8 +512,8 @@ static int atmel_spi_configure_dma(struct spi_master *master, master->dma_tx = dma_request_chan(dev, "tx"); if (IS_ERR(master->dma_tx)) { - err = dev_err_probe(dev, PTR_ERR(master->dma_tx), - "No TX DMA channel, DMA is disabled\n"); + err = PTR_ERR(master->dma_tx); + dev_dbg(dev, "No TX DMA channel, DMA is disabled\n"); goto error_clear; } @@ -524,7 +524,7 @@ static int atmel_spi_configure_dma(struct spi_master *master, * No reason to check EPROBE_DEFER here since we have already * requested tx channel. */ - dev_err(dev, "No RX DMA channel, DMA is disabled\n"); + dev_dbg(dev, "No RX DMA channel, DMA is disabled\n"); goto error; }