From patchwork Tue Jun 27 09:45:22 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Varadarajan Narayanan X-Patchwork-Id: 9811221 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 9EFB160351 for ; Tue, 27 Jun 2017 09:49:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BD99D25404 for ; Tue, 27 Jun 2017 09:49:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B27DC28613; Tue, 27 Jun 2017 09:49:25 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID 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 5F45025404 for ; Tue, 27 Jun 2017 09:49:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752878AbdF0JtX (ORCPT ); Tue, 27 Jun 2017 05:49:23 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:51402 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752656AbdF0JqC (ORCPT ); Tue, 27 Jun 2017 05:46:02 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 80526607E2; Tue, 27 Jun 2017 09:46:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1498556761; bh=1WI4syFaX/pxQNk+M07T7o7PluWVU8oGsGrBsKmCZQY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YlPEeaXUbxfrAVaU3AC5iA7Dd26rJXatE1S0f6Xlr8PAN5qUo8dWsBOi5bReZyTMr wUL9ETpWQVOsavUVZoKlVSZe0QF4FRMIqj4426vwldBam6K3dw4RW9AbbpWztFLWiT HaLp+TqGoPKzHiABMZrnjKyMeBeltRdPwpposYnA= Received: from varda-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: varada@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id DB7CA607C5; Tue, 27 Jun 2017 09:45:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1498556761; bh=1WI4syFaX/pxQNk+M07T7o7PluWVU8oGsGrBsKmCZQY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YlPEeaXUbxfrAVaU3AC5iA7Dd26rJXatE1S0f6Xlr8PAN5qUo8dWsBOi5bReZyTMr wUL9ETpWQVOsavUVZoKlVSZe0QF4FRMIqj4426vwldBam6K3dw4RW9AbbpWztFLWiT HaLp+TqGoPKzHiABMZrnjKyMeBeltRdPwpposYnA= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org DB7CA607C5 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=varada@codeaurora.org From: Varadarajan Narayanan To: broonie@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, andy.gross@linaro.org, david.brown@linaro.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org Cc: Varadarajan Narayanan Subject: [PATCH v4 05/14] spi: qup: Place the QUP in run mode before DMA Date: Tue, 27 Jun 2017 15:15:22 +0530 Message-Id: <1498556731-13087-6-git-send-email-varada@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1498556731-13087-1-git-send-email-varada@codeaurora.org> References: <1498556731-13087-1-git-send-email-varada@codeaurora.org> 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 Signed-off-by: Andy Gross Signed-off-by: Varadarajan Narayanan --- drivers/spi/spi-qup.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c index d3ccf53..0683e47 100644 --- a/drivers/spi/spi-qup.c +++ b/drivers/spi/spi-qup.c @@ -336,6 +336,14 @@ static int spi_qup_do_dma(struct spi_master *master, struct spi_transfer *xfer, struct spi_qup *qup = spi_master_get_devdata(master); int ret; + /* before issuing the descriptors, set the QUP to run */ + ret = spi_qup_set_state(qup, QUP_STATE_RUN); + if (ret) { + dev_warn(qup->dev, "%s(%d): cannot set RUN state\n", + __func__, __LINE__); + return ret; + } + if (xfer->rx_buf) { ret = spi_qup_prep_sg(master, xfer, DMA_DEV_TO_MEM, spi_qup_dma_done, &qup->rxc); @@ -383,6 +391,13 @@ static int spi_qup_do_pio(struct spi_master *master, struct spi_transfer *xfer, spi_qup_fifo_write(qup, xfer); + ret = spi_qup_set_state(qup, QUP_STATE_RUN); + if (ret) { + dev_warn(qup->dev, "%s(%d): cannot set RUN state\n", + __func__, __LINE__); + return ret; + } + if (!wait_for_completion_timeout(&qup->done, timeout)) return -ETIMEDOUT;