From patchwork Tue Feb 23 09:23:57 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sascha Hauer X-Patchwork-Id: 8389731 Return-Path: X-Original-To: patchwork-linux-spi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id B61B69F88A for ; Tue, 23 Feb 2016 09:24:17 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D15AD2020F for ; Tue, 23 Feb 2016 09:24:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C36FF202B8 for ; Tue, 23 Feb 2016 09:24:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751663AbcBWJYM (ORCPT ); Tue, 23 Feb 2016 04:24:12 -0500 Received: from metis.ext.4.pengutronix.de ([92.198.50.35]:47013 "EHLO metis.ext.4.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751744AbcBWJYD (ORCPT ); Tue, 23 Feb 2016 04:24:03 -0500 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1aY9CL-0000qb-Ud; Tue, 23 Feb 2016 10:24:01 +0100 Received: from sha by dude.hi.pengutronix.de with local (Exim 4.86) (envelope-from ) id 1aY9CL-000398-L0; Tue, 23 Feb 2016 10:24:01 +0100 From: Sascha Hauer To: linux-spi@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Mark Brown , Anton Bondarenko , Sascha Hauer Subject: [PATCH 8/9] spi: imx: set MX51_ECSPI_CTRL_SMC bit in setup function Date: Tue, 23 Feb 2016 10:23:57 +0100 Message-Id: <1456219438-21205-9-git-send-email-s.hauer@pengutronix.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1456219438-21205-1-git-send-email-s.hauer@pengutronix.de> References: <1456219438-21205-1-git-send-email-s.hauer@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: sha@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-spi@vger.kernel.org Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Now that the config function knows whether we are doing DMA or not we can do the necessary register setup in the config function and no longer have to do this in the trigger function. With this the trigger function becomes a no-op for DMA, so instead of testing if we are doing DMA or not in the trigger function we simply no longer call it in the DMA case. Signed-off-by: Sascha Hauer --- drivers/spi/spi-imx.c | 21 ++++++--------------- 1 file changed, 6 insertions(+), 15 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 96e32d4..91890b2 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -106,7 +106,6 @@ struct spi_imx_data { unsigned int txfifo; /* number of words pushed in tx FIFO */ /* DMA */ - unsigned int dma_finished; bool usedma; u32 wml; struct completion dma_rx_completion; @@ -324,14 +323,10 @@ static void __maybe_unused mx51_ecspi_intctrl(struct spi_imx_data *spi_imx, int static void __maybe_unused mx51_ecspi_trigger(struct spi_imx_data *spi_imx) { - u32 reg = readl(spi_imx->base + MX51_ECSPI_CTRL); + u32 reg; - if (!spi_imx->usedma) - reg |= MX51_ECSPI_CTRL_XCH; - else if (!spi_imx->dma_finished) - reg |= MX51_ECSPI_CTRL_SMC; - else - reg &= ~MX51_ECSPI_CTRL_SMC; + reg = readl(spi_imx->base + MX51_ECSPI_CTRL); + reg |= MX51_ECSPI_CTRL_XCH; writel(reg, spi_imx->base + MX51_ECSPI_CTRL); } @@ -371,6 +366,9 @@ static int __maybe_unused mx51_ecspi_config(struct spi_imx_data *spi_imx, if (config->mode & SPI_CS_HIGH) cfg |= MX51_ECSPI_CONFIG_SSBPOL(config->cs); + if (spi_imx->usedma) + ctrl |= MX51_ECSPI_CTRL_SMC; + /* CTRL register always go first to bring out controller from reset */ writel(ctrl, spi_imx->base + MX51_ECSPI_CTRL); @@ -1012,9 +1010,6 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, reinit_completion(&spi_imx->dma_rx_completion); reinit_completion(&spi_imx->dma_tx_completion); - /* Trigger the cspi module. */ - spi_imx->dma_finished = 0; - /* * Set these order to avoid potential RX overflow. The overflow may * happen if we enable SPI HW before starting RX DMA due to rescheduling @@ -1025,7 +1020,6 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, */ dma_async_issue_pending(master->dma_rx); dma_async_issue_pending(master->dma_tx); - spi_imx->devtype_data->trigger(spi_imx); transfer_timeout = spi_imx_calculate_timeout(spi_imx, transfer->len); @@ -1046,9 +1040,6 @@ static int spi_imx_dma_transfer(struct spi_imx_data *spi_imx, } } - spi_imx->dma_finished = 1; - spi_imx->devtype_data->trigger(spi_imx); - if (!timeout) ret = -ETIMEDOUT; else