From patchwork Mon Mar 18 14:41:43 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 10857849 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 087B117EF for ; Mon, 18 Mar 2019 14:41:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E08E0293FB for ; Mon, 18 Mar 2019 14:41:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DE4FE293F7; Mon, 18 Mar 2019 14:41:49 +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=-7.9 required=2.0 tests=BAYES_00,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 7272129491 for ; Mon, 18 Mar 2019 14:41:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727365AbfCROlt (ORCPT ); Mon, 18 Mar 2019 10:41:49 -0400 Received: from mga14.intel.com ([192.55.52.115]:24143 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727550AbfCROlt (ORCPT ); Mon, 18 Mar 2019 10:41:49 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Mar 2019 07:41:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.58,494,1544515200"; d="scan'208";a="308198278" Received: from black.fi.intel.com ([10.237.72.28]) by orsmga005.jf.intel.com with ESMTP; 18 Mar 2019 07:41:46 -0700 Received: by black.fi.intel.com (Postfix, from userid 1003) id 2DE01FA; Mon, 18 Mar 2019 16:41:45 +0200 (EET) From: Andy Shevchenko To: Daniel Mack , Haojian Zhuang , Robert Jarzmik , linux-arm-kernel@lists.infradead.org, Mark Brown , linux-spi@vger.kernel.org, Jarkko Nikula Cc: Andy Shevchenko Subject: [PATCH v3 1/2] spi: pxa2xx: Introduce DMA burst size support Date: Mon, 18 Mar 2019 16:41:43 +0200 Message-Id: <20190318144144.42367-2-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190318144144.42367-1-andriy.shevchenko@linux.intel.com> References: <20190318144144.42367-1-andriy.shevchenko@linux.intel.com> 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 Some masters may have different DMA burst size than hard coded default. In such case respect the value given by DMA burst size provided via platform data. Signed-off-by: Andy Shevchenko --- drivers/spi/spi-pxa2xx-dma.c | 4 +++- drivers/spi/spi-pxa2xx-pci.c | 4 ++++ drivers/spi/spi-pxa2xx.c | 1 + include/linux/spi/pxa2xx_spi.h | 1 + 4 files changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c index 15592598273e..17424cc98006 100644 --- a/drivers/spi/spi-pxa2xx-dma.c +++ b/drivers/spi/spi-pxa2xx-dma.c @@ -239,13 +239,15 @@ int pxa2xx_spi_set_dma_burst_and_threshold(struct chip_data *chip, u32 *threshold) { struct pxa2xx_spi_chip *chip_info = spi->controller_data; + struct driver_data *drv_data = spi_controller_get_devdata(spi->controller); + u32 dma_burst_size = drv_data->master_info->dma_burst_size; /* * If the DMA burst size is given in chip_info we use that, * otherwise we use the default. Also we use the default FIFO * thresholds for now. */ - *burst_code = chip_info ? chip_info->dma_burst_size : 1; + *burst_code = chip_info ? chip_info->dma_burst_size : dma_burst_size; *threshold = SSCR1_RxTresh(RX_THRESH_DFLT) | SSCR1_TxTresh(TX_THRESH_DFLT); diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c index 1727fdfbac28..33029ca0687a 100644 --- a/drivers/spi/spi-pxa2xx-pci.c +++ b/drivers/spi/spi-pxa2xx-pci.c @@ -35,6 +35,8 @@ struct pxa_spi_info { void *tx_param; void *rx_param; + int dma_burst_size; + int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c); }; @@ -133,6 +135,7 @@ static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c) rx->dma_dev = &dma_dev->dev; c->dma_filter = lpss_dma_filter; + c->dma_burst_size = 8; return 0; } @@ -223,6 +226,7 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev, spi_pdata.tx_param = c->tx_param; spi_pdata.rx_param = c->rx_param; spi_pdata.enable_dma = c->rx_param && c->tx_param; + spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1; ssp = &spi_pdata.ssp; ssp->phys_base = pci_resource_start(dev, 0); diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index b6ddba833d02..461c6b796b8f 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -1564,6 +1564,7 @@ pxa2xx_spi_init_pdata(struct platform_device *pdev) pdata->is_slave = of_property_read_bool(pdev->dev.of_node, "spi-slave"); pdata->num_chipselect = 1; pdata->enable_dma = true; + pdata->dma_burst_size = 1; return pdata; } diff --git a/include/linux/spi/pxa2xx_spi.h b/include/linux/spi/pxa2xx_spi.h index c1c59473cef9..6005f0126631 100644 --- a/include/linux/spi/pxa2xx_spi.h +++ b/include/linux/spi/pxa2xx_spi.h @@ -25,6 +25,7 @@ struct dma_chan; struct pxa2xx_spi_controller { u16 num_chipselect; u8 enable_dma; + u8 dma_burst_size; bool is_slave; /* DMA engine specific config */