From patchwork Tue May 23 14:35:28 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Jiada" X-Patchwork-Id: 9742877 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 6ECB2601C2 for ; Tue, 23 May 2017 14:36:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 61A84262FF for ; Tue, 23 May 2017 14:36:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 539FC28446; Tue, 23 May 2017 14:36:17 +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=-6.9 required=2.0 tests=BAYES_00,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 02982262FF for ; Tue, 23 May 2017 14:36:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935008AbdEWOgC (ORCPT ); Tue, 23 May 2017 10:36:02 -0400 Received: from relay1.mentorg.com ([192.94.38.131]:63570 "EHLO relay1.mentorg.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965197AbdEWOfk (ORCPT ); Tue, 23 May 2017 10:35:40 -0400 Received: from nat-ies.mentorg.com ([192.94.31.2] helo=SVR-IES-FEM-01.mgc.mentorg.com) by relay1.mentorg.com with esmtp id 1dDAuP-0005m7-J2 from Jiada_Wang@mentor.com ; Tue, 23 May 2017 07:35:37 -0700 Received: from ubuntu.localdomain (137.202.0.76) by SVR-IES-FEM-01.mgc.mentorg.com (137.202.0.104) with Microsoft SMTP Server id 14.3.224.2; Tue, 23 May 2017 15:35:35 +0100 From: To: CC: , , Jiada Wang Subject: [PATCH linux-next v2 1/2] spi: imx: only allow dynamic burst in PIO mode Date: Tue, 23 May 2017 07:35:28 -0700 Message-ID: <1495550129-3489-2-git-send-email-jiada_wang@mentor.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1495550129-3489-1-git-send-email-jiada_wang@mentor.com> References: <1495550129-3489-1-git-send-email-jiada_wang@mentor.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 From: Jiada Wang Currently only PIO mode supports dynamic burst length adjust, in DMA mode, bpw (bytes per word) value still has to be used as burst length, other wise transfer issue will be caused. This patch avoid using dynamic burst in DMA mode by set reset dynamic_burst when DMA mode is used. Signed-off-by: Jiada Wang Reported-and-tested-by: Fabio Estevam --- drivers/spi/spi-imx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index 19b30cf..2768e64 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -242,6 +242,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi, return false; spi_imx->wml = i; + spi_imx->dynamic_burst = 0; return true; }