From patchwork Fri Jan 18 09:29:31 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?44Kw44Kn44Oz44O744Ki44Oz44O744Ob44Kh44Oz?= X-Patchwork-Id: 10769601 X-Patchwork-Delegate: geert@linux-m68k.org 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 661CC13BF for ; Fri, 18 Jan 2019 09:30:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 513302E16F for ; Fri, 18 Jan 2019 09:30:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 405D22E179; Fri, 18 Jan 2019 09:30:03 +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=unavailable 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 2853B2E16F for ; Fri, 18 Jan 2019 09:30:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726839AbfARJaB (ORCPT ); Fri, 18 Jan 2019 04:30:01 -0500 Received: from www3345.sakura.ne.jp ([49.212.235.55]:58021 "EHLO www3345.sakura.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726120AbfARJaB (ORCPT ); Fri, 18 Jan 2019 04:30:01 -0500 Received: from fsav405.sakura.ne.jp (fsav405.sakura.ne.jp [133.242.250.104]) by www3345.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id x0I9TqVB005315; Fri, 18 Jan 2019 18:29:52 +0900 (JST) (envelope-from na-hoan@jinso.co.jp) Received: from www3345.sakura.ne.jp (49.212.235.55) by fsav405.sakura.ne.jp (F-Secure/fsigk_smtp/530/fsav405.sakura.ne.jp); Fri, 18 Jan 2019 18:29:52 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/530/fsav405.sakura.ne.jp) Received: from localhost (p14010-ipadfx41marunouchi.tokyo.ocn.ne.jp [61.118.107.10]) (authenticated bits=0) by www3345.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id x0I9TjhQ005252 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 18 Jan 2019 18:29:52 +0900 (JST) (envelope-from na-hoan@jinso.co.jp) From: Nguyen An Hoan To: linux-renesas-soc@vger.kernel.org, broonie@kernel.org, geert+renesas@glider.be Cc: linux-spi@vger.kernel.org, kuninori.morimoto.gx@renesas.com, magnus.damm@gmail.com, yoshihiro.shimoda.uh@renesas.com, h-inayoshi@jinso.co.jp, nv-dung@jinso.co.jp, na-hoan@jinso.co.jp, cv-dong@jinso.co.jp Subject: [v2 PATCH 2/2] spi: sh-msiof: Use DMA if possible Date: Fri, 18 Jan 2019 18:29:31 +0900 Message-Id: <1547803771-9564-2-git-send-email-na-hoan@jinso.co.jp> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1547803771-9564-1-git-send-email-na-hoan@jinso.co.jp> References: <1547803771-9564-1-git-send-email-na-hoan@jinso.co.jp> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hoan Nguyen An Currently, this driver only supports feature for DMA 32-bits. In this case, only if the data length is divisible by 4 to use DMA, otherwise PIO will be used. This patch will suggest use the DMA 32-bits with 4bytes of words, then the remaining data will be transmitted by PIO mode. Signed-off-by: Hoan Nguyen An Reviewed-by: Geert Uytterhoeven Tested-by: Geert Uytterhoeven --- drivers/spi/spi-sh-msiof.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 351470b..617cdf3 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -937,17 +937,13 @@ static int sh_msiof_transfer_one(struct spi_master *master, unsigned int l = 0; if (tx_buf) - l = min(len, p->tx_fifo_size * 4); + l = min(round_down(len, 4), p->tx_fifo_size * 4); if (rx_buf) - l = min(len, p->rx_fifo_size * 4); + l = min(round_down(len, 4), p->rx_fifo_size * 4); if (bits <= 8) { - if (l & 3) - break; copy32 = copy_bswap32; } else if (bits <= 16) { - if (l & 3) - break; copy32 = copy_wswap32; } else { copy32 = copy_plain32;