From patchwork Tue Dec 27 10:04:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ivan Bornyakov X-Patchwork-Id: 13082185 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84541C46467 for ; Tue, 27 Dec 2022 10:09:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231178AbiL0KHd (ORCPT ); Tue, 27 Dec 2022 05:07:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37086 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230201AbiL0KHa (ORCPT ); Tue, 27 Dec 2022 05:07:30 -0500 Received: from mail.pr-group.ru (mail.pr-group.ru [178.18.215.3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 755D964C3; Tue, 27 Dec 2022 02:07:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=metrotek.ru; s=mail; h=from:subject:date:message-id:to:cc:mime-version:content-transfer-encoding: in-reply-to:references; bh=PYDm95PWaADa9YxjFLIe4Cqpn1ITTd0IS1l03smDoZI=; b=NRKaVERjP8DPCHUa1B+i6P3ve/o20Ki43luqRob99yEHHPV3BdvQx8tteWZBssTlc19fpTU5j+6YM +HdiekDTphI0msuVJKGfQvw88BKqaoOXVWfN5jBn87HMA/T0BtmWEd9LZhylJhyY+fSbdmchmvc9kS VhelAq6A6RAWzFzd4hFUlgZVrX9Esw+s8kLBIPBb+4B+1hnQGY5OOtnDEcde+UO0IgLQ3IYgFuB7yv z9xowIiEbnf+5K2WCAsSjxJ8EKC+SQyLLcTnFwYk8YTeeQlUXTM73efdd38kxASJ4+wt+TyjtkBZKK b9/jxjbE3RK26+4+8pFhVqHDGWPccHw== X-Kerio-Anti-Spam: Build: [Engines: 2.16.5.1460, Stamp: 3], Multi: [Enabled, t: (0.000009,0.012572)], BW: [Enabled, t: (0.000022,0.000001)], RTDA: [Enabled, t: (0.089347), Hit: No, Details: v2.42.0; Id: 15.52ka2i.1gl9gprcr.3ma; mclb], total: 0(700) X-Footer: bWV0cm90ZWsucnU= Received: from localhost.localdomain ([78.37.162.181]) (authenticated user i.bornyakov@metrotek.ru) by mail.pr-group.ru with ESMTPSA (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256 bits)); Tue, 27 Dec 2022 13:07:11 +0300 From: Ivan Bornyakov To: Conor Dooley , Moritz Fischer , Wu Hao , Xu Yilun , Tom Rix , =?utf-8?q?Ilpo_J?= =?utf-8?q?=C3=A4rvinen?= Cc: Ivan Bornyakov , linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org, system@metrotek.ru Subject: [PATCH v3 3/3] fpga: microchip-spi: separate data frame write routine Date: Tue, 27 Dec 2022 13:04:50 +0300 Message-Id: <20221227100450.2257-4-i.bornyakov@metrotek.ru> X-Mailer: git-send-email 2.38.2 In-Reply-To: <20221227100450.2257-1-i.bornyakov@metrotek.ru> References: <20221227100450.2257-1-i.bornyakov@metrotek.ru> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fpga@vger.kernel.org mpf_ops_write() function writes bitstream data to the FPGA by a smaller frames. Introduce mpf_spi_frame_write() function which is for writing a single data frame and use it in mpf_ops_write(). No functional changes intended. Signed-off-by: Ivan Bornyakov Acked-by: Conor Dooley --- drivers/fpga/microchip-spi.c | 36 +++++++++++++++++++++++------------- 1 file changed, 23 insertions(+), 13 deletions(-) diff --git a/drivers/fpga/microchip-spi.c b/drivers/fpga/microchip-spi.c index 8d1d9476d0cc..ea92e5d106fa 100644 --- a/drivers/fpga/microchip-spi.c +++ b/drivers/fpga/microchip-spi.c @@ -274,9 +274,30 @@ static int mpf_ops_write_init(struct fpga_manager *mgr, return 0; } +static int mpf_spi_frame_write(struct mpf_priv *priv, const char *buf) +{ + struct spi_transfer xfers[2] = { + { + .tx_buf = &priv->tx, + .len = 1, + }, { + .tx_buf = buf, + .len = MPF_SPI_FRAME_SIZE, + }, + }; + int ret; + + ret = mpf_poll_status(priv, 0); + if (ret < 0) + return ret; + + priv->tx = MPF_SPI_FRAME; + + return spi_sync_transfer(priv->spi, xfers, ARRAY_SIZE(xfers)); +} + static int mpf_ops_write(struct fpga_manager *mgr, const char *buf, size_t count) { - struct spi_transfer xfers[2] = { 0 }; struct mpf_priv *priv = mgr->priv; struct device *dev = &mgr->dev; int ret, i; @@ -287,19 +308,8 @@ static int mpf_ops_write(struct fpga_manager *mgr, const char *buf, size_t count return -EINVAL; } - xfers[0].tx_buf = &priv->tx; - xfers[0].len = 1; - for (i = 0; i < count / MPF_SPI_FRAME_SIZE; i++) { - xfers[1].tx_buf = buf + i * MPF_SPI_FRAME_SIZE; - xfers[1].len = MPF_SPI_FRAME_SIZE; - - ret = mpf_poll_status(priv, 0); - if (ret >= 0) { - priv->tx = MPF_SPI_FRAME; - ret = spi_sync_transfer(priv->spi, xfers, ARRAY_SIZE(xfers)); - } - + ret = mpf_spi_frame_write(priv, buf + i * MPF_SPI_FRAME_SIZE); if (ret) { dev_err(dev, "Failed to write bitstream frame %d/%zu\n", i, count / MPF_SPI_FRAME_SIZE);