From nobody Tue Sep 16 20:08:27 2025 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 6C063C4167B for ; Fri, 30 Dec 2022 09:32:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234854AbiL3JcW (ORCPT ); Fri, 30 Dec 2022 04:32:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234805AbiL3JcQ (ORCPT ); Fri, 30 Dec 2022 04:32:16 -0500 Received: from mail.pr-group.ru (mail.pr-group.ru [178.18.215.3]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A40B1A20F; Fri, 30 Dec 2022 01:32:12 -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=/ihIkO5snmzqBy+4+LJopWc7knE0i7yPw81w1MiqSmQ=; b=e/uOV8CpIKBh6A8A0UK17zK1onjA8l07TCIrdxGMNAmYX/YsXNUvFAFKZliDyUKTvjH3U6ga2ZNA7 Mq4Zr2uMh4xB7fSEE+HcOuhJLmpVbHWETu2ZXmWHn4I6wsbMM6QmGKLqzCuuc6c/SXCPC4jcsGSZLl IT+oeWVUzREv0eCVcOIoKc21d1Zu/9OiY4q1j/DfOOpgc5eTyqH7ydvuDc1OpXLhUrUgBNpLAfKAwx U1bAtvyRCU1k9uhhSQRupAqPwlPtVY3/bz1/M5e8PaScSSy/h3tOaA62JLbfypCQGYWWKp968LMOvb yYzLxL9xfZ9AnRMzssj+F0E46Vy+79A== X-Kerio-Anti-Spam: Build: [Engines: 2.16.5.1460, Stamp: 3], Multi: [Enabled, t: (0.000010,0.010605)], BW: [Enabled, t: (0.000030,0.000002)], RTDA: [Enabled, t: (0.085502), Hit: No, Details: v2.42.0; Id: 15.52k84j.1glh5vaj6.26g; 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)); Fri, 30 Dec 2022 12:31:52 +0300 From: Ivan Bornyakov To: linux-fpga@vger.kernel.org Cc: Ivan Bornyakov , Conor Dooley , Moritz Fischer , Wu Hao , Xu Yilun , Tom Rix , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-kernel@vger.kernel.org, system@metrotek.ru Subject: [PATCH v5 3/3] fpga: microchip-spi: separate data frame write routine Date: Fri, 30 Dec 2022 12:29:22 +0300 Message-Id: <20221230092922.18822-4-i.bornyakov@metrotek.ru> X-Mailer: git-send-email 2.38.2 In-Reply-To: <20221230092922.18822-1-i.bornyakov@metrotek.ru> References: <20221230092922.18822-1-i.bornyakov@metrotek.ru> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" 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 Acked-by: Xu Yilun --- 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 137fafdf57a6..d6070e7f5205 100644 --- a/drivers/fpga/microchip-spi.c +++ b/drivers/fpga/microchip-spi.c @@ -280,9 +280,30 @@ static int mpf_ops_write_init(struct fpga_manager *mgr, return 0; } =20 +static int mpf_spi_frame_write(struct mpf_priv *priv, const char *buf) +{ + struct spi_transfer xfers[2] =3D { + { + .tx_buf =3D &priv->tx, + .len =3D 1, + }, { + .tx_buf =3D buf, + .len =3D MPF_SPI_FRAME_SIZE, + }, + }; + int ret; + + ret =3D mpf_poll_status(priv, 0); + if (ret < 0) + return ret; + + priv->tx =3D 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] =3D { 0 }; struct mpf_priv *priv =3D mgr->priv; struct device *dev =3D &mgr->dev; int ret, i; @@ -293,19 +314,8 @@ static int mpf_ops_write(struct fpga_manager *mgr, con= st char *buf, size_t count return -EINVAL; } =20 - xfers[0].tx_buf =3D &priv->tx; - xfers[0].len =3D 1; - for (i =3D 0; i < count / MPF_SPI_FRAME_SIZE; i++) { - xfers[1].tx_buf =3D buf + i * MPF_SPI_FRAME_SIZE; - xfers[1].len =3D MPF_SPI_FRAME_SIZE; - - ret =3D mpf_poll_status(priv, 0); - if (ret >=3D 0) { - priv->tx =3D MPF_SPI_FRAME; - ret =3D spi_sync_transfer(priv->spi, xfers, ARRAY_SIZE(xfers)); - } - + ret =3D 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); --=20 2.38.2