From patchwork Thu Mar 29 18:59:05 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Suloev X-Patchwork-Id: 10316077 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 89922602D6 for ; Thu, 29 Mar 2018 19:02:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 710392A4AF for ; Thu, 29 Mar 2018 19:02:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6EC5D2A57F; Thu, 29 Mar 2018 19:02:48 +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=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B60FA2A5E2 for ; Thu, 29 Mar 2018 19:01:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=KaTYZmsBv5pSvSS23QpjQeaXTG0dkPmRSMXo2yiE79c=; b=oktddOXthVkjSIiXH+79kiet3b JIGpRr8S8JqnqIVn6EqLBq8A5+i7aXCh30/ysirpGpB0MgKEoQ5CpnCdDxAx6aETdDP4MdbWCihbj 4get5T42PB2EgZdZwf/aonYRP6boBzRofc8ZrDMBP1CtAzveOE04iaBQlFIeM27pvnN6MinmgCVDg 3mFSNO7jMjazcnn0z7IMjVndTIDNr33j1CDOw6Paceso6b4/f9HoytO6XoJvuGaEqlZgzSbMiS1DN DgmiZnp1C+XBmZieN8Vhhtkkdc3q/ulllhzzqZpZlDVE5hasz4E0Y4PeQgbfG58+WZrkhoFy/O37n jn6cf+UQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1f1cnb-0000AH-9p; Thu, 29 Mar 2018 19:01:23 +0000 Received: from smtp60.i.mail.ru ([217.69.128.40]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1f1clo-0006SK-CG for linux-arm-kernel@lists.infradead.org; Thu, 29 Mar 2018 18:59:36 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=orpaltech.com; s=mailru; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=QjltLzvf9EF5CDPztnxzcjXWXuV8C81SS0r7JTmsfk8=; b=joGCZvhH/npAyAX6B52Dw5LVUDmspv8DuOPGP8vJ3c4WlWMWvo61+MHhFMUfYqfqxyWfmqN25M91ijDRwlKqMHo0QJ1Qfryk2SnfQ1tT/HgR/umxGC+Y5Eb8RSTT3wSK/tHKligXwkMsVUR7UY8PNf3i2rTNY9u2Xfe72CdJT8Q=; Received: by smtp60.i.mail.ru with esmtpa (envelope-from ) id 1f1cld-0005P6-OY; Thu, 29 Mar 2018 21:59:22 +0300 From: Sergey Suloev To: Mark Brown , Maxime Ripard , Chen-Yu Tsai Subject: [PATCH 4/6] spi: sun4i: use completion provided by SPI core driver Date: Thu, 29 Mar 2018 21:59:05 +0300 Message-Id: <20180329185907.27281-5-ssuloev@orpaltech.com> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180329185907.27281-1-ssuloev@orpaltech.com> References: <20180329185907.27281-1-ssuloev@orpaltech.com> Authentication-Results: smtp60.i.mail.ru; auth=pass smtp.auth=ssuloev@orpaltech.com smtp.mailfrom=ssuloev@orpaltech.com X-7FA49CB5: 0D63561A33F958A5BCFC2B28FCD39CD6A67B693F76D0AEE7FAA6AC1F98F6358A725E5C173C3A84C3ADE50F0DA4A4E48CBF269F2BE9530C73157381330E1A1978C4224003CC836476C0CAF46E325F83A50BF2EBBBDD9D6B0F05F538519369F3743B503F486389A921A5CC5B56E945C8DA X-Mailru-Sender: C5364AD02485212F3ACDC11E67D84917A0EC09878A2918AC3D100BC6526AF6D5069BFC61DABEEB110841D3AAAB1726C63DDE9B364B0DF289264D2CD8C2503E8C22A194DADEED8EEDCA01A23BA9CD1BE7ED14614B50AE0675 X-Mras: OK X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180329_115932_603362_4B10A9C0 X-CRM114-Status: GOOD ( 12.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sergey Suloev , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-spi@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP As long as the completion already provided by the SPI core then there is no need to waste extra-memory on this. Also a waiting function was added to avoid code duplication. Signed-off-by: Sergey Suloev --- drivers/spi/spi-sun4i.c | 62 ++++++++++++++++++++++++++++--------------------- 1 file changed, 35 insertions(+), 27 deletions(-) diff --git a/drivers/spi/spi-sun4i.c b/drivers/spi/spi-sun4i.c index 2d716f1..4f24e12 100644 --- a/drivers/spi/spi-sun4i.c +++ b/drivers/spi/spi-sun4i.c @@ -92,8 +92,6 @@ struct sun4i_spi { struct clk *hclk; struct clk *mclk; - struct completion done; - const u8 *tx_buf; u8 *rx_buf; int len; @@ -213,13 +211,36 @@ static size_t sun4i_spi_max_transfer_size(struct spi_device *spi) return SUN4I_FIFO_DEPTH; } +static int sun4i_spi_wait_for_transfer(struct spi_device *spi, + struct spi_transfer *tfr) +{ + struct spi_master *master = spi->master; + unsigned int start, end, tx_time; + unsigned int timeout; + + /* calc required timeout from given speed & len values */ + tx_time = max(tfr->len * 8 * 2 / (tfr->speed_hz / 1000), 100U); + start = jiffies; + timeout = wait_for_completion_timeout(&master->xfer_completion, + msecs_to_jiffies(tx_time)); + end = jiffies; + if (!timeout) { + dev_warn(&master->dev, + "%s: timeout transferring %u bytes@%iHz for %i(%i)ms", + dev_name(&spi->dev), tfr->len, tfr->speed_hz, + jiffies_to_msecs(end - start), tx_time); + return -ETIMEDOUT; + } + + return 0; +} + static int sun4i_spi_transfer_one(struct spi_master *master, struct spi_device *spi, struct spi_transfer *tfr) { struct sun4i_spi *sspi = spi_master_get_devdata(master); - unsigned int mclk_rate, div, timeout; - unsigned int start, end, tx_time; + unsigned int mclk_rate, div; unsigned int tx_len = 0; int ret = 0; u32 reg; @@ -228,7 +249,6 @@ static int sun4i_spi_transfer_one(struct spi_master *master, if (tfr->len > SUN4I_FIFO_DEPTH) return -EMSGSIZE; - reinit_completion(&sspi->done); sspi->tx_buf = tfr->tx_buf; sspi->rx_buf = tfr->rx_buf; sspi->len = tfr->len; @@ -328,22 +348,8 @@ static int sun4i_spi_transfer_one(struct spi_master *master, reg = sun4i_spi_read(sspi, SUN4I_CTL_REG); sun4i_spi_write(sspi, SUN4I_CTL_REG, reg | SUN4I_CTL_XCH); - tx_time = max(tfr->len * 8 * 2 / (tfr->speed_hz / 1000), 100U); - start = jiffies; - timeout = wait_for_completion_timeout(&sspi->done, - msecs_to_jiffies(tx_time)); - end = jiffies; - if (!timeout) { - dev_warn(&master->dev, - "%s: timeout transferring %u bytes@%iHz for %i(%i)ms", - dev_name(&spi->dev), tfr->len, tfr->speed_hz, - jiffies_to_msecs(end - start), tx_time); - ret = -ETIMEDOUT; - goto out; - } - + ret = sun4i_spi_wait_for_transfer(spi, tfr); -out: sun4i_spi_write(sspi, SUN4I_INT_CTL_REG, 0); return ret; @@ -351,14 +357,18 @@ out: static irqreturn_t sun4i_spi_handler(int irq, void *dev_id) { - struct sun4i_spi *sspi = dev_id; - u32 status = sun4i_spi_read(sspi, SUN4I_INT_STA_REG); + struct spi_master *master = dev_id; + struct sun4i_spi *sspi = spi_master_get_devdata(master); + u32 status; + + status = sun4i_spi_read(sspi, SUN4I_INT_STA_REG); /* Transfer complete */ if (status & SUN4I_INT_CTL_TC) { - sun4i_spi_write(sspi, SUN4I_INT_STA_REG, SUN4I_INT_CTL_TC); + sun4i_spi_write(sspi, SUN4I_INT_STA_REG, + SUN4I_INT_CTL_TC); sun4i_spi_drain_fifo(sspi, SUN4I_FIFO_DEPTH); - complete(&sspi->done); + spi_finalize_current_transfer(master); return IRQ_HANDLED; } @@ -447,7 +457,7 @@ static int sun4i_spi_probe(struct platform_device *pdev) } ret = devm_request_irq(&pdev->dev, irq, sun4i_spi_handler, - 0, dev_name(&pdev->dev), sspi); + 0, dev_name(&pdev->dev), master); if (ret) { dev_err(&pdev->dev, "Cannot request IRQ\n"); goto err_free_master; @@ -467,8 +477,6 @@ static int sun4i_spi_probe(struct platform_device *pdev) goto err_free_master; } - init_completion(&sspi->done); - /* * This wake-up/shutdown pattern is to be able to have the * device woken up, even if runtime_pm is disabled