From patchwork Mon Jun 7 10:57:59 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Lin X-Patchwork-Id: 12303135 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7989CC47082 for ; Mon, 7 Jun 2021 11:01:19 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 44435610A2 for ; Mon, 7 Jun 2021 11:01:19 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 44435610A2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=nSsvnus4xbXh/ZXzU5hvfYShHD6TtnWOvTSOWgxWCJE=; b=oPJRfZVhyNO2H/ RhXzJkKUmsk5EYuXp6FG3xiGqZH8pCCW4SbbRP90YT5PrM/a3XC/+81FpKn1oU3D0/9dpl1sSDbgf +0WRZDhQzvgJ6p29GIGa0CFIRZni3XNcoSmRKw4oKW4Te6pJRxSXStLCYIW4OXR2Urvg+GgTxpB6g TZ9gokUiej8KKh0To0UznZ2y98rsUjbuB00YnZYYyb0EVfwqA0XWeQ3hgfhMSn5f1DnZNwntLbkUu kj/Zr0CaMHG1G0TtUw3JF9qhNRB1T9T+eP7FslQXFEwqS3K/yui9okybPts8aHQJwE9FBGbTVDu9x K3Gv4egbZohlFBcNpPPg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1lqD0O-0038d6-0K; Mon, 07 Jun 2021 11:01:16 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1lqCxV-0037Rj-Mn; Mon, 07 Jun 2021 10:58:20 +0000 Received: from localhost (unknown [192.168.167.105]) by lucky1.263xmail.com (Postfix) with ESMTP id 74FE2D1A9E; Mon, 7 Jun 2021 18:58:13 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-ANTISPAM-LEVEL: 2 X-ABS-CHECKED: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P26721T140687081854720S1623063484717111_; Mon, 07 Jun 2021 18:58:13 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <0b13c905734baec9157f6eed86240492> X-RL-SENDER: jon.lin@rock-chips.com X-SENDER: jon.lin@rock-chips.com X-LOGIN-NAME: jon.lin@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 9 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: jon.lin@rock-chips.com, heiko@sntech.de, robh+dt@kernel.org, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v5 3/6] spi: rockchip: Set rx_fifo interrupt waterline base on transfer item Date: Mon, 7 Jun 2021 18:57:59 +0800 Message-Id: <20210607105802.23796-4-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210607105802.23796-1-jon.lin@rock-chips.com> References: <20210607105802.23796-1-jon.lin@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210607_035818_001531_82361AF5 X-CRM114-Status: GOOD ( 13.42 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org The error here is to calculate the width as 8 bits. In fact, 16 bits should be considered. Signed-off-by: Jon Lin --- Changes in v5: None Changes in v4: None Changes in v3: None drivers/spi/spi-rockchip.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-rockchip.c b/drivers/spi/spi-rockchip.c index bbeed3ae4ee1..0887b19ef3ad 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -540,8 +540,8 @@ static int rockchip_spi_config(struct rockchip_spi *rs, * interrupt exactly when the fifo is full doesn't seem to work, * so we need the strict inequality here */ - if (xfer->len < rs->fifo_len) - writel_relaxed(xfer->len - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); + if ((xfer->len / rs->n_bytes) < rs->fifo_len) + writel_relaxed(xfer->len / rs->n_bytes - 1, rs->regs + ROCKCHIP_SPI_RXFTLR); else writel_relaxed(rs->fifo_len / 2 - 1, rs->regs + ROCKCHIP_SPI_RXFTLR);