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Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.94 #2 (Red Hat Linux)) id 1lZrTl-00EGYe-DI; Fri, 23 Apr 2021 08:48:02 +0000 Received: from localhost (unknown [192.168.167.235]) by lucky1.263xmail.com (Postfix) with ESMTP id 23ECCD1AB7; Fri, 23 Apr 2021 16:47:59 +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 P2750T140649173088000S1619167674948451_; Fri, 23 Apr 2021 16:47:56 +0800 (CST) X-IP-DOMAINF: 1 X-UNIQUE-TAG: <2557a3ff5cf6116de1b31291f3f41ed3> 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: 8 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-System-Flag: 0 From: Jon Lin To: broonie@kernel.org Cc: heiko@sntech.de, linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@esmil.dk, Jon Lin Subject: [PATCH v1 6/8] spi: rockchip: Set rx_fifo interrupt waterline base on transfer item Date: Fri, 23 Apr 2021 16:47:48 +0800 Message-Id: <20210423084750.18533-1-jon.lin@rock-chips.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210423084155.17439-1-jon.lin@rock-chips.com> References: <20210423084155.17439-1-jon.lin@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210423_014801_645045_179441ED X-CRM114-Status: GOOD ( 12.47 ) 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 --- 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 cfcbfd6c1be5..c245af1692c7 100644 --- a/drivers/spi/spi-rockchip.c +++ b/drivers/spi/spi-rockchip.c @@ -547,8 +547,8 @@ 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);