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[109.252.170.211]) by smtp.gmail.com with ESMTPSA id q18sm3379750lfr.138.2020.09.29.15.20.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2020 15:20:54 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Laxman Dewangan , Wolfram Sang , =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= , Andy Shevchenko Cc: linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v9 20/32] i2c: tegra: Remove "dma" variable from tegra_i2c_xfer_msg() Date: Wed, 30 Sep 2020 01:19:03 +0300 Message-Id: <20200929221915.10979-21-digetx@gmail.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200929221915.10979-1-digetx@gmail.com> References: <20200929221915.10979-1-digetx@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The "dma" variable of tegra_i2c_xfer_msg() function doesn't bring much in regards to readability and generation of the code. Besides readability, it's also not very nice that the is_curr_dma_xfer is initialized in tegra_i2c_xfer_msg() and then could be overridden by tegra_i2c_config_fifo_trig(). In a result, the "dma" variable creates slight confusion since it's not instantly obvious why it's set after tegra_i2c_config_fifo_trig(). Hence should be better to have the variable removed. This makes code more consistent. Reviewed-by: Andy Shevchenko Acked-by: Thierry Reding Tested-by: Thierry Reding Signed-off-by: Dmitry Osipenko --- drivers/i2c/busses/i2c-tegra.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 79fa98423cae..eb62284e2293 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -1120,7 +1120,6 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, size_t xfer_size; u32 *buffer = NULL; int err = 0; - bool dma; u16 xfer_time = 100; err = tegra_i2c_flush_fifos(i2c_dev); @@ -1143,7 +1142,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, i2c_dev->dma_buf && !i2c_dev->is_curr_atomic_xfer; tegra_i2c_config_fifo_trig(i2c_dev, xfer_size); - dma = i2c_dev->is_curr_dma_xfer; + /* * Transfer time in mSec = Total bits / transfer rate * Total bits = 9 bits per byte (including ACK bit) + Start & stop bits @@ -1153,7 +1152,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, int_mask = I2C_INT_NO_ACK | I2C_INT_ARBITRATION_LOST; tegra_i2c_unmask_irq(i2c_dev, int_mask); - if (dma) { + if (i2c_dev->is_curr_dma_xfer) { if (i2c_dev->msg_read) { dma_sync_single_for_device(i2c_dev->dev, i2c_dev->dma_phys, @@ -1181,13 +1180,13 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, PACKET_HEADER0_PROTOCOL_I2C) | FIELD_PREP(PACKET_HEADER0_CONT_ID, i2c_dev->cont_id) | FIELD_PREP(PACKET_HEADER0_PACKET_ID, 1); - if (dma && !i2c_dev->msg_read) + if (i2c_dev->is_curr_dma_xfer && !i2c_dev->msg_read) *buffer++ = packet_header; else i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); packet_header = msg->len - 1; - if (dma && !i2c_dev->msg_read) + if (i2c_dev->is_curr_dma_xfer && !i2c_dev->msg_read) *buffer++ = packet_header; else i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); @@ -1207,13 +1206,13 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, packet_header |= I2C_HEADER_CONT_ON_NAK; if (msg->flags & I2C_M_RD) packet_header |= I2C_HEADER_READ; - if (dma && !i2c_dev->msg_read) + if (i2c_dev->is_curr_dma_xfer && !i2c_dev->msg_read) *buffer++ = packet_header; else i2c_writel(i2c_dev, packet_header, I2C_TX_FIFO); if (!i2c_dev->msg_read) { - if (dma) { + if (i2c_dev->is_curr_dma_xfer) { memcpy(buffer, msg->buf, msg->len); dma_sync_single_for_device(i2c_dev->dev, i2c_dev->dma_phys, @@ -1233,7 +1232,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, if (i2c_dev->hw->has_per_pkt_xfer_complete_irq) int_mask |= I2C_INT_PACKET_XFER_COMPLETE; - if (!dma) { + if (!i2c_dev->is_curr_dma_xfer) { if (msg->flags & I2C_M_RD) int_mask |= I2C_INT_RX_FIFO_DATA_REQ; else if (i2c_dev->msg_buf_remaining) @@ -1244,7 +1243,7 @@ static int tegra_i2c_xfer_msg(struct tegra_i2c_dev *i2c_dev, dev_dbg(i2c_dev->dev, "unmasked irq: %02x\n", i2c_readl(i2c_dev, I2C_INT_MASK)); - if (dma) { + if (i2c_dev->is_curr_dma_xfer) { time_left = tegra_i2c_wait_completion_timeout( i2c_dev, &i2c_dev->dma_complete, xfer_time); -- 2.27.0