spi: a3700: Remove endianness swapping for full-duplex transfers
Fixes the following sparse warnings :
line 767: warning: incorrect type in assignment (different base types)
line 767: expected unsigned int [unsigned] [assigned] [usertype] val_out
line 767: got restricted __le32 [usertype] <noident>
line 776: warning: cast to restricted __le32
This takes advantage of readl/writel to do the endianness reordering,
and removes an extra variable in the function.
Fixes: f68a7dcb91b7 ("spi: a3700: Add full-duplex support")
Signed-off-by: Maxime Chevallier <maxime.chevallier@smile.fr>
Reviewed-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/drivers/spi/spi-armada-3700.c b/drivers/spi/spi-armada-3700.c
index f32b83c..1f42bd0 100644
--- a/drivers/spi/spi-armada-3700.c
+++ b/drivers/spi/spi-armada-3700.c
@@ -739,7 +739,7 @@ static int a3700_spi_transfer_one_full_duplex(struct spi_master *master,
struct spi_transfer *xfer)
{
struct a3700_spi *a3700_spi = spi_master_get_devdata(master);
- u32 val_in, val_out;
+ u32 val;
/* Disable FIFO mode */
a3700_spi_fifo_mode_set(a3700_spi, false);
@@ -753,21 +753,20 @@ static int a3700_spi_transfer_one_full_duplex(struct spi_master *master,
a3700_spi_bytelen_set(a3700_spi, 1);
if (a3700_spi->byte_len == 1)
- val_out = *a3700_spi->tx_buf;
+ val = *a3700_spi->tx_buf;
else
- val_out = cpu_to_le32(*(u32 *)a3700_spi->tx_buf);
+ val = *(u32 *)a3700_spi->tx_buf;
- spireg_write(a3700_spi, A3700_SPI_DATA_OUT_REG, val_out);
+ spireg_write(a3700_spi, A3700_SPI_DATA_OUT_REG, val);
/* Wait for all the data to be shifted in / out */
while (!(spireg_read(a3700_spi, A3700_SPI_IF_CTRL_REG) &
A3700_SPI_XFER_DONE))
cpu_relax();
- val_in = le32_to_cpu(spireg_read(a3700_spi,
- A3700_SPI_DATA_IN_REG));
+ val = spireg_read(a3700_spi, A3700_SPI_DATA_IN_REG);
- memcpy(a3700_spi->rx_buf, &val_in, a3700_spi->byte_len);
+ memcpy(a3700_spi->rx_buf, &val, a3700_spi->byte_len);
a3700_spi->buf_len -= a3700_spi->byte_len;
a3700_spi->tx_buf += a3700_spi->byte_len;
