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| author | Maxime Chevallier <maxime.chevallier@smile.fr> | 2018-01-24 15:10:48 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-01-24 16:03:31 +0100 |
| commit | 34b1fcaeb21de2a64004a95a1dc52d7e9998b733 (patch) | |
| tree | d529ad542665292b1f2eb601980069ce222e8b88 /drivers/spi | |
| parent | spi: a3700: Remove endianness swapping functions when accessing FIFOs (diff) | |
| download | linux-34b1fcaeb21de2a64004a95a1dc52d7e9998b733.tar.xz linux-34b1fcaeb21de2a64004a95a1dc52d7e9998b733.zip | |
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>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-armada-3700.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/spi/spi-armada-3700.c b/drivers/spi/spi-armada-3700.c index f32b83c7209f..1f42bd04e630 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; |