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spi: spi-fsl-dspi: Drop unneeded use of dataflags bits 

Checking directly against pointer value should be at least as fast as doing
bitmasking and compare, so let's keep it simple.

Signed-off-by: Esben Haabendal <eha@deif.com>
Acked-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Esben Haabendal 2018-06-20 09:34:32 +02:00 committed by Mark Brown
parent c87bdcc89d
commit 4779f23d1a
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 8 additions and 15 deletions
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23
drivers/spi/spi-fsl-dspi.c
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@ -38,8 +38,6 @@
#define DRIVER_NAME "fsl-dspi"
#define TRAN_STATE_RX_VOID 0x01
#define TRAN_STATE_TX_VOID 0x02
#define TRAN_STATE_WORD_ODD_NUM 0x04
#define DSPI_FIFO_SIZE 4
@ -232,7 +230,7 @@ static void dspi_rx_dma_callback(void *arg)
rx_word = is_double_byte_mode(dspi);
if (!(dspi->dataflags & TRAN_STATE_RX_VOID)) {
if (dspi->rx) {
for (i = 0; i < dma->curr_xfer_len; i++) {
d = dspi->dma->rx_dma_buf[i];
rx_word ? (*(u16 *)dspi->rx = d) :
@ -538,12 +536,13 @@ static u32 dspi_data_to_pushr(struct fsl_dspi *dspi, int tx_word)
{
u16 d16;
if (!(dspi->dataflags & TRAN_STATE_TX_VOID))
if (dspi->tx) {
d16 = tx_word ? *(u16 *)dspi->tx : *(u8 *)dspi->tx;
else
dspi->tx += tx_word + 1;
} else {
d16 = dspi->void_write_data;
}
dspi->tx += tx_word + 1;
dspi->len -= tx_word + 1;
return SPI_PUSHR_TXDATA(d16) |
@ -560,10 +559,10 @@ static void dspi_data_from_popr(struct fsl_dspi *dspi, int rx_word)
regmap_read(dspi->regmap, SPI_POPR, &val);
d = SPI_POPR_RXDATA(val);
if (!(dspi->dataflags & TRAN_STATE_RX_VOID))
if (dspi->rx) {
rx_word ? (*(u16 *)dspi->rx = d) : (*(u8 *)dspi->rx = d);
dspi->rx += rx_word + 1;
dspi->rx += rx_word + 1;
}
}
static int dspi_eoq_write(struct fsl_dspi *dspi)
@ -687,12 +686,6 @@ static int dspi_transfer_one_message(struct spi_master *master,
dspi->rx_end = dspi->rx + transfer->len;
dspi->len = transfer->len;
if (!dspi->rx)
dspi->dataflags |= TRAN_STATE_RX_VOID;
if (!dspi->tx)
dspi->dataflags |= TRAN_STATE_TX_VOID;
regmap_write(dspi->regmap, SPI_MCR, dspi->cur_chip->mcr_val);
regmap_update_bits(dspi->regmap, SPI_MCR,
SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF,