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>

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 3ca9b96..3bf135b 100644 (file)
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -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,