spi: spi-fsl-dspi: Remove unused chip->void_write_data

This variable has been present since the initial submission of the
driver, and held, for some reason, the value of zero, to be sent on the
wire in the case there wasn't any TX buffer for the current transfer.

Since quite a while now, however, it isn't doing anything at all.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20200304220044.11193-3-olteanv@gmail.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 896d7a0..63ec1d6 100644 (file)
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -110,7 +110,6 @@
 
 struct chip_data {
        u32                     ctar_val;
-       u16                     void_write_data;
 };
 
 enum dspi_trans_mode {
@@ -235,7 +234,6 @@ struct fsl_dspi {
        const void                              *tx;
        void                                    *rx;
        void                                    *rx_end;
-       u16                                     void_write_data;
        u16                                     tx_cmd;
        u8                                      bits_per_word;
        u8                                      bytes_per_word;
@@ -795,8 +793,6 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
                                dspi->tx_cmd |= SPI_PUSHR_CMD_CONT;
                }
 
-               dspi->void_write_data = dspi->cur_chip->void_write_data;
-
                dspi->tx = transfer->tx_buf;
                dspi->rx = transfer->rx_buf;
                dspi->rx_end = dspi->rx + transfer->len;
@@ -897,8 +893,6 @@ static int dspi_setup(struct spi_device *spi)
                sck_cs_delay = pdata->sck_cs_delay;
        }
 
-       chip->void_write_data = 0;
-
        clkrate = clk_get_rate(dspi->clk);
        hz_to_spi_baud(&pbr, &br, spi->max_speed_hz, clkrate);