spi/bitbang: Drop empty setup() functions

Now that the bitbang core does not require a setup() function we can
drop the check in the altera, nuc900 and xilinx drivers.
Signed-off-by: Mark Brown <broonie@linaro.org>

drivers/spi/spi-altera.c

@@ -103,16 +103,6 @@ static void altera_spi_chipsel(struct spi_device *spi, int value)
 	}
 }
 
-static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
-{
-	return 0;
-}
-
-static int altera_spi_setup(struct spi_device *spi)
-{
-	return 0;
-}
-
 static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
 {
 	if (hw->tx) {
@@ -231,7 +221,6 @@ static int altera_spi_probe(struct platform_device *pdev)
 	master->bus_num = pdev->id;
 	master->num_chipselect = 16;
 	master->mode_bits = SPI_CS_HIGH;
-	master->setup = altera_spi_setup;
 
 	hw = spi_master_get_devdata(master);
 	platform_set_drvdata(pdev, hw);
@@ -240,7 +229,6 @@ static int altera_spi_probe(struct platform_device *pdev)
 	hw->bitbang.master = spi_master_get(master);
 	if (!hw->bitbang.master)
 		return err;
-	hw->bitbang.setup_transfer = altera_spi_setupxfer;
 	hw->bitbang.chipselect = altera_spi_chipsel;
 	hw->bitbang.txrx_bufs = altera_spi_txrx;
 

drivers/spi/spi-nuc900.c

@@ -174,17 +174,6 @@ static void nuc900_spi_gobusy(struct nuc900_spi *hw)
 	spin_unlock_irqrestore(&hw->lock, flags);
 }
 
-static int nuc900_spi_setupxfer(struct spi_device *spi,
-				 struct spi_transfer *t)
-{
-	return 0;
-}
-
-static int nuc900_spi_setup(struct spi_device *spi)
-{
-	return 0;
-}
-
 static inline unsigned int hw_txbyte(struct nuc900_spi *hw, int count)
 {
 	return hw->tx ? hw->tx[count] : 0;
@@ -377,10 +366,8 @@ static int nuc900_spi_probe(struct platform_device *pdev)
 	master->num_chipselect     = hw->pdata->num_cs;
 	master->bus_num            = hw->pdata->bus_num;
 	hw->bitbang.master         = hw->master;
-	hw->bitbang.setup_transfer = nuc900_spi_setupxfer;
 	hw->bitbang.chipselect     = nuc900_spi_chipsel;
 	hw->bitbang.txrx_bufs      = nuc900_spi_txrx;
-	hw->bitbang.master->setup  = nuc900_spi_setup;
 
 	hw->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (hw->res == NULL) {

drivers/spi/spi-xilinx.c

@@ -233,21 +233,6 @@ static int xilinx_spi_setup_transfer(struct spi_device *spi,
 	return 0;
 }
 
-static int xilinx_spi_setup(struct spi_device *spi)
-{
-	/* always return 0, we can not check the number of bits.
-	 * There are cases when SPI setup is called before any driver is
-	 * there, in that case the SPI core defaults to 8 bits, which we
-	 * do not support in some cases. But if we return an error, the
-	 * SPI device would not be registered and no driver can get hold of it
-	 * When the driver is there, it will call SPI setup again with the
-	 * correct number of bits per transfer.
-	 * If a driver setups with the wrong bit number, it will fail when
-	 * it tries to do a transfer
-	 */
-	return 0;
-}
-
 static void xilinx_spi_fill_tx_fifo(struct xilinx_spi *xspi)
 {
 	u8 sr;
@@ -375,7 +360,6 @@ struct spi_master *xilinx_spi_init(struct device *dev, struct resource *mem,
 	xspi->bitbang.chipselect = xilinx_spi_chipselect;
 	xspi->bitbang.setup_transfer = xilinx_spi_setup_transfer;
 	xspi->bitbang.txrx_bufs = xilinx_spi_txrx_bufs;
-	xspi->bitbang.master->setup = xilinx_spi_setup;
 	init_completion(&xspi->done);
 
 	if (!request_mem_region(mem->start, resource_size(mem),