spi: spi-s3c64xx: Add missing s3c64xx_ prefix to function names

Add a s3c64xx_ prefix to remaining generic function names so it is clear
the code is part of the driver when grepping or looking at debug logs.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Andi Shyti <andi@etezian.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-s3c64xx.c

@@ -188,7 +188,7 @@ struct s3c64xx_spi_driver_data {
 	unsigned int			port_id;
 };
 
-static void flush_fifo(struct s3c64xx_spi_driver_data *sdd)
+static void s3c64xx_flush_fifo(struct s3c64xx_spi_driver_data *sdd)
 {
 	void __iomem *regs = sdd->regs;
 	unsigned long loops;
@@ -348,8 +348,8 @@ static bool s3c64xx_spi_can_dma(struct spi_master *master,
 	return xfer->len > (FIFO_LVL_MASK(sdd) >> 1) + 1;
 }
 
-static void enable_datapath(struct s3c64xx_spi_driver_data *sdd,
-			    struct spi_transfer *xfer, int dma_mode)
+static void s3c64xx_enable_datapath(struct s3c64xx_spi_driver_data *sdd,
+				    struct spi_transfer *xfer, int dma_mode)
 {
 	void __iomem *regs = sdd->regs;
 	u32 modecfg, chcfg;
@@ -439,8 +439,8 @@ static u32 s3c64xx_spi_wait_for_timeout(struct s3c64xx_spi_driver_data *sdd,
 	return RX_FIFO_LVL(status, sdd);
 }
 
-static int wait_for_dma(struct s3c64xx_spi_driver_data *sdd,
-			struct spi_transfer *xfer)
+static int s3c64xx_wait_for_dma(struct s3c64xx_spi_driver_data *sdd,
+				struct spi_transfer *xfer)
 {
 	void __iomem *regs = sdd->regs;
 	unsigned long val;
@@ -482,8 +482,8 @@ static int wait_for_dma(struct s3c64xx_spi_driver_data *sdd,
 	return 0;
 }
 
-static int wait_for_pio(struct s3c64xx_spi_driver_data *sdd,
-			struct spi_transfer *xfer)
+static int s3c64xx_wait_for_pio(struct s3c64xx_spi_driver_data *sdd,
+				struct spi_transfer *xfer)
 {
 	void __iomem *regs = sdd->regs;
 	unsigned long val;
@@ -666,7 +666,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
 	sdd->state &= ~RXBUSY;
 	sdd->state &= ~TXBUSY;
 
-	enable_datapath(sdd, xfer, use_dma);
+	s3c64xx_enable_datapath(sdd, xfer, use_dma);
 
 	/* Start the signals */
 	s3c64xx_spi_set_cs(spi, true);
@@ -674,9 +674,9 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
 	spin_unlock_irqrestore(&sdd->lock, flags);
 
 	if (use_dma)
-		status = wait_for_dma(sdd, xfer);
+		status = s3c64xx_wait_for_dma(sdd, xfer);
 	else
-		status = wait_for_pio(sdd, xfer);
+		status = s3c64xx_wait_for_pio(sdd, xfer);
 
 	if (status) {
 		dev_err(&spi->dev, "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n",
@@ -694,7 +694,7 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master,
 				dmaengine_terminate_all(sdd->rx_dma.ch);
 		}
 	} else {
-		flush_fifo(sdd);
+		s3c64xx_flush_fifo(sdd);
 	}
 
 	return status;
@@ -928,7 +928,7 @@ static void s3c64xx_spi_hwinit(struct s3c64xx_spi_driver_data *sdd)
 	val |= (S3C64XX_SPI_TRAILCNT << S3C64XX_SPI_TRAILCNT_OFF);
 	writel(val, regs + S3C64XX_SPI_MODE_CFG);
 
-	flush_fifo(sdd);
+	s3c64xx_flush_fifo(sdd);
 }
 
 #ifdef CONFIG_OF