spi: sun4i: Support fifo_depth via drvdata

Support fifo_depth via drvdata instead of macro definition, this would
eventually reduce another macro definition for new SPI controller fifo
depth support addition.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>

diff --git a/drivers/spi/sun4i_spi.c b/drivers/spi/sun4i_spi.c
index be026e6..82e69a6 100644 (file)
--- a/drivers/spi/sun4i_spi.c
+++ b/drivers/spi/sun4i_spi.c
@@ -33,8 +33,6 @@
 
 #include <linux/iopoll.h>
 
-#define SUN4I_FIFO_DEPTH       64
-
 #define SUN4I_RXDATA_REG       0x00
 
 #define SUN4I_TXDATA_REG       0x04
@@ -131,6 +129,7 @@ enum sun4i_spi_bits {
 struct sun4i_spi_variant {
        const unsigned long *regs;
        const u32 *bits;
+       u32 fifo_depth;
 };
 
 struct sun4i_spi_platdata {
@@ -359,7 +358,7 @@ static int sun4i_spi_xfer(struct udevice *dev, unsigned int bitlen,
 
        while (len) {
                /* Setup the transfer now... */
-               nbytes = min(len, (u32)(SUN4I_FIFO_DEPTH - 1));
+               nbytes = min(len, (priv->variant->fifo_depth - 1));
 
                /* Setup the counters */
                writel(SUN4I_BURST_CNT(nbytes), SPI_REG(priv, SPI_BC));
@@ -503,6 +502,7 @@ static const u32 sun4i_spi_bits[] = {
 static const struct sun4i_spi_variant sun4i_a10_spi_variant = {
        .regs                   = sun4i_spi_regs,
        .bits                   = sun4i_spi_bits,
+       .fifo_depth             = 64,
 };
 
 static const struct udevice_id sun4i_spi_ids[] = {