spi: zynq_spi: Add config reg shift named macros

Update the numerical values for baudrate and chipselect
with config reg shift named macro's

Signed-off-by: Jagan Teki <jteki@openedev.com>

diff --git a/drivers/spi/zynq_spi.c b/drivers/spi/zynq_spi.c
index d370e495cdff45ea36c41bdaea3593bc7644e76c..293499ce0e3b14c4ab095279fe23aa74fe036ebb 100644 (file)
--- a/drivers/spi/zynq_spi.c
+++ b/drivers/spi/zynq_spi.c
@@ -32,6 +32,10 @@ DECLARE_GLOBAL_DATA_PTR;
 #define ZYNQ_SPI_IXR_ALL_MASK          0x7F            /* All IXR bits */
 #define ZYNQ_SPI_ENR_SPI_EN_MASK       (1 << 0)        /* SPI Enable */
 
+#define ZYNQ_SPI_CR_BAUD_MAX           8       /* Baud rate divisor max val */
+#define ZYNQ_SPI_CR_BAUD_SHIFT         3       /* Baud rate divisor shift */
+#define ZYNQ_SPI_CR_SS_SHIFT           10      /* Slave select shift */
+
 #define ZYNQ_SPI_FIFO_DEPTH            128
 #ifndef CONFIG_SYS_ZYNQ_SPI_WAIT
 #define CONFIG_SYS_ZYNQ_SPI_WAIT       (CONFIG_SYS_HZ/100)     /* 10 ms */
@@ -143,7 +147,7 @@ static void spi_cs_activate(struct udevice *dev, uint cs)
         * xx01 - cs1
         * x011 - cs2
         */
-       cr |= (~(0x1 << cs) << 10) & ZYNQ_SPI_CR_CS_MASK;
+       cr |= (~(0x1 << cs) << ZYNQ_SPI_CR_SS_SHIFT) & ZYNQ_SPI_CR_CS_MASK;
        writel(cr, &regs->cr);
 }
 
@@ -260,14 +264,14 @@ static int zynq_spi_set_speed(struct udevice *bus, uint speed)
                /* Set baudrate x8, if the freq is 0 */
                baud_rate_val = 0x2;
        } else if (plat->speed_hz != speed) {
-               while ((baud_rate_val < 8) &&
+               while ((baud_rate_val < ZYNQ_SPI_CR_BAUD_MAX) &&
                                ((plat->frequency /
                                (2 << baud_rate_val)) > speed))
                        baud_rate_val++;
                plat->speed_hz = speed / (2 << baud_rate_val);
        }
        confr &= ~ZYNQ_SPI_CR_BRD_MASK;
-       confr |= (baud_rate_val << 3);
+       confr |= (baud_rate_val << ZYNQ_SPI_CR_BAUD_SHIFT);
 
        writel(confr, &regs->cr);
        priv->freq = speed;