[PATCH v3 1/3] spi: atmel: simplify MR register update in cs_activate()

[Manikandan Muralidharan <manikandan.m@microchip.com>]

simplified the MR register configuration by updating only the PCS field
using SPI_BFINS() instead of rewriting the entire register.
Avoids code duplication.

Signed-off-by: Manikandan Muralidharan <manikandan.m@microchip.com>
---
 drivers/spi/spi-atmel.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 89a6b46cd319..409f544d8983 100644
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -397,20 +397,10 @@ static void cs_activate(struct atmel_spi *as, struct spi_device *spi)
 		 * on CS1,2,3 needs SPI_CSR0.BITS config as SPI_CSR1,2,3.BITS
 		 */
 		spi_writel(as, CSR0, asd->csr);
-		if (as->caps.has_wdrbt) {
-			spi_writel(as, MR,
-					SPI_BF(PCS, ~(0x01 << chip_select))
-					| SPI_BIT(WDRBT)
-					| SPI_BIT(MODFDIS)
-					| SPI_BIT(MSTR));
-		} else {
-			spi_writel(as, MR,
-					SPI_BF(PCS, ~(0x01 << chip_select))
-					| SPI_BIT(MODFDIS)
-					| SPI_BIT(MSTR));
-		}
 
 		mr = spi_readl(as, MR);
+		mr = SPI_BFINS(PCS, ~(0x01 << chip_select), mr);
+		spi_writel(as, MR, mr);
 
 		/*
 		 * Ensures the clock polarity is valid before we actually
-- 
2.25.1