[PATCH 2/5] mtd: spi: renesas: Write DRDMCR register once

[Marek Vasut]

Instead of writing DRDMCR with 0 first and then overwriting DRDMCR again
in case any dummy bytes have to be sent out, write DRDMCR in every case
with the amount of dummy bytes that have to be sent out. In case no dummy
bytes have to be sent out, the value written into DRDMCR is zero, so no
dummy bytes are sent out. No functional change.

Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
---
Cc: "Cédric Le Goater" <clg at kaod.org>
Cc: Hai Pham <hai.pham.ud at renesas.com>
Cc: Jagan Teki <jagan at amarulasolutions.com>
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Paul Barker <paul.barker.ct at bp.renesas.com>
Cc: Tom Rini <trini at konsulko.com>
Cc: William Zhang <william.zhang at broadcom.com>
Cc: u-boot at lists.denx.de
---
 drivers/spi/renesas_rpc_spi.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/renesas_rpc_spi.c b/drivers/spi/renesas_rpc_spi.c
index 749c686a6c4..a2ac5525b90 100644
--- a/drivers/spi/renesas_rpc_spi.c
+++ b/drivers/spi/renesas_rpc_spi.c
@@ -289,12 +289,10 @@ static int rpc_spi_mem_exec_op(struct spi_slave *spi,
 			smenr |= RPC_DRENR_ADE(0);
 		}
 
-		writel(0, priv->regs + RPC_DRDMCR);
-		if (op->dummy.nbytes) {
-			writel(8 * op->dummy.nbytes - 1, priv->regs + RPC_DRDMCR);
+		if (op->dummy.nbytes)
 			smenr |= RPC_DRENR_DME;
-		}
 
+		writel(8 * op->dummy.nbytes - 1, priv->regs + RPC_DRDMCR);
 		writel(0, priv->regs + RPC_DROPR);
 		writel(smenr, priv->regs + RPC_DRENR);
 
-- 
2.45.2