serial: 8250: dw: Fix the macro RZN1_UART_xDMACR_8_WORD_BURST

As per RZ/N1 peripheral user manual(r01uh0752ej0100-rzn1-peripheral.pdf)
rev 1.0.0 Mar,2019, the value for 8_WORD_BURST is 4(b2,b1=2’b10).

This patch fixes the macro as per the user manual.

Fixes: aa63d786cea2 ("serial: 8250: dw: Add support for DMA flow controlling devices")
Reviewed-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20220630083909.4294-1-biju.das.jz@bp.renesas.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index b1ab088..bb6aca0 100644 (file)
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -47,7 +47,7 @@
 #define RZN1_UART_xDMACR_DMA_EN                BIT(0)
 #define RZN1_UART_xDMACR_1_WORD_BURST  (0 << 1)
 #define RZN1_UART_xDMACR_4_WORD_BURST  (1 << 1)
-#define RZN1_UART_xDMACR_8_WORD_BURST  (3 << 1)
+#define RZN1_UART_xDMACR_8_WORD_BURST  (2 << 1)
 #define RZN1_UART_xDMACR_BLK_SZ(x)     ((x) << 3)
 
 /* Quirks */