diff mbox series

[v5,10/11] serial: 8250: dw: Improve RZN1 support

Message ID 20220413075141.72777-11-miquel.raynal@bootlin.com (mailing list archive)
State Superseded
Delegated to: Geert Uytterhoeven
Headers show
Series serial: 8250: dw: RZN1 DMA support | expand

Commit Message

Miquel Raynal April 13, 2022, 7:51 a.m. UTC 
From: Phil Edworthy <phil.edworthy@renesas.com>

Renesas RZ/N1 SoC features a slightly modified DW UART.

On this SoC, the CPR register value is known but not synthetized in
hardware. We hence need to provide a CPR value in the platform
data. This version of the controller also relies on acting as flow
controller when using DMA, so we need to provide the
"is dma flow controller" quirk.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Co-developed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/tty/serial/8250/8250_dw.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index f8e762e3ef0f..a4f46456677c 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -761,6 +761,8 @@  static const struct dw8250_platform_data dw8250_armada_38x_data = {
 
 static const struct dw8250_platform_data dw8250_renesas_rzn1_data = {
 	.usr_reg = DW_UART_USR,
+	.quirks = DW_UART_QUIRK_IS_DMA_FC,
+	.cpr = 0x00012f32,
 };
 
 static const struct dw8250_platform_data dw8250_starfive_jh7100_data = {