From: Phil Edworthy Date: Fri, 22 Apr 2022 18:06:15 +0000 (+0200) Subject: serial: 8250: dw: Improve RZN1 support X-Git-Tag: v5.19-rc1~47^2~82 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=070e246217230cce21b8dddad38bd59428494c48;p=linux-block.git serial: 8250: dw: Improve RZN1 support 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. Co-developed-by: Miquel Raynal Reviewed-by: Andy Shevchenko Signed-off-by: Phil Edworthy Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/r/20220422180615.9098-10-miquel.raynal@bootlin.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 90e64c8bd4bf..0cf1a99dc124 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, + .cpr_val = 0x00012f32, + .quirks = DW_UART_QUIRK_IS_DMA_FC, }; static const struct dw8250_platform_data dw8250_starfive_jh7100_data = {