From afd216ca17b1fd24f6b73a1490752c22ab42598c Mon Sep 17 00:00:00 2001 From: Ilpo Järvinen Date: Fri, 25 Nov 2022 15:05:08 +0200 Subject: serial: 8250: Define IIR 64 byte bit & cleanup related code 16750 indicates 64 bytes FIFO with a IIR bit. Add define for it and make related code more obvious. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-6-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- include/uapi/linux/serial_reg.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/uapi/linux') diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h index 19aef5b0b049..08b3527e1b93 100644 --- a/include/uapi/linux/serial_reg.h +++ b/include/uapi/linux/serial_reg.h @@ -44,6 +44,7 @@ #define UART_IIR_RX_TIMEOUT 0x0c /* OMAP RX Timeout interrupt */ #define UART_IIR_XOFF 0x10 /* OMAP XOFF/Special Character */ #define UART_IIR_CTS_RTS_DSR 0x20 /* OMAP CTS/RTS/DSR Change */ +#define UART_IIR_64BYTE_FIFO 0x20 /* 16750 64 bytes FIFO */ #define UART_IIR_FIFO_ENABLED 0xc0 /* FIFOs enabled / port type identification */ #define UART_IIR_FIFO_ENABLED_8250 0x00 /* 8250: no FIFO */ #define UART_IIR_FIFO_ENABLED_16550 0x80 /* 16550: (broken/unusable) FIFO */ -- cgit v1.2.3