From 3398cc4f2b1592148a2ebabc5a2df3e303d4e77c Mon Sep 17 00:00:00 2001 From: Ilpo Järvinen Date: Fri, 25 Nov 2022 15:05:07 +0200 Subject: serial: 8250: Add IIR FIFOs enabled field properly MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Don't use magic literals & comments but define a real field instead for UART_IIR_FIFO_ENABLED and name also the values. Signed-off-by: Ilpo Järvinen Link: https://lore.kernel.org/r/20221125130509.8482-5-ilpo.jarvinen@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- include/uapi/linux/serial_reg.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h index bab3b39266cc..19aef5b0b049 100644 --- a/include/uapi/linux/serial_reg.h +++ b/include/uapi/linux/serial_reg.h @@ -44,6 +44,10 @@ #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_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 */ +#define UART_IIR_FIFO_ENABLED_16550A 0xc0 /* 16550A: FIFO enabled */ #define UART_FCR 2 /* Out: FIFO Control Register */ #define UART_FCR_ENABLE_FIFO 0x01 /* Enable the FIFO */ -- cgit v1.2.3