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| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2022-11-25 15:05:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-19 15:01:20 +0100 |
| commit | 3398cc4f2b1592148a2ebabc5a2df3e303d4e77c (patch) | |
| tree | 6efe36d39a28beafdde3c9596bfe0de92f60d2f6 /include/uapi | |
| parent | 67a9aee7815d10e9227e32c3c7ea26726284eaef (diff) | |
| download | linux-stable-3398cc4f2b1592148a2ebabc5a2df3e303d4e77c.tar.gz linux-stable-3398cc4f2b1592148a2ebabc5a2df3e303d4e77c.tar.bz2 linux-stable-3398cc4f2b1592148a2ebabc5a2df3e303d4e77c.zip | |
serial: 8250: Add IIR FIFOs enabled field properly
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 <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20221125130509.8482-5-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/serial_reg.h | 4 |
1 files changed, 4 insertions, 0 deletions
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 */ |