On Thu, Feb 24, 2022 at 10:55:54AM +0100, Jiri Slaby wrote: > Define a generic UART_LCR_WLEN() macro with a size argument. It can be > used to encode byte size into an LCR value. Therefore we can use it to > simplify the drivers using tty_get_char_size() in the next patches. > > Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> > --- > include/uapi/linux/serial_reg.h | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h > index f51bc8f36813..c9d5ff6dd4c6 100644 > --- a/include/uapi/linux/serial_reg.h > +++ b/include/uapi/linux/serial_reg.h > @@ -111,6 +111,7 @@ > #define UART_LCR_WLEN6 0x01 /* Wordlength: 6 bits */ > #define UART_LCR_WLEN7 0x02 /* Wordlength: 7 bits */ > #define UART_LCR_WLEN8 0x03 /* Wordlength: 8 bits */ > +#define UART_LCR_WLEN(x) ((x) - 5) I'm all for this, but why does it need to be in a uapi .h file? thanks, greg k-h
