From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@baylibre.com (Kevin Hilman) Date: Fri, 21 Apr 2017 15:03:45 -0700 Subject: [PATCH 1/6] serial: meson: fix setting number of stop bits In-Reply-To: (Heiner Kallweit's message of "Mon, 17 Apr 2017 17:54:26 +0200") References: <619c093d-0dcc-b771-5cf0-ae31ea723d0d@baylibre.com> Message-ID: To: linus-amlogic@lists.infradead.org List-Id: linus-amlogic.lists.infradead.org Heiner Kallweit writes: > Am 17.04.2017 um 17:24 schrieb Neil Armstrong: >> On 04/16/2017 10:06 PM, Heiner Kallweit wrote: >>> The stop bit value as to be or'ed, so far this worked only just by chance >>> because AML_UART_STOP_BIN_1SB is 0. >>> >>> Signed-off-by: Heiner Kallweit >>> --- >>> drivers/tty/serial/meson_uart.c | 2 +- >>> 1 file changed, 1 insertion(+), 1 deletion(-) >>> >>> diff --git a/drivers/tty/serial/meson_uart.c b/drivers/tty/serial/meson_uart.c >>> index 60f16795..e2e25da1 100644 >>> --- a/drivers/tty/serial/meson_uart.c >>> +++ b/drivers/tty/serial/meson_uart.c >>> @@ -355,7 +355,7 @@ static void meson_uart_set_termios(struct uart_port *port, >>> if (cflags & CSTOPB) >>> val |= AML_UART_STOP_BIN_2SB; >>> else >>> - val &= ~AML_UART_STOP_BIN_1SB; >>> + val |= AML_UART_STOP_BIN_1SB; >>> >>> if (cflags & CRTSCTS) >>> val &= ~AML_UART_TWO_WIRE_EN; >>> >> >> Hi, >> >> in fact you can totally drop the else statement since it's a no-op in both cases. >> > That's right. However I think leaving this in makes the code better understandable. > And most likely the compiler will remove this no-op anyway. Agreed. I like it for readability. Kevin