Commit 2b7d22eb authored Jan 21, 2019 by Tomonori Sakita Committed by Greg Kroah-Hartman Mar 05, 2019

serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling



[ Upstream commit 815d835b7ba46685c316b000013367dacb2b461b ]

Using over-sampling ratio, lpuart can accept baud rate upto uartclk / 4.

Signed-off-by: Tomonori Sakita <tomonori.sakita@sord.co.jp>
Signed-off-by: Atsushi Nemoto <atsushi.nemoto@sord.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent b4df4582

drivers/tty/serial/fsl_lpuart.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1494,7 +1494,7 @@ lpuart32_set_termios(struct uart_port port, struct ktermios termios,
		}

		/* ask the core to calculate the divisor */
		baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 16);
		baud = uart_get_baud_rate(port, termios, old, 50, port->uartclk / 4);

		spin_lock_irqsave(&sport->port.lock, flags);