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

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[ 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>
This commit is contained in:
Tomonori Sakita 2019-01-21 17:34:16 +09:00 committed by Greg Kroah-Hartman
parent 1ed436cd16
commit 89d9a53346
1 changed files with 1 additions and 1 deletions
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drivers/tty/serial/fsl_lpuart.c
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@ -1695,7 +1695,7 @@ 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);