From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Tomonori Sakita <tomonori.sakita@sord.co.jp>,
Atsushi Nemoto <atsushi.nemoto@sord.co.jp>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sasha Levin <sashal@kernel.org>,
linux-serial@vger.kernel.org
Subject: [PATCH AUTOSEL 4.14 24/40] serial: fsl_lpuart: fix maximum acceptable baud rate with over-sampling
Date: Thu, 14 Feb 2019 21:12:57 -0500 [thread overview]
Message-ID: <20190215021313.178476-24-sashal@kernel.org> (raw)
In-Reply-To: <20190215021313.178476-1-sashal@kernel.org>
From: Tomonori Sakita <tomonori.sakita@sord.co.jp>
[ 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>
---
drivers/tty/serial/fsl_lpuart.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index fd64ac2c1a74..2451129c515d 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -1697,7 +1697,7 @@ 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);
--
2.19.1
parent reply other threads:[~2019-02-15 2:12 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20190215021313.178476-1-sashal@kernel.org>]
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