Linux 4.9.162

[thirdparty/kernel/stable-queue.git] / releases / 4.9.162 / serial-fsl_lpuart-fix-maximum-acceptable-baud-rate-w.patch

From 883c417ee8888df416089f1136ea330bb9d15a41 Mon Sep 17 00:00:00 2001
From: Tomonori Sakita <tomonori.sakita@sord.co.jp>
Date: Mon, 21 Jan 2019 17:34:16 +0900
Subject: 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>
---
 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 5c471c3481bdf..800996522fdc2 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -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);
 
-- 
2.19.1