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From 1edc302f56b57512a99d6c21e1ddb85a89d16045 Mon Sep 17 00:00:00 2001
From: Andrii Pientsov <andrii.pientsov@globallogic.com>
Date: Mon, 22 Nov 2021 12:03:15 +0200
Subject: [PATCH] [PATCH] linux-5.4-reserve-5-bit-serial-for-multidrop
---
drivers/tty/serial/atmel_serial.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index ea0215a0f4a4..28d4a92c0d63 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -2158,10 +2158,13 @@ static void atmel_set_termios(struct uart_port *port, struct ktermios *termios,
baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16);
+ mdrop = 0;
/* byte size */
switch (termios->c_cflag & CSIZE) {
case CS5:
- mode |= ATMEL_US_CHRL_5;
+ mode |= ATMEL_US_PAR_MULTI_DROP;
+ mdrop = ATMEL_US_SENDA;
+ printk(KERN_INFO "termios: Setting Atmel Multi-Drop serial");
break;
case CS6:
mode |= ATMEL_US_CHRL_6;
--
2.25.1
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