This is a note to let you know that I've just added the patch titled
serial: 8250_em: Fix UART port type
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-8250_em-fix-uart-port-type.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 32e293be736b853f168cd065d9cbc1b0c69f545d Mon Sep 17 00:00:00 2001
From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Date: Mon, 27 Feb 2023 11:41:46 +0000
Subject: serial: 8250_em: Fix UART port type
From: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
commit 32e293be736b853f168cd065d9cbc1b0c69f545d upstream.
As per HW manual for EMEV2 "R19UH0040EJ0400 Rev.4.00", the UART
IP found on EMMA mobile SoC is Register-compatible with the
general-purpose 16750 UART chip. Fix UART port type as 16750 and
enable 64-bytes fifo support.
Fixes: 22886ee96895 ("serial8250-em: Emma Mobile UART driver V2")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230227114152.22265-2-biju.das.jz@xxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_em.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/tty/serial/8250/8250_em.c
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -106,8 +106,8 @@ static int serial8250_em_probe(struct pl
memset(&up, 0, sizeof(up));
up.port.mapbase = regs->start;
up.port.irq = irq;
- up.port.type = PORT_UNKNOWN;
- up.port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP;
+ up.port.type = PORT_16750;
+ up.port.flags = UPF_FIXED_PORT | UPF_IOREMAP | UPF_FIXED_TYPE;
up.port.dev = &pdev->dev;
up.port.private_data = priv;
Patches currently in stable-queue which might be from biju.das.jz@xxxxxxxxxxxxxx are
queue-5.10/serial-8250_em-fix-uart-port-type.patch
