The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-4.19.y git checkout FETCH_HEAD git cherry-pick -x 32e293be736b853f168cd065d9cbc1b0c69f545d # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable@xxxxxxxxxxxxxxx>' --in-reply-to '1679303539169236@xxxxxxxxx' --subject-prefix 'PATCH 4.19.y' HEAD^.. Possible dependencies: 32e293be736b ("serial: 8250_em: Fix UART port type") 2a1dbd259e63 ("serial: 8250_em: Switch to use platform_get_irq()") thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >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: [PATCH] serial: 8250_em: Fix UART port type 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> diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c index f8e99995eee9..d94c3811a8f7 100644 --- 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 platform_device *pdev) 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;
