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 # 4.14.y
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>
[biju: manually fixed the conflicts]
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
Resending to 4.14 with confilcts [1] fixed.
[1] https://lore.kernel.org/stable/167930354015894@xxxxxxxxx/
---
drivers/tty/serial/8250/8250_em.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c
index 0b6381214917..e0abc1fd6730 100644
--- a/drivers/tty/serial/8250/8250_em.c
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -113,8 +113,8 @@ static int serial8250_em_probe(struct platform_device *pdev)
memset(&up, 0, sizeof(up));
up.port.mapbase = regs->start;
up.port.irq = irq->start;
- 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;
--
2.25.1
