[PATCH v5 1/7] serial: 8250_em: Fix UART port type

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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>
---
v4->v5:
 * Added fixes tag
 * Updated commit header and description
 * Removed UPF_BOOT_AUTOCONF from flags.
 * Reordered the patch (from patch#4 to patch#1) to make it easier
   for applying it to stable branches.
v3->v4:
 * Both {RZ/V2M, EMMA mobile} SoC is Register-compatible
   with the general-purpose 16750 UART chip. So started using
   generic compatible and removed struct serial8250_em_hw_info.
 * Removed Rb tag from Ilpo as it is new change.
v2->v3:
 * Replaced of_device_get_match_data()->device_get_match_data().
 * Replaced of_device.h->property.h
 * Dropped struct serial8250_em_hw_info *info from priv and started
   using a local variable info in probe().
 * Retained Rb tag from Ilpo as changes are trivial.
v2:
 * New patch
---
 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 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;
 
-- 
2.25.1




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