Commit f4817843 authored by Lubomir Rintel's avatar Lubomir Rintel Committed by Greg Kroah-Hartman

serial: 8250_of: assume reg-shift of 2 for mrvl,mmp-uart

There are two other drivers that bind to mrvl,mmp-uart and both of them
assume register shift of 2 bits. There are device trees that lack the
property and rely on that assumption.

If this driver wins the race to bind to those devices, it should behave
the same as the older deprecated driver.
Signed-off-by: default avatarLubomir Rintel <lkundrak@v3.sk>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fe9ed6d2
...@@ -130,6 +130,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev, ...@@ -130,6 +130,10 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
port->flags |= UPF_IOREMAP; port->flags |= UPF_IOREMAP;
} }
/* Compatibility with the deprecated pxa driver and 8250_pxa drivers. */
if (of_device_is_compatible(np, "mrvl,mmp-uart"))
port->regshift = 2;
/* Check for registers offset within the devices address range */ /* Check for registers offset within the devices address range */
if (of_property_read_u32(np, "reg-shift", &prop) == 0) if (of_property_read_u32(np, "reg-shift", &prop) == 0)
port->regshift = prop; port->regshift = prop;
......
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