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serial: 8250: allow specifying iomem size in addition to address

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This adds a mapsize field to struct uart_port to be used in
conjunction with mapbase. If set, it overrides whatever value
serial8250_port_size() would otherwise report.

Signed-off-by: Mans Rullgard <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Mans Rullgard 2015-03-08 14:30:04 +00:00 • committed by Greg Kroah-Hartman
commit ee97d0e3f0
2 changed files with 5 additions and 0 deletions
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4
drivers/tty/serial/8250/8250_core.c
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@ -2722,6 +2722,8 @@ serial8250_pm(struct uart_port *port, unsigned int state,
static unsigned int serial8250_port_size(struct uart_8250_port *pt)
{
if (pt->port.mapsize)
return pt->port.mapsize;
if (pt->port.iotype == UPIO_AU) {
if (pt->port.type == PORT_RT2880)
return 0x100;
@ -3553,6 +3555,7 @@ int __init early_serial_setup(struct uart_port *port)
p->iotype = port->iotype;
p->flags = port->flags;
p->mapbase = port->mapbase;
p->mapsize = port->mapsize;
p->private_data = port->private_data;
p->type = port->type;
p->line = port->line;
@ -3807,6 +3810,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
uart->port.flags = up->port.flags | UPF_BOOT_AUTOCONF;
uart->bugs = up->bugs;
uart->port.mapbase = up->port.mapbase;
uart->port.mapsize = up->port.mapsize;
uart->port.private_data = up->port.private_data;
uart->port.fifosize = up->port.fifosize;
uart->tx_loadsz = up->tx_loadsz;