[PATCH 39/41] drivers: tty: serial: pmac_zilog: fill mapsize and use it

[Enrico Weigelt, metux IT consult]

Fill the struct uart_port->mapsize field and use it, insteaf of
hardcoded values in many places. This makes the code layout a bit
more consistent and easily allows using generic helpers for the
io memory handling.

Candidates for such helpers could be eg. the request+ioremap and
iounmap+release combinations.

Signed-off-by: Enrico Weigelt <info at metux.net>
---
 drivers/tty/serial/pmac_zilog.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index bcb5bf7..1fef014 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -88,6 +88,8 @@
 #define PMACZILOG_NAME		"ttyPZ"
 #endif
 
+#define PMZ_MAPSIZE		0x1000
+
 #define pmz_debug(fmt, arg...)	pr_debug("ttyPZ%d: " fmt, uap->port.line, ## arg)
 #define pmz_error(fmt, arg...)	pr_err("ttyPZ%d: " fmt, uap->port.line, ## arg)
 #define pmz_info(fmt, arg...)	pr_info("ttyPZ%d: " fmt, uap->port.line, ## arg)
@@ -1411,7 +1413,8 @@ static int __init pmz_init_port(struct uart_pmac_port *uap)
 	if (of_address_to_resource(np, 0, &r_ports))
 		return -ENODEV;
 	uap->port.mapbase = r_ports.start;
-	uap->port.membase = ioremap(uap->port.mapbase, 0x1000);
+	uap->port.mapsize = PMZ_MAPSIZE;
+	uap->port.membase = ioremap(uap->port.mapbase, uap->port.mapsize);
 
 	uap->control_reg = uap->port.membase;
 	uap->data_reg = uap->control_reg + 0x10;
@@ -1709,6 +1712,7 @@ static int __init pmz_init_port(struct uart_pmac_port *uap)
 		return -ENODEV;
 
 	uap->port.mapbase  = r_ports->start;
+	uap->port.mapsize  = PMZ_MAPSIZE;
 	uap->port.membase  = (unsigned char __iomem *) r_ports->start;
 	uap->port.iotype   = UPIO_MEM;
 	uap->port.irq      = irq;
-- 
1.9.1