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

Enrico Weigelt, metux IT consult
2019-04-27T12:54:03Z

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@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