linux-kernel - [PATCH 39/41] drivers: tty: serial: pmac

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Date:   Sat, 27 Apr 2019 14:52:20 +0200
From:   "Enrico Weigelt, metux IT consult" <info@...ux.net>
To:     linux-kernel@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, andrew@...id.au,
        andriy.shevchenko@...ux.intel.com, macro@...ux-mips.org,
        vz@...ia.com, slemieux.tyco@...il.com, khilman@...libre.com,
        liviu.dudau@....com, sudeep.holla@....com,
        lorenzo.pieralisi@....com, davem@...emloft.net, jacmet@...site.dk,
        linux@...sktech.co.nz, matthias.bgg@...il.com,
        linux-mips@...r.kernel.org, linux-serial@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linuxppc-dev@...ts.ozlabs.org, sparclinux@...r.kernel.org
Subject: [PATCH 39/41] drivers: tty: serial: pmac_zilog: fill mapsize and use it

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@...ux.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