[PATCH 41/41] drivers: tty: serial: lpc32xx_hs: fill mapsize and use it

Enrico Weigelt, metux IT consult
2019-04-27T12:53:56Z

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/lpc32xx_hs.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c
index f4e27d0..d1f09aa 100644
--- a/drivers/tty/serial/lpc32xx_hs.c
+++ b/drivers/tty/serial/lpc32xx_hs.c
@@ -579,7 +579,7 @@ static void serial_lpc32xx_release_port(struct uart_port *port)
port->membase = NULL;
}

- release_mem_region(port->mapbase, SZ_4K);
+ release_mem_region(port->mapbase, port->mapsize);
}
}

@@ -590,12 +590,15 @@ static int serial_lpc32xx_request_port(struct uart_port *port)
if ((port->iotype == UPIO_MEM32) && (port->mapbase)) {
ret = 0;

- if (!request_mem_region(port->mapbase, SZ_4K, MODNAME))
+ if (!request_mem_region(port->mapbase,
+ port->mapsize, MODNAME))
ret = -EBUSY;
else if (port->flags & UPF_IOREMAP) {
- port->membase = ioremap(port->mapbase, SZ_4K);
+ port->membase = ioremap(port->mapbase,
+ port->mapsize);
if (!port->membase) {
- release_mem_region(port->mapbase, SZ_4K);
+ release_mem_region(port->mapbase,
+ port->mapsize);
ret = -ENOMEM;
}
}
@@ -684,6 +687,7 @@ static int serial_hs_lpc32xx_probe(struct platform_device *pdev)
return -ENXIO;
}
p->port.mapbase = res->start;
+ p->port.mapsize = SZ_4K;
p->port.membase = NULL;

ret = platform_get_irq(pdev, 0);
--
1.9.1