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tty: atmel_serial: Use devm_platform_ioremap_resource()

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Simplify the request port function by using a single call
to devm_platform_ioremap_resource().

This will also enhance the printing from /proc/iomem:

cat /proc/iomem | grep flexcom ; cat /proc/iomem | grep serial

f0004000-f00041ff : f0004000.flexcom flexcom@f0004000
f8020000-f80201ff : f8020000.flexcom flexcom@f8020000
f0004200-f00043ff : f0004200.serial serial@200
f8020200-f80203ff : f8020200.serial serial@200
fffff200-fffff3ff : fffff200.serial serial@fffff200

Signed-off-by: Mihai Sain <mihai.sain@microchip.com>
Tested-by: Andrei Simion <andrei.simion@microchip.com>
Reviewed-by: Hari Prasath Gujulan Elango <hari.prasathge@microchip.com>
Link: https://lore.kernel.org/r/20241105131946.22449-1-mihai.sain@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mihai Sain 2024-11-05 15:19:46 +02:00 committed by Greg Kroah-Hartman
parent bcc7ba6688
commit 785cbc8b79
1 changed files with 3 additions and 9 deletions
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12
drivers/tty/serial/atmel_serial.c
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@ -2419,17 +2419,11 @@ static void atmel_release_port(struct uart_port *port)
static int atmel_request_port(struct uart_port *port)
{
struct platform_device *mpdev = to_platform_device(port->dev->parent);
int size = resource_size(mpdev->resource);
if (!request_mem_region(port->mapbase, size, "atmel_serial"))
return -EBUSY;
if (port->flags & UPF_IOREMAP) {
port->membase = ioremap(port->mapbase, size);
if (port->membase == NULL) {
release_mem_region(port->mapbase, size);
return -ENOMEM;
}
port->membase = devm_platform_ioremap_resource(mpdev, 0);
if (IS_ERR(port->membase))
return PTR_ERR(port->membase);
}
return 0;