[ARM] 4998/1: <IMX UART>: do not use hardcoded io space size
Do not use hardcoded io space size. Instead use the information provided
by the resource.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/serial/imx.c b/drivers/serial/imx.c
index dd1e071..0ce2b4a 100644
--- a/drivers/serial/imx.c
+++ b/drivers/serial/imx.c
@@ -167,11 +167,6 @@
#define MINOR_START 41
/*
- * This is the size of our serial port register set.
- */
-#define UART_PORT_SIZE 0x100
-
-/*
* This determines how often we check the modem status signals
* for any change. They generally aren't connected to an IRQ
* so we have to poll them. We also check immediately before
@@ -721,9 +716,11 @@
*/
static void imx_release_port(struct uart_port *port)
{
- struct imx_port *sport = (struct imx_port *)port;
+ struct platform_device *pdev = to_platform_device(port->dev);
+ struct resource *mmres;
- release_mem_region(sport->port.mapbase, UART_PORT_SIZE);
+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(mmres->start, mmres->end - mmres->start + 1);
}
/*
@@ -731,10 +728,18 @@
*/
static int imx_request_port(struct uart_port *port)
{
- struct imx_port *sport = (struct imx_port *)port;
+ struct platform_device *pdev = to_platform_device(port->dev);
+ struct resource *mmres;
+ void *ret;
- return request_mem_region(sport->port.mapbase, UART_PORT_SIZE,
- "imx-uart") != NULL ? 0 : -EBUSY;
+ mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mmres)
+ return -ENODEV;
+
+ ret = request_mem_region(mmres->start, mmres->end - mmres->start + 1,
+ "imx-uart");
+
+ return ret ? 0 : -EBUSY;
}
/*