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tty: serial: men_z135_uart.c: use mcb memory region size instead of hardcoded one 

There is no need to hardcode the MEN_Z135_MEM_SIZE. The MCB subsystem
already knowns the size which is located in the chameleon table.
MCB parse the chameleon table to get the resources of each IP and provide
the mcb_request_mem function to get those resources.

Use mcb_request_mem to get the resources. This function also takes care of
the memory region naming allocated by the driver for each of the instances.

Signed-off-by: Andreas Werner <andy@wernerandy.de>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Werner 2015-10-05 19:23:14 +02:00 committed by Greg Kroah-Hartman
parent 270c2adef3
commit 37f0679964
1 changed files with 15 additions and 8 deletions
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23
drivers/tty/serial/men_z135_uart.c
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@ -35,8 +35,6 @@
#define MEN_Z135_BAUD_REG 0x810
#define MEN_Z135_TIMEOUT 0x814
#define MEN_Z135_MEM_SIZE 0x818
#define IRQ_ID(x) ((x) & 0x1f)
#define MEN_Z135_IER_RXCIEN BIT(0) /* RX Space IRQ */
@ -124,6 +122,7 @@ MODULE_PARM_DESC(rx_timeout, "RX timeout. "
struct men_z135_port {
struct uart_port port;
struct mcb_device *mdev;
struct resource *mem;
unsigned char *rxbuf;
u32 stat_reg;
spinlock_t lock;
@ -734,22 +733,30 @@ static const char *men_z135_type(struct uart_port *port)
static void men_z135_release_port(struct uart_port *port)
{
struct men_z135_port *uart = to_men_z135(port);
iounmap(port->membase);
port->membase = NULL;
release_mem_region(port->mapbase, MEN_Z135_MEM_SIZE);
mcb_release_mem(uart->mem);
}
static int men_z135_request_port(struct uart_port *port)
{
int size = MEN_Z135_MEM_SIZE;
struct men_z135_port *uart = to_men_z135(port);
struct mcb_device *mdev = uart->mdev;
struct resource *mem;
if (!request_mem_region(port->mapbase, size, "men_z135_port"))
return -EBUSY;
mem = mcb_request_mem(uart->mdev, dev_name(&mdev->dev));
if (IS_ERR(mem))
return PTR_ERR(mem);
port->membase = ioremap(port->mapbase, MEN_Z135_MEM_SIZE);
port->mapbase = mem->start;
uart->mem = mem;
port->membase = ioremap(mem->start, resource_size(mem));
if (port->membase == NULL) {
release_mem_region(port->mapbase, MEN_Z135_MEM_SIZE);
mcb_release_mem(mem);
return -ENOMEM;
}