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tty: serial: bcm63xx: Eliminate unnecessary request/release functions 

We don't really need to perform the ioremap "on demand" so it's simpler
just to do it from the probe function.  This also lets us eliminate the
UART_REG_SIZE constant and rely on the resource information passed in
from the DT or platform code.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Kevin Cernekee 2014-10-21 15:23:03 -07:00 committed by Greg Kroah-Hartman
parent 1ab8e4b1ac
commit e979f3b712
2 changed files with 10 additions and 22 deletions
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30
drivers/tty/serial/bcm63xx_uart.c
View File

@ -588,20 +588,7 @@ static void bcm_uart_set_termios(struct uart_port *port,
*/
static int bcm_uart_request_port(struct uart_port *port)
{
unsigned int size;
size = UART_REG_SIZE;
if (!request_mem_region(port->mapbase, size, "bcm63xx")) {
dev_err(port->dev, "Memory region busy\n");
return -EBUSY;
}
port->membase = ioremap(port->mapbase, size);
if (!port->membase) {
dev_err(port->dev, "Unable to map registers\n");
release_mem_region(port->mapbase, size);
return -EBUSY;
}
/* UARTs always present */
return 0;
}
@ -610,8 +597,7 @@ static int bcm_uart_request_port(struct uart_port *port)
*/
static void bcm_uart_release_port(struct uart_port *port)
{
release_mem_region(port->mapbase, UART_REG_SIZE);
iounmap(port->membase);
/* Nothing to release ... */
}
/*
@ -833,13 +819,20 @@ static int bcm_uart_probe(struct platform_device *pdev)
if (pdev->id < 0 || pdev->id >= BCM63XX_NR_UARTS)
return -EINVAL;
if (ports[pdev->id].membase)
port = &ports[pdev->id];
if (port->membase)
return -EBUSY;
memset(port, 0, sizeof(*port));
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res_mem)
return -ENODEV;
port->mapbase = res_mem->start;
port->membase = devm_ioremap_resource(&pdev->dev, res_mem);
if (IS_ERR(port->membase))
return PTR_ERR(port->membase);
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res_irq)
return -ENODEV;
@ -849,10 +842,7 @@ static int bcm_uart_probe(struct platform_device *pdev)
if (IS_ERR(clk))
return -ENODEV;
port = &ports[pdev->id];
memset(port, 0, sizeof(*port));
port->iotype = UPIO_MEM;
port->mapbase = res_mem->start;
port->irq = res_irq->start;
port->ops = &bcm_uart_ops;
port->flags = UPF_BOOT_AUTOCONF;

2
include/linux/serial_bcm63xx.h
View File

@ -116,6 +116,4 @@
UART_FIFO_PARERR_MASK | \
UART_FIFO_BRKDET_MASK)
#define UART_REG_SIZE 24
#endif /* _LINUX_SERIAL_BCM63XX_H */