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tty: serial: altera_jtaguart: Support getting mapbase and IRQ from resources 

This will make it easier to get the driver to support device tree. The
old platform data method is still supported though.

Also change the driver to use only one platform device per port.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Tobias Klauser 2011-02-18 16:38:39 +01:00 committed by Greg Kroah-Hartman
parent 3231f07507
commit 72af4762ee
1 changed files with 42 additions and 19 deletions
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61
drivers/tty/serial/altera_jtaguart.c
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@ -409,22 +409,45 @@ static int __devinit altera_jtaguart_probe(struct platform_device *pdev)
{
struct altera_jtaguart_platform_uart *platp = pdev->dev.platform_data;
struct uart_port *port;
int i;
struct resource *res_irq, *res_mem;
int i = pdev->id;
for (i = 0; i < ALTERA_JTAGUART_MAXPORTS && platp[i].mapbase; i++) {
port = &altera_jtaguart_ports[i].port;
/* -1 emphasizes that the platform must have one port, no .N suffix */
if (i == -1)
i = 0;
port->line = i;
port->type = PORT_ALTERA_JTAGUART;
port->mapbase = platp[i].mapbase;
port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE);
port->iotype = SERIAL_IO_MEM;
port->irq = platp[i].irq;
port->ops = &altera_jtaguart_ops;
port->flags = ASYNC_BOOT_AUTOCONF;
if (i >= ALTERA_JTAGUART_MAXPORTS)
return -EINVAL;
uart_add_one_port(&altera_jtaguart_driver, port);
}
port = &altera_jtaguart_ports[i].port;
res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res_mem)
port->mapbase = res_mem->start;
else if (platp)
port->mapbase = platp->mapbase;
else
return -ENODEV;
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res_irq)
port->irq = res_irq->start;
else if (platp)
port->irq = platp->irq;
else
return -ENODEV;
port->membase = ioremap(port->mapbase, ALTERA_JTAGUART_SIZE);
if (!port->membase)
return -ENOMEM;
port->line = i;
port->type = PORT_ALTERA_JTAGUART;
port->iotype = SERIAL_IO_MEM;
port->ops = &altera_jtaguart_ops;
port->flags = ASYNC_BOOT_AUTOCONF;
uart_add_one_port(&altera_jtaguart_driver, port);
return 0;
}
@ -432,13 +455,13 @@ static int __devinit altera_jtaguart_probe(struct platform_device *pdev)
static int __devexit altera_jtaguart_remove(struct platform_device *pdev)
{
struct uart_port *port;
int i;
int i = pdev->id;
for (i = 0; i < ALTERA_JTAGUART_MAXPORTS; i++) {
port = &altera_jtaguart_ports[i].port;
if (port)
uart_remove_one_port(&altera_jtaguart_driver, port);
}
if (i == -1)
i = 0;
port = &altera_jtaguart_ports[i].port;
uart_remove_one_port(&altera_jtaguart_driver, port);
return 0;
}