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PNP: add pnp_possible_config() -- can a device could be configured this way?

Browse source 
As part of a heuristic to identify modem devices, 8250_pnp.c
checks to see whether a device can be configured at any of the
legacy COM port addresses.

This patch moves the code that traverses the PNP "possible resource
options" from 8250_pnp.c to the PNP subsystem.  This encapsulation
is important because a future patch will change the implementation
of those resource options.

Signed-off-by: Bjorn Helgaas <[email protected]>
Signed-off-by: Andi Kleen <[email protected]>
Acked-by: Rene Herman <[email protected]>
Signed-off-by: Len Brown <[email protected]>
This commit is contained in:
Bjorn Helgaas 2008-06-27 16:57:01 -06:00 • committed by Andi Kleen
commit 57fd51a8be
3 changed files with 74 additions and 17 deletions
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24
drivers/serial/8250_pnp.c
View file

@ -383,21 +383,14 @@ static int __devinit check_name(char *name)
return 0;
}
static int __devinit check_resources(struct pnp_option *option)
static int __devinit check_resources(struct pnp_dev *dev)
{
struct pnp_option *tmp;
if (!option)
return 0;
resource_size_t base[] = {0x2f8, 0x3f8, 0x2e8, 0x3e8};
int i;
for (tmp = option; tmp; tmp = tmp->next) {
struct pnp_port *port;
for (port = tmp->port; port; port = port->next)
if ((port->size == 8) &&
((port->min == 0x2f8) ||
(port->min == 0x3f8) ||
(port->min == 0x2e8) ||
(port->min == 0x3e8)))
return 1;
for (i = 0; i < ARRAY_SIZE(base); i++) {
if (pnp_possible_config(dev, IORESOURCE_IO, base[i], 8))
return 1;
}
return 0;
@ -420,10 +413,7 @@ static int __devinit serial_pnp_guess_board(struct pnp_dev *dev, int *flags)
(dev->card && check_name(dev->card->name))))
return -ENODEV;
if (check_resources(dev->independent))
return 0;
if (check_resources(dev->dependent))
if (check_resources(dev))
return 0;
return -ENODEV;