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legacy PC parports support parport->dev 

Give legacy parallel ports a platform device in the device tree.

This is a quick and dirty implementation; it doesn't actually convert the
legacy parport code to the device driver model (by splitting out probing from
device creation).  But at least parallel port device drivers will finally have
a device to work with.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jean Delvare 2007-05-08 00:27:40 -07:00 committed by Linus Torvalds
parent c15a3837d2
commit a7d801afc3
1 changed files with 39 additions and 0 deletions
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39
drivers/parport/parport_pc.c
View File

@ -53,6 +53,7 @@
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/pnp.h>
#include <linux/platform_device.h>
#include <linux/sysctl.h>
#include <asm/io.h>
@ -2156,6 +2157,17 @@ struct parport *parport_pc_probe_port (unsigned long int base,
struct resource *base_res;
struct resource *ECR_res = NULL;
struct resource *EPP_res = NULL;
struct platform_device *pdev = NULL;
if (!dev) {
/* We need a physical device to attach to, but none was
* provided. Create our own. */
pdev = platform_device_register_simple("parport_pc",
base, NULL, 0);
if (IS_ERR(pdev))
return NULL;
dev = &pdev->dev;
}
ops = kmalloc(sizeof (struct parport_operations), GFP_KERNEL);
if (!ops)
@ -2359,6 +2371,8 @@ out3:
out2:
kfree (ops);
out1:
if (pdev)
platform_device_unregister(pdev);
return NULL;
}
@ -3106,6 +3120,21 @@ static struct pnp_driver parport_pc_pnp_driver = {
};
static int __devinit parport_pc_platform_probe(struct platform_device *pdev)
{
/* Always succeed, the actual probing is done in
* parport_pc_probe_port(). */
return 0;
}
static struct platform_driver parport_pc_platform_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "parport_pc",
},
.probe = parport_pc_platform_probe,
};
/* This is called by parport_pc_find_nonpci_ports (in asm/parport.h) */
static int __devinit __attribute__((unused))
parport_pc_find_isa_ports (int autoirq, int autodma)
@ -3381,9 +3410,15 @@ __setup("parport_init_mode=",parport_init_mode_setup);
static int __init parport_pc_init(void)
{
int err;
if (parse_parport_params())
return -EINVAL;
err = platform_driver_register(&parport_pc_platform_driver);
if (err)
return err;
if (io[0]) {
int i;
/* Only probe the ports we were given. */
@ -3408,6 +3443,7 @@ static void __exit parport_pc_exit(void)
pci_unregister_driver (&parport_pc_pci_driver);
if (pnp_registered_parport)
pnp_unregister_driver (&parport_pc_pnp_driver);
platform_driver_unregister(&parport_pc_platform_driver);
spin_lock(&ports_lock);
while (!list_empty(&ports_list)) {
@ -3416,6 +3452,9 @@ static void __exit parport_pc_exit(void)
priv = list_entry(ports_list.next,
struct parport_pc_private, list);
port = priv->port;
if (port->dev && port->dev->bus == &platform_bus_type)
platform_device_unregister(
to_platform_device(port->dev));
spin_unlock(&ports_lock);
parport_pc_unregister_port(port);
spin_lock(&ports_lock);