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>
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index c3240a6..02c0d52 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -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 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 @@
out2:
kfree (ops);
out1:
+ if (pdev)
+ platform_device_unregister(pdev);
return NULL;
}
@@ -3106,6 +3120,21 @@
};
+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 @@
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 @@
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 @@
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);