aboutsummaryrefslogtreecommitdiff
path: root/drivers/pnp/pnpacpi/core.c
diff options
context:
space:
mode:
authorDavid Brownell <david-b@pacbell.net>2007-05-08 00:28:35 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:08 -0700
commit55955aad7c09e4d93029d0cf2d360b41891f2fe4 (patch)
tree7d7bbb9d1e06c833fcc8d110db1f278b026aae80 /drivers/pnp/pnpacpi/core.c
parent98701d1b0fe98b477b53df89114e6862547f8107 (diff)
downloadlinux-linaro-stable-55955aad7c09e4d93029d0cf2d360b41891f2fe4.tar.gz
PNPACPI sets pnpdev->dev.archdata
Teach PNPACPI how to hook up its devices to their ACPI nodes, so that pnpdev->dev.archdata points to the parallel acpi device node. Previously this only worked for PCI, leaving a notable hole. Export "acpi_bus_type" so this can work. Remove some extraneous whitespace. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Adam Belay <ambx1@neo.rr.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/pnp/pnpacpi/core.c')
-rw-r--r--drivers/pnp/pnpacpi/core.c54
1 files changed, 46 insertions, 8 deletions
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index 62eda5d59024..7eb8275185b6 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -3,7 +3,7 @@
*
* Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
* Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
- *
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
@@ -18,7 +18,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
-
+
#include <linux/acpi.h>
#include <linux/pnp.h>
#include <acpi/acpi_bus.h>
@@ -82,7 +82,7 @@ static void __init pnpidacpi_to_pnpid(char *id, char *str)
static int pnpacpi_get_resources(struct pnp_dev * dev, struct pnp_resource_table * res)
{
acpi_status status;
- status = pnpacpi_parse_allocated_resource((acpi_handle)dev->data,
+ status = pnpacpi_parse_allocated_resource((acpi_handle)dev->data,
&dev->res);
return ACPI_FAILURE(status) ? -ENODEV : 0;
}
@@ -112,9 +112,9 @@ static int pnpacpi_set_resources(struct pnp_dev * dev, struct pnp_resource_table
static int pnpacpi_disable_resources(struct pnp_dev *dev)
{
acpi_status status;
-
+
/* acpi_unregister_gsi(pnp_irq(dev, 0)); */
- status = acpi_evaluate_object((acpi_handle)dev->data,
+ status = acpi_evaluate_object((acpi_handle)dev->data,
"_DIS", NULL, NULL);
return ACPI_FAILURE(status) ? -ENODEV : 0;
}
@@ -167,7 +167,7 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
dev->number = num;
-
+
/* set the initial values for the PnP device */
dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
if (!dev_id)
@@ -185,14 +185,14 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
}
if(dev->capabilities & PNP_CONFIGURABLE) {
- status = pnpacpi_parse_resource_option_data(device->handle,
+ status = pnpacpi_parse_resource_option_data(device->handle,
dev);
if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
pnp_err("PnPACPI: METHOD_NAME__PRS failure for %s", dev_id->id);
goto err1;
}
}
-
+
/* parse compatible ids */
if (device->flags.compatible_ids) {
struct acpi_compatible_id_list *cid_list = device->pnp.cid_list;
@@ -236,6 +236,42 @@ static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
return AE_OK;
}
+static int __init acpi_pnp_match(struct device *dev, void *_pnp)
+{
+ struct acpi_device *acpi = to_acpi_device(dev);
+ struct pnp_dev *pnp = _pnp;
+
+ /* true means it matched */
+ return acpi->flags.hardware_id
+ && !acpi_get_physical_device(acpi->handle)
+ && compare_pnp_id(pnp->id, acpi->pnp.hardware_id);
+}
+
+static int __init acpi_pnp_find_device(struct device *dev, acpi_handle *handle)
+{
+ struct device *adev;
+ struct acpi_device *acpi;
+
+ adev = bus_find_device(&acpi_bus_type, NULL,
+ to_pnp_dev(dev),
+ acpi_pnp_match);
+ if (!adev)
+ return -ENODEV;
+
+ acpi = to_acpi_device(adev);
+ *handle = acpi->handle;
+ put_device(adev);
+ return 0;
+}
+
+/* complete initialization of a PNPACPI device includes having
+ * pnpdev->dev.archdata.acpi_handle point to its ACPI sibling.
+ */
+static struct acpi_bus_type __initdata acpi_pnp_bus = {
+ .bus = &pnp_bus_type,
+ .find_device = acpi_pnp_find_device,
+};
+
int pnpacpi_disabled __initdata;
static int __init pnpacpi_init(void)
{
@@ -245,8 +281,10 @@ static int __init pnpacpi_init(void)
}
pnp_info("PnP ACPI init");
pnp_register_protocol(&pnpacpi_protocol);
+ register_acpi_bus_type(&acpi_pnp_bus);
acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
pnp_info("PnP ACPI: found %d devices", num);
+ unregister_acpi_bus_type(&acpi_pnp_bus);
return 0;
}
subsys_initcall(pnpacpi_init);