[PATCH 059/112] ACPI: attach thermal zone info

Len Brown
2008-02-07T09:36:13Z

From: Zhang Rui <rui.zhang@intel.com>

Intel menlow driver needs to get the pointer of themal_zone_device
structure of an ACPI thermal zone.
Attach this to each ACPI thermal zone device object.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Thomas Sujith <sujith.thomas@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/bus.c | 25 +++++++++++++++++++++++++
drivers/acpi/thermal.c | 11 +++++++++++
include/acpi/acpi_bus.h | 2 ++
3 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 1b4cf98..8df325d 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -122,6 +122,31 @@ int acpi_bus_get_status(struct acpi_device *device)

EXPORT_SYMBOL(acpi_bus_get_status);

+void acpi_bus_private_data_handler(acpi_handle handle,
+ u32 function, void *context)
+{
+ return;
+}
+EXPORT_SYMBOL(acpi_bus_private_data_handler);
+
+int acpi_bus_get_private_data(acpi_handle handle, void **data)
+{
+ acpi_status status = AE_OK;
+
+ if (!*data)
+ return -EINVAL;
+
+ status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
+ if (ACPI_FAILURE(status) || !*data) {
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
+ handle));
+ return -ENODEV;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(acpi_bus_get_private_data);
+
/* --------------------------------------------------------------------------
Power Management
-------------------------------------------------------------------------- */
diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c
index d317da5..7400363 100644
--- a/drivers/acpi/thermal.c
+++ b/drivers/acpi/thermal.c
@@ -1101,6 +1101,7 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
{
int trips = 0;
int result;
+ acpi_status status;
int i;

if (tz->trips.critical.flags.valid)
@@ -1129,6 +1130,15 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz)
if (result)
return result;

+ status = acpi_attach_data(tz->device->handle,
+ acpi_bus_private_data_handler,
+ tz->thermal_zone);
+ if (ACPI_FAILURE(status)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error attaching device data\n"));
+ return -ENODEV;
+ }
+
tz->tz_enabled = 1;

printk(KERN_INFO PREFIX "%s is registered as thermal_zone%d\n",
@@ -1142,6 +1152,7 @@ static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
sysfs_remove_link(&tz->thermal_zone->device.kobj, "device");
thermal_zone_device_unregister(tz->thermal_zone);
tz->thermal_zone = NULL;
+ acpi_detach_data(tz->device->handle, acpi_bus_private_data_handler);
}

diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index fb7171b..504af20 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -321,6 +321,8 @@ struct acpi_bus_event {

extern struct kobject *acpi_kobj;
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
+void acpi_bus_private_data_handler(acpi_handle, u32, void *);
+int acpi_bus_get_private_data(acpi_handle, void **);
/*
* External Functions
*/
--
1.5.4.23.gef5b9