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Date: Thu, 17 Jan 2008 15:51:21 +0800
From: Zhang Rui <rui.zhang@...el.com>
To: lenb@...nel.org
Cc: linux-acpi@...r.kernel.org, linux-pm@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, rui.zhang@...el.com,
sujith.thomas@...el.com
Subject: [PATCH 7/10] ACPI: attach thermal zone info
From: Zhang Rui <rui.zhang@...el.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@...el.com>
Signed-off-by: Thomas Sujith <sujith.thomas@...el.com>
---
drivers/acpi/bus.c | 25 +++++++++++++++++++++++++
drivers/acpi/thermal.c | 11 +++++++++++
include/acpi/acpi_bus.h | 2 ++
3 files changed, 38 insertions(+)
Index: linux-2.6/drivers/acpi/bus.c
===================================================================
--- linux-2.6.orig/drivers/acpi/bus.c
+++ linux-2.6/drivers/acpi/bus.c
@@ -122,6 +122,31 @@ int acpi_bus_get_status(struct acpi_devi
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
-------------------------------------------------------------------------- */
Index: linux-2.6/drivers/acpi/thermal.c
===================================================================
--- linux-2.6.orig/drivers/acpi/thermal.c
+++ linux-2.6/drivers/acpi/thermal.c
@@ -1101,6 +1101,7 @@ static int acpi_thermal_register_thermal
{
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
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_ther
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);
}
Index: linux-2.6/include/acpi/acpi_bus.h
===================================================================
--- linux-2.6.orig/include/acpi/acpi_bus.h
+++ linux-2.6/include/acpi/acpi_bus.h
@@ -320,6 +320,8 @@ struct acpi_bus_event {
extern struct kset acpi_subsys;
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
*/
--
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