There are several cases where events handled in one of the dell-* drivers
need to be propagated to another dell-* driver.
This commits add 3 generic functions:
dell_smbios_register_notifier()
dell_smbios_unregister_notifier()
dell_smbios_call_notifier()
It currently only defines 1 action:
dell_smbios_kbd_backlight_brightness_changed
Which is intended to propagate kbd_backlight_brightness_changed wmi
events from dell-wmi to dell-laptop (which contains the actual kbd
backlight driver).
This is only somewhat dell smbios related, both dell-wmi and dell-laptop
use smbios functions and I do not want to put the notifier head in
either driver, as that will make the 2 drivers depend on each other.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
Changes in v2:
-This is a new patch in v2 of this patch-set
Changes in v3:
-No changes
---
drivers/platform/x86/dell-smbios.c | 20 ++++++++++++++++++++
drivers/platform/x86/dell-smbios.h | 11 +++++++++++
2 files changed, 31 insertions(+)
diff --git a/drivers/platform/x86/dell-smbios.c b/drivers/platform/x86/dell-smbios.c
index d2412ab..8b96bdf 100644
--- a/drivers/platform/x86/dell-smbios.c
+++ b/drivers/platform/x86/dell-smbios.c
@@ -105,6 +105,26 @@ struct calling_interface_token *dell_smbios_find_token(int tokenid)
}
EXPORT_SYMBOL_GPL(dell_smbios_find_token);
+static ATOMIC_NOTIFIER_HEAD(dell_smbios_chain_head);
+
+int dell_smbios_register_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&dell_smbios_chain_head, nb);
+}
+EXPORT_SYMBOL_GPL(dell_smbios_register_notifier);
+
+int dell_smbios_unregister_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_unregister(&dell_smbios_chain_head, nb);
+}
+EXPORT_SYMBOL_GPL(dell_smbios_unregister_notifier);
+
+void dell_smbios_call_notifier(unsigned long action, void *data)
+{
+ atomic_notifier_call_chain(&dell_smbios_chain_head, action, data);
+}
+EXPORT_SYMBOL_GPL(dell_smbios_call_notifier);
+
static void __init parse_da_table(const struct dmi_header *dm)
{
/* Final token is a terminator, so we don't want to copy it */
diff --git a/drivers/platform/x86/dell-smbios.h b/drivers/platform/x86/dell-smbios.h
index ec7d40a..e91f13f 100644
--- a/drivers/platform/x86/dell-smbios.h
+++ b/drivers/platform/x86/dell-smbios.h
@@ -16,6 +16,8 @@
#ifndef _DELL_SMBIOS_H_
#define _DELL_SMBIOS_H_
+struct notifier_block;
+
/* This structure will be modified by the firmware when we enter
* system management mode, hence the volatiles */
@@ -43,4 +45,13 @@ void dell_smbios_release_buffer(void);
void dell_smbios_send_request(int class, int select);
struct calling_interface_token *dell_smbios_find_token(int tokenid);
+
+enum dell_smbios_notifier_actions {
+ dell_smbios_kbd_backlight_brightness_changed,
+};
+
+int dell_smbios_register_notifier(struct notifier_block *nb);
+int dell_smbios_unregister_notifier(struct notifier_block *nb);
+void dell_smbios_call_notifier(unsigned long action, void *data);
+
#endif
--
2.9.3
------------------------------------------------------------------------------
The Command Line: Reinvented for Modern Developers
Did the resurgence of CLI tooling catch you by surprise?
Reconnect with the command line and become more productive.
Learn the new .NET and ASP.NET CLI. Get your free copy!
http://sdm.link/telerik
_______________________________________________
ibm-acpi-devel mailing list
ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
