Hi, On 24-10-16 15:31, Pali Rohár wrote:
On Sunday 23 October 2016 21:46:50 Hans de Goede wrote: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 --- 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); + #endifThat is better but technically speaking those notifiers do not have nothing common with dell-smbios :-(
Well WMI events get enabled via a SMBIOS call, and dell-laptop uses SMBIOS exclusively, so it seems to fit. Basically this is a case of we have to put this somewhere and dell-smbios is the best fit IMHO. Regards, Hans -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
