Unverified Commit 613e3900 authored by Gergo Koteles's avatar Gergo Koteles Committed by Ilpo Järvinen
Browse files

platform/x86: ideapad-laptop: introduce a generic notification chain 



There are several cases where a notification chain can simplify Lenovo
WMI drivers.

Add a generic notification chain into ideapad-laptop.

Signed-off-by: default avatarGergo Koteles <soyer@irl.hu>
Link: https://lore.kernel.org/r/c5a43efae8a32bd034c3d19c0a686941347575a7.1721898747.git.soyer@irl.hu


Reviewed-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: default avatarIlpo Järvinen <ilpo.jarvinen@linux.intel.com>
parent 78296429

drivers/platform/x86/ideapad-laptop.c

+37 −0
Original line number Diff line number Diff line
@@ -1592,6 +1592,39 @@ static void ideapad_sync_touchpad_state(struct ideapad_private *priv, bool send_ 
	priv->r_touchpad_val = value;

}



static int ideapad_laptop_nb_notify(struct notifier_block *nb,

				    unsigned long action, void *data)

{

	switch (action) {

	}



	return 0;

}



static struct notifier_block ideapad_laptop_notifier = {

	.notifier_call = ideapad_laptop_nb_notify,

};



static BLOCKING_NOTIFIER_HEAD(ideapad_laptop_chain_head);



int ideapad_laptop_register_notifier(struct notifier_block *nb)

{

	return blocking_notifier_chain_register(&ideapad_laptop_chain_head, nb);

}

EXPORT_SYMBOL_NS_GPL(ideapad_laptop_register_notifier, IDEAPAD_LAPTOP);



int ideapad_laptop_unregister_notifier(struct notifier_block *nb)

{

	return blocking_notifier_chain_unregister(&ideapad_laptop_chain_head, nb);

}

EXPORT_SYMBOL_NS_GPL(ideapad_laptop_unregister_notifier, IDEAPAD_LAPTOP);



void ideapad_laptop_call_notifier(unsigned long action, void *data)

{

	blocking_notifier_call_chain(&ideapad_laptop_chain_head, action, data);

}

EXPORT_SYMBOL_NS_GPL(ideapad_laptop_call_notifier, IDEAPAD_LAPTOP);



static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)

{

	struct ideapad_private *priv = data;
@@ -1974,6 +2007,8 @@ static int ideapad_acpi_add(struct platform_device *pdev) 
	if (err)

		goto shared_init_failed;



	ideapad_laptop_register_notifier(&ideapad_laptop_notifier);



	return 0;



shared_init_failed:
@@ -2006,6 +2041,8 @@ static void ideapad_acpi_remove(struct platform_device *pdev) 
	struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);

	int i;



	ideapad_laptop_unregister_notifier(&ideapad_laptop_notifier);



	ideapad_shared_exit(priv);



	acpi_remove_notify_handler(priv->adev->handle,

drivers/platform/x86/ideapad-laptop.h

+5 −0
Original line number Diff line number Diff line
@@ -12,6 +12,11 @@ 
#include <linux/acpi.h>

#include <linux/jiffies.h>

#include <linux/errno.h>

#include <linux/notifier.h>



int ideapad_laptop_register_notifier(struct notifier_block *nb);

int ideapad_laptop_unregister_notifier(struct notifier_block *nb);

void ideapad_laptop_call_notifier(unsigned long action, void *data);



enum {

	VPCCMD_R_VPC1 = 0x10,