github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-28 01:55:51 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

platform/x86: thinkpad_acpi: Add sysfs control for TrackPoint double-tap

Browse Source 
Add a sysfs attribute to enable or disable TrackPoint double-tap hotkey
events at the kernel level.

The TrackPoint firmware enables double-tap support automatically. This
interface allows userspace to control whether double-tap events are
forwarded to userspace.

The attribute is available at:

  /sys/devices/platform/thinkpad_acpi/doubletap_enable

  0 - Disable double-tap hotkey events
  1 - Enable double-tap hotkey events (default)

Filtering is implemented by suppressing ACPI hotkey delivery without
injecting synthetic input events.

Signed-off-by: Vishnu Sankar <vishnuocv@gmail.com>
Suggested-by: Mark Pearson <mpearson-lenovo@squebb.ca>
Link: https://patch.msgid.link/20260311143144.482145-3-vishnuocv@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Vishnu Sankar 2026-03-11 23:31:43 +09:00 committed by Ilpo Järvinen
parent 9a98ebe630
commit 6227cc32fa
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
1 changed files with 35 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
drivers/platform/x86/lenovo/thinkpad_acpi.c
View File

@ -374,7 +374,7 @@ static struct {
u32 hotkey_poll_active:1;
u32 has_adaptive_kbd:1;
u32 kbd_lang:1;
u32 trackpoint_doubletap:1;
u32 trackpoint_doubletap_enable:1;
struct quirk_entry *quirks;
} tp_features;
@ -3019,6 +3019,31 @@ static const struct attribute_group adaptive_kbd_attr_group = {
.attrs = adaptive_kbd_attributes,
};
/* sysfs doubletap enable --------------------------------------------- */
static ssize_t doubletap_enable_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "%d\n", tp_features.trackpoint_doubletap_enable);
}
static ssize_t doubletap_enable_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
bool enable;
int err;
err = kstrtobool(buf, &enable);
if (err)
return err;
tp_features.trackpoint_doubletap_enable = enable;
return count;
}
static DEVICE_ATTR_RW(doubletap_enable);
/* --------------------------------------------------------------------- */
static struct attribute *hotkey_attributes[] = {
@ -3033,6 +3058,7 @@ static struct attribute *hotkey_attributes[] = {
&dev_attr_hotkey_recommended_mask.attr,
&dev_attr_hotkey_tablet_mode.attr,
&dev_attr_hotkey_radio_sw.attr,
&dev_attr_doubletap_enable.attr,
#ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
&dev_attr_hotkey_source_mask.attr,
&dev_attr_hotkey_poll_freq.attr,
@ -3558,8 +3584,8 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
hotkey_poll_setup_safe(true);
/* Enable doubletap by default */
tp_features.trackpoint_doubletap = 1;
/* Enable TrackPoint doubletap event reporting by default. */
tp_features.trackpoint_doubletap_enable = 1;
return 0;
}
@ -3864,9 +3890,9 @@ static bool hotkey_notify_8xxx(const u32 hkey, bool *send_acpi_ev)
{
switch (hkey) {
case TP_HKEY_EV_TRACK_DOUBLETAP:
if (tp_features.trackpoint_doubletap)
tpacpi_input_send_key(hkey, send_acpi_ev);
/* Only send event if doubletap is enabled */
if (!tp_features.trackpoint_doubletap_enable)
*send_acpi_ev = false;
return true;
default:
return false;
@ -11486,7 +11512,9 @@ static bool tpacpi_driver_event(const unsigned int hkey_event)
mutex_unlock(&tpacpi_inputdev_send_mutex);
return true;
case TP_HKEY_EV_DOUBLETAP_TOGGLE:
tp_features.trackpoint_doubletap = !tp_features.trackpoint_doubletap;
/* Toggle kernel-level doubletap event filtering */
tp_features.trackpoint_doubletap_enable =
!tp_features.trackpoint_doubletap_enable;
return true;
case TP_HKEY_EV_PROFILE_TOGGLE:
case TP_HKEY_EV_PROFILE_TOGGLE2: