lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

thinkpad-acpi: issue backlight class events

Browse Source 
Take advantage of the new events capabilities of the backlight class to
notify userspace of backlight changes.

This depends on "backlight: Allow drivers to update the core, and
generate events on changes", by Matthew Garrett.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Richard Purdie <rpurdie@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Henrique de Moraes Holschuh
2009-12-09 01:36:24 +00:00
committed by Len Brown
parent 90765c6aee
commit 347a26860e
2 changed files with 35 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
drivers/platform/x86/thinkpad_acpi.c
View File

@@ -22,7 +22,7 @@
*/
#define TPACPI_VERSION "0.23"
#define TPACPI_SYSFS_VERSION 0x020500
#define TPACPI_SYSFS_VERSION 0x020600
/*
* Changelog:
@@ -6073,6 +6073,12 @@ static int brightness_get(struct backlight_device *bd)
return status & TP_EC_BACKLIGHT_LVLMSK;
}
static void tpacpi_brightness_notify_change(void)
{
backlight_force_update(ibm_backlight_device,
BACKLIGHT_UPDATE_HOTKEY);
}
static struct backlight_ops ibm_backlight_data = {
.get_brightness = brightness_get,
.update_status = brightness_update_status,
@@ -6227,6 +6233,12 @@ static int __init brightness_init(struct ibm_init_struct *iibm)
ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
backlight_update_status(ibm_backlight_device);
vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT,
"brightness: registering brightness hotkeys "
"as change notification\n");
tpacpi_hotkey_driver_mask_set(hotkey_driver_mask
| TP_ACPI_HKEY_BRGHTUP_MASK
| TP_ACPI_HKEY_BRGHTDWN_MASK);;
return 0;
}
@@ -6303,6 +6315,9 @@ static int brightness_write(char *buf)
* Doing it this way makes the syscall restartable in case of EINTR
*/
rc = brightness_set(level);
if (!rc && ibm_backlight_device)
backlight_force_update(ibm_backlight_device,
BACKLIGHT_UPDATE_SYSFS);
return (rc == -EINTR)? -ERESTARTSYS : rc;
}
@@ -7702,6 +7717,13 @@ static struct ibm_struct fan_driver_data = {
*/
static void tpacpi_driver_event(const unsigned int hkey_event)
{
if (ibm_backlight_device) {
switch (hkey_event) {
case TP_HKEY_EV_BRGHT_UP:
case TP_HKEY_EV_BRGHT_DOWN:
tpacpi_brightness_notify_change();
}
}
}