ACPI: thinkpad-acpi: update brightness sysfs interface support

Update the brightness sysfs interface (done through the backlight class) to
be in line with the rest of the thinkpad-acpi driver.

This renames the incorrect, un-obvious, and clash-prone name of "ibm" for
the backlight device to a much more fitting and descriptive
"thinkpad_screen".  This is something I wanted to do for quite a while...

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index 2fe4d61cc27f..8348fc653009 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -296,6 +296,8 @@ static int bluetooth_write(char *buf);
  * Brightness (backlight) subdriver
  */
 
+#define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
+
 static struct backlight_device *ibm_backlight_device;
 static int brightness_offset = 0x31;