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ideapad: depends on backlight subsystem and update comment

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I've got a report of build failure on ideapad-laptop, which shows

drivers/built-in.o: In function `ideapad_acpi_notify':
ideapad-laptop.c:(.text+0x63876a): undefined reference to `backlight_force_update'
drivers/built-in.o: In function `ideapad_acpi_remove':
ideapad-laptop.c:(.devexit.text+0x64a7): undefined reference to `backlight_device_unregister'
drivers/built-in.o: In function `ideapad_acpi_add':
ideapad-laptop.c:(.devinit.text+0x45e28): undefined reference to `backlight_device_register'

To select backlight subsystem can prevent this error from happening.

Also update comment for this driver.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>
This commit is contained in:
Ike Panhc 2013-02-22 16:48:40 +08:00 committed by Matthew Garrett
parent 741bf0c7be
commit 16fd91e062
1 changed files with 3 additions and 1 deletions
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4
drivers/platform/x86/Kconfig
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@ -300,8 +300,10 @@ config IDEAPAD_LAPTOP
depends on RFKILL && INPUT
depends on SERIO_I8042
select INPUT_SPARSEKMAP
select BACKLIGHT_CLASS_DEVICE
help
This is a driver for the rfkill switches on Lenovo IdeaPad netbooks.
This is a driver for Lenovo IdeaPad netbooks contains drivers for
rfkill switch, hotkey, fan control and backlight control.
config THINKPAD_ACPI
tristate "ThinkPad ACPI Laptop Extras"