thinkpad-acpi: make volume subdriver optional
commitb4b78b0608674c31bd0a65f46806f6e2680bc534
authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Sun, 27 Dec 2009 18:55:34 +0000 (27 16:55 -0200)
committerHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Sat, 20 Feb 2010 22:00:33 +0000 (20 20:00 -0200)
tree0848097ecbbcdeef8a80dfa8a59cc320491310db
parent8820357b06a6e4685525cf4d6aec9fb46dc37ff8
thinkpad-acpi: make volume subdriver optional

Allow the user to choose through Kconfig if the Console Audio Control
interface (aka "volume subdriver") should be available or not.

This not only saves some memory, but also allows the thinkpad-acpi
driver to be built-in even if ALSA is modular when the console audio
control interface is not wanted.

This change fixes a build problem that is causing some annoyances, in
a way that doesn't disable the entire driver on kernels without ALSA
support.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: Helight Xu <helight.xu@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>
drivers/platform/x86/Kconfig
drivers/platform/x86/thinkpad_acpi.c