thinkpad-acpi: make volume subdriver optional
commitdbb491ea6a174cdc282e12359298d69ab5fb6376
authorHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Sun, 27 Dec 2009 19:02:10 +0000 (27 17:02 -0200)
committerHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Sat, 20 Feb 2010 22:01:43 +0000 (20 20:01 -0200)
tree53e16102c145c1284b718e248d299f405b380a34
parentda0eabe482f67ce4ab49603a2560d7937337d05b
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