Kconfig

config SND_PPSP
       tristate "PP-Speaker support (READ HELP!)"
       depends on PCSPKR_PLATFORM && X86 && HIGH_RES_TIMERS
       depends on INPUT
       select SND_PCM
       help
         If you don't have a sound card in your computer, you can include a
         driver for the PP speaker which allows it to act like a primitive
         sound card.
         This driver also replaces the pcspkr driver for beeps.

         You can compile this as a module which will be called snd-ppsp.

         WARNING: if you already have a soundcard, enabling this
         driver may lead to a problem. Namely, it may get loaded
         before the other sound driver of yours, making the
         pp-speaker a default sound device. Which is likely not
         what you want. To make this driver play nicely with other
         sound driver, you can add this in a configuration file under
         /etc/modprobe.d/ directory:
         options snd-ppsp index=2

         You don't need this driver if you only want your pc-speaker to beep.
         You don't need this driver if you have a tablet piezo beeper
         in your PC instead of the real speaker.

         Say N if you have a sound card.
         Say M if you don't.
         Say Y only if you really know what you do.