linux-pinenote/drivers/mailbox/Kconfig

menuconfig MAILBOX
	bool "Mailbox Hardware Support"
	help
	  Mailbox is a framework to control hardware communication between
	  on-chip processors through queued messages and interrupt driven
	  signals. Say Y if your platform supports hardware mailboxes.

if MAILBOX
config PL320_MBOX
	bool "ARM PL320 Mailbox"
	depends on ARM_AMBA
	help
	  An implementation of the ARM PL320 Interprocessor Communication
	  Mailbox (IPCM), tailored for the Calxeda Highbank. It is used to
	  send short messages between Highbank's A9 cores and the EnergyCore
	  Management Engine, primarily for cpufreq. Say Y here if you want
	  to use the PL320 IPCM support.

config OMAP_MBOX
	tristate
	help
	  This option is selected by any OMAP architecture specific mailbox
	  driver such as CONFIG_OMAP1_MBOX or CONFIG_OMAP2PLUS_MBOX. This
	  enables the common OMAP mailbox framework code.

config OMAP1_MBOX
	tristate "OMAP1 Mailbox framework support"
	depends on ARCH_OMAP1
	select OMAP_MBOX
	help
	  Mailbox implementation for OMAP chips with hardware for
	  interprocessor communication involving DSP in OMAP1. Say Y here
	  if you want to use OMAP1 Mailbox framework support.

config OMAP2PLUS_MBOX
	tristate "OMAP2+ Mailbox framework support"
	depends on ARCH_OMAP2PLUS
	select OMAP_MBOX
	help
	  Mailbox implementation for OMAP family chips with hardware for
	  interprocessor communication involving DSP, IVA1.0 and IVA2 in
	  OMAP2/3; or IPU, IVA HD and DSP in OMAP4/5. Say Y here if you
	  want to use OMAP2+ Mailbox framework support.

config OMAP_MBOX_KFIFO_SIZE
	int "Mailbox kfifo default buffer size (bytes)"
	depends on OMAP2PLUS_MBOX || OMAP1_MBOX
	default 256
	help
	  Specify the default size of mailbox's kfifo buffers (bytes).
	  This can also be changed at runtime (via the mbox_kfifo_size
	  module parameter).
endif