[PATCH 5/7] ARM: dts: Add nodes for missing omap4 interconnect target modules

[Matthijs van Duin]

On Thu, Oct 12, 2017 at 09:07:55AM +0300, Peter Ujfalusi wrote:
> I don't see much benefit of using McASP on OMAP4, only drawbacks... It
> lacks AFIFO so it is prone to underrun and if it underruns you need to
> reset McASP. Been there with the Samsung Galaxy Nexus.

AESS/ATC isn't able to consistently respond to a DMA request within 20
us ?  Strange.. I would have expected it to have no trouble with that.
(And presumably so did TI, or they would have included AFIFO?)

> I wonder how Motorola is using the McASP as the OMAP4 version
> (officially) does not support I2S.

Hmm? I checked the omap4430 TRM and I don't see that mentioned. It seems
to have pins for i2s transmit:

	abe_mcasp_axr              O     Audio transmit data
	abe_mcasp_aclkx            O     Transmit bit clock
	abe_mcasp_ahclkx           O     Transmit high-frequency master clock
	abe_mcasp_afsx             O     Transmit frame synchronization
	abe_mcasp_amute            O     Mute out to external
	abe_mcasp_amutein          I     Mute in from external

If it supported s/pdif tx only, then all of these except axr would be
useless.

Matthijs