I've made a lot of progress getting the DTBO correct for my cape. I think the CODEC is configured, although I don't know how to test it. But the simple-sound-card is still giving me some issues. It reports "could not get #sound-dai-cells for /ocp/mcasp@48038000". I tried adding #sound-dai-cells = <0>; to the node, but it didn't seem to have any effect. Here's the DTO:
https://github.com/JetForMe/podtique/blob/master/bbb/cape/Podtique1/BB-ENABLE-PRU.dts
And dmesg says this:
[ 45.197340] bone_capemgr bone_capemgr: part_number 'BB-ENABLE-PRU', version 'N/A'
[ 45.197383] bone_capemgr bone_capemgr: slot #4: override
[ 45.197400] bone_capemgr bone_capemgr: Using override eeprom data at slot 4
[ 45.197417] bone_capemgr bone_capemgr: slot #4: 'Override Board Name,00A0,Override Manuf,BB-ENABLE-PRU'
[ 45.197548] bone_capemgr: bone_capemgr bone_capemgr: slot #4: Requesting part number/version based 'BB-ENABLE-PRU-00A0.dtbo
[ 45.197567] bone_capemgr: bone_capemgr bone_capemgr: slot #4: Requesting firmware 'BB-ENABLE-PRU-00A0.dtbo' for board-name 'Override Board Name', version '00A0'
[ 45.197737] bone_capemgr: bone_capemgr bone_capemgr: slot #4: dtbo 'BB-ENABLE-PRU-00A0.dtbo' loaded; converting to live tree
[ 45.213769] gpio-of-helper ocp:gpio_helper: ready
[ 45.214448] gpiolib_of: of_get_named_gpiod_flags: parsed 'gpio' property of node '//fixedregulator@1[0]' - status (0)
[ 45.214733] core: lz-codec-reg: no parameters
[ 45.214826] fixed: reg-fixed-voltage fixedregulator@1: lz-codec-reg supplying 0uV
[ 45.228817] pruss_uio 4a300000.pruss: pins are not configured from the driver
[ 45.232434] bone_capemgr bone_capemgr: slot #4: dtbo 'BB-ENABLE-PRU-00A0.dtbo' loaded; overlay id #0
[ 45.281918] gpiolib_of: of_get_named_gpiod_flags: parsed 'gpio-reset' property of node '/ocp/i2c@4819c000/tlv320aic3104@0[0]' - status (0)
[ 45.281980] core: tlv320aic3x-codec 2-0018: Looking up IOVDD-supply from device tree
[ 45.282082] core: tlv320aic3x-codec 2-0018: Looking up DVDD-supply from device tree
[ 45.282152] core: tlv320aic3x-codec 2-0018: Looking up AVDD-supply from device tree
[ 45.282213] core: tlv320aic3x-codec 2-0018: Looking up DRVDD-supply from device tree
[ 45.282284] snd_soc_core: tlv320aic3x-codec 2-0018: codec register 2-0018
[ 45.282318] snd_soc_core: tlv320aic3x-codec 2-0018: ASoC: dai register 2-0018 #1
[ 45.282332] snd_soc_core: tlv320aic3x-codec 2-0018: ASoC: Registered DAI 'tlv320aic3x-hifi'
[ 45.282349] snd_soc_core: tlv320aic3x-codec 2-0018: ASoC: Registered codec 'tlv320aic3x-codec.2-0018'
[ 45.283805] //sound/simple-audio-card,cpu: could not get #sound-dai-cells for /ocp/mcasp@48038000
[ 45.331909] snd_soc_core: davinci-mcasp 48038000.mcasp: ASoC: dai register 48038000.mcasp #1
[ 45.331945] snd_soc_core: davinci-mcasp 48038000.mcasp: ASoC: Registered DAI '48038000.mcasp'
[ 45.332106] snd_soc_core: davinci-mcasp 48038000.mcasp: ASoC: Registered platform '48038000.mcasp'
[ 45.358913] asoc-simple-card sound: parse error -22
[ 45.374127] asoc-simple-card: probe of sound failed with error -22
I have gpio1[18] controlling two voltage regulators that power the CODEC. The regulator node seems to bring that up just fine.
gpio1[19] is the active-low reset to the CODEC. I haven't yet seen that go high, although I haven't put a scope on it during the DTO load to see if it's getting any traffic.
I'd love to know how to fix the sound node, and how to poke at the CODEC to see if it's alive (via the driver; I was able to use i2cget to look at registers).
Thanks!