TDA4VEN-Q1: How to enable TDA4Ventry WKUP_LFOSC0_XI/XO connected 32.768KHz crystal.

Part Number: TDA4VEN-Q1

Tool/software:

Hi Experts:

My customer want enable TDA4Ventry WKUP_LFOSC0_XI/XO pin's RTC feature. 

I has tested TDA4Ventry EVM board with RDK09.02 release, crystal Y3 do not send out 32.768K clock. At TRM introduce default mode WKUP_LFOSC0 is disabled. 

How we can enable those 32.768K crystal?

Best Regards!

Han Tao

At linux use bind command enable rtc-ti-k3 but failed. From system log this module driver has been loaded.

root@j722s-evm:/sys/bus/platform/drivers/rtc-ti-k3# echo 2b1f0000.rtc > bind
-sh: echo: write error: Device or resource busy
root@j722s-evm:/sys/bus/platform/drivers/rtc-ti-k3# rtc-ti-k3^C
root@j722s-evm:/sys/bus/platform/drivers/rtc-ti-k3# dmesg|grep -i rtc
[ 10.610640] rtc-ti-k3 2b1f0000.rtc: registered as rtc0
[ 10.625237] rtc-ti-k3 2b1f0000.rtc: setting system clock to 1970-01-01T00:00:01 UTC (1)
[ 10.860629] tidss 30220000.dss: [drm] Cannot find any crtc or sizes
[ 10.869934] tidss 30220000.dss: [drm] Cannot find any crtc or sizes
[1541470.595035] rtc-ti-k3 2b1f0000.rtc: Failed to fence(-110)! Potential config issue?
root@j722s-evm:/sys/bus/platform/drivers/rtc-ti-k3# [1546782.730204] audit: type=1334 audit(1710633601.503:55): prog-id=37 op=LOAD
[1546782.882393] audit: type=1334 audit(1710633601.655:56): prog-id=37 op=UNLOAD