TDA4VM: TDA4 with SJA1105 issue

yongliang li

Intellectual 490 points

Part Number: TDA4VM

Hi experts,

I am using the TDA4 with SJA1105 (SPI port) and my device tree is here.

k3-j721e.zip

I found the SPI_CS0(AA24) SPI_CLK(Y25) worked BUT the MOSI(ball AA26) signal was not detected (NO SIGNAL).

My linux SDK is 08_00_00_08 and my rtos SDK is 08_00_00_12.

I've deleted all pinmux about the ball AA26 defined in RTOS SDK.

Here is my connection:

I've followed the suggestion https://e2e.ti.com/support/processors/f/791/t/947437 and I got spi3 in the rootfs:/sys/class/spi_master

root@j7-evm:/sys/class/spi_master# ls -l
total 0
lrwxrwxrwx 1 root root 0 Sep 2 18:01 spi3 -> ../../devices/platform/bus@100000/2130000.spi/spi_master/spi3

Thanks,

over 3 years ago

0 yongliang li over 3 years ago

Intellectual 490 points

I used the

ti, pindir-d0-out-d1-in = <1>;

and got AA26 the MOSI signal, BUT when SPI_D1(AA29) is in high voltage, the read is also 0x00. I don't know why it happened.

0 Keerthy J over 3 years ago in reply to yongliang li

TI__Guru**** 163280 points

Hi,

Can you dump all the pin mux registers of all the pins you have configured via DT?

i.e for AA26, AA29, AA24 & Y25. You can use devmem2 in Linux to dump out all the registers.

Regards,
Keerthy

0 yongliang li over 3 years ago in reply to Keerthy J

Intellectual 490 points

These are my dts files.

6215.ti.zip

Thanks

0 Keerthy J over 3 years ago in reply to yongliang li

TI__Guru**** 163280 points

Hello,

Keerthy J said:
i.e for AA26, AA29, AA24 & Y25. You can use devmem2 in Linux to dump out all the registers.

I am asking you to dump out all the registers from Linux command prompt using devmem2.

devmem2 0x0011C144 w
devmem2 0x0011C148 w
devmem2 0x0011C14C w
devmem2 0x0011C11C w

Best Regards,
Keerthy

0 yongliang li over 3 years ago in reply to Keerthy J

Intellectual 490 points

root@j7-evm:~# devmem2 0x0011C144 w
/dev/mem opened.
Memory mapped at address 0xffffa7b90000.
Read at address 0x0011C144 (0xffffa7b9c144): 0x00050004
devmem2 0x0011C148 w
root@j7-evm:~# devmem2 0x0011C148 w
/dev/mem opened.
Memory mapped at address 0xffffb76b0000.
Read at address 0x0011C148 (0xffffb76bc148): 0x00050004
devmem2 0x0011C11C wroot@j7-evm:~# devmem2 0x0011C14C w
/dev/mem opened.
Memory mapped at address 0xffffb8fa0000.
Read at address 0x0011C14C (0xffffb8fac14c): 0x00050004
root@j7-evm:~# devmem2 0x0011C11C w
/dev/mem opened.
Memory mapped at address 0xffffadb20000.
Read at address 0x0011C11C (0xffffadb2c11c): 0x00050004
root@j7-evm:~#

0 Keerthy J over 3 years ago in reply to yongliang li

TI__Guru**** 163280 points

Hi,

Mux mode 4: 0x00050004 Looks alright. Can you share the complete Linux bootlog?

Regards,
Keerthy

+1 yongliang li over 3 years ago in reply to Keerthy J

Intellectual 490 points

the problem has been solved. The MCSPI3 is connected to other MCSPI internal by TDA4 (which is written in tda4 technical reference manual) and I didn't close the connection.But thanks anyway for your reply.

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TDA4VM: TDA4 with SJA1105 issue