Hello!
I am sorry for the inexcusable delay on this. I am continuing to ask when this will be available.
In the meantime, can you try this for setting up the I2S signals from the u-boot command prompt …
- Configure the pinmux registers for I2S4
# mw 0x70003144 0x6044
# mw 0x70003148 0x6044
# mw 0x7000314c 0x6044
# mw 0x70003150 0x6044
- Read the corresponding GPIO_CNF register for I2S4
# md 0x6000d204 1
- Write the GPIO_CNF register (to enable I2S4)
In my case step 2 returns the value 000000f0 …
Tegra210 (P3450-Porg) # md 0x6000d204 1
6000d204: 000000f0
We need to clear bits [7:4] if they are set. In my case they are and because bits [3:0] are not set, I simply write 0 to this register. However, if any of the bits [3:0] are set you should ensure you do not clear them.
# mw 0x6000d204 0
Regards,
Jon