TDA2HG: The relationship between PMIC and XHCI

Sans

Part Number: TDA2HG

Hi,

My software version: visionSDK3.08.

Our hardware needs to place PMIC control under MCU control. When I modify the kernel PMIC configuration, I encountered a strange problem.

After I commented the tps65917 in the dts, the USB cannot work.

Use the lsmod command to find that the following drivers are burned:

xhci_plat_hcd 16384 0
xhci_hcd 143360 1 xhci_plat_hcd
usbcore 217088 2 xhci_plat_hcd,xhci_hcd

What is the relationship between XHCI and PMIC?

Do I have to control the PMIC in the kernel to use the usb function?

over 5 years ago

0 Praveen Rao over 5 years ago

TI__Mastermind 48463 points

Hi,

The USB controller and the USB PHY have a direct dependency on the PMIC and hence disabling PMIC control from the kernel code can have undesired behavior and failure. Suggest you to the look into the TRM's USB chapter for details https://www.ti.com/lit/pdf/sprui29

Thanks.

0 Sans over 5 years ago in reply to Praveen Rao

Intellectual 450 points

Hi,

Re-checked the code and found that the phy-supply of usb2 in dts has no comments.

The problem has been solved.

Thanks.

0 Praveen Rao over 5 years ago in reply to Sans

TI__Mastermind 48463 points

Thanks for confirming that the issue is resolved. Closing the ticket.

Processors

Processors forum

TDA2HG: The relationship between PMIC and XHCI