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TPS2552D: What is the appropriate linux driver

Simon Plantier
Prodigy 10 points
Part Number: TPS2552D

Tool/software:

Hi,

I'm working on a custom board based on an AM62 with a 6.1 linux kernel using the TPS2552DBVT to manage the power supply of an SD card. I am having difficulties with the driver choice in linux for that component. It didn't find a dedicated one and the "regulator-fixed" seems like the right generic driver. However, while the fault pin of the component is connected to the SOC, I don't find a device tree binding for it and don't know what to do with it so I have the following questions.

Is there a dedicated driver I missed ?

If it's not the case, is there a better suited generic one ?

If there isn't a better suited generic one, how the fault pin should be managed in a device tree ?

Thanks in advance for your support.

  • +1
    TI__Guru*** 145886 points

    Hi Simon,

    A quick search in kernel doesn't find a device driver for TPS2552D. But I don't think you need a driver for handling its fault pin, I don't think there is likely to be any condition which causes over-current in SD card applications.

  • 0 in reply to Bin Liu
    Prodigy 10 points

    Hi Bin,

    Thanks for the quick answer. I understand that I don't need to bind the fault pin to anything then. For the driver, does that mean the simple fixed-regulator one should work ? Or is making a specific one required ?

    Thanks

  • +1 in reply to Simon Plantier
    TI__Guru*** 145886 points

    Hi Simon,

    Yes, you can use "regulator-fixed" for this switch. Its enable pin should be controlled by a GPIO, this should be specified in the device tree too.

    Please refer to the "vdd_mmc1" node in kernel devic tree k3-am625-sk.dts.