Bluetooth PCM Signals in OSD32MP1-RED Device Tree

Forums Reference, Evaluation, and Development Boards OSD32MP1-RED Bluetooth PCM Signals in OSD32MP1-RED Device Tree

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    • #12405
      Farid AzharFarid Azhar
      Participant

        Hi,

        We are using MuRata Module LBEE5HY1MW on our custom board. I’ve updated the module Firmware and device tree.

        WiFi is working OK but Bluetooth is not working, failing initialization in kernel driver with the following errors:

         

        Where are following Bluetooth signals defined in the OSD32MP1-RED board Devcie Tree files? I couldn’t find them. I want to make sure I’m not missing any signal in device tree.

        • BT_PCM_WS  (PZ3)
        • BT_PCM_SDO (PZ2)
        • BT_PCM_SDI (PZ1)
        • BT_PCM_CLK (PZ0)
        • BT_DEV_WAKE (PZ7)
        • BT_HOST_WAKE (PF14)

        Any help is much appreciated

        /Farid.

      • #12410
        Neeraj Dantu
        Moderator

          Farid,

          Bluetooth is implemented with USART interface connection to LBEE5KL1DX module. Take a look at USART2_XX signals on page 10 of the schematic: https://octavosystems.com/docs/osd32mp15x-red-schematic-pdf/. You can see the device tree entries for USART2 interface invoking the Bluetooth driver heer: https://github.com/octavosystems/osd32mp1-build-tools/blob/master/patches/linux-5.10/0024-Add-OSD32MP1-RED-Device-tree-support.patch#L1364.

          Note that you don’t need the PCM interface for Bluetooth to work. PCM interface is needed to transfer audio over Bluetooth.

          Best,
          Neeraj

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