Bluetooth: btnxpuart: Check remote M.2 connector availability before pwrseq

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The current code uses of_graph_is_present() to decide whether to enter
the pwrseq path. However, of_graph_is_present() only checks for the
structural presence of a port/ports sub-node and does not check the
status property. This causes problems when a DT overlay disables the
remote M.2 connector node (e.g., switching from PCIe WiFi to SDIO WiFi):
the port node still exists, so of_graph_is_present() returns true, but
the pwrseq provider never registers because the connector is disabled,
leading to an infinite -EPROBE_DEFER loop.

Replace of_graph_is_present() with a new helper that traverses the OF
graph to the remote port parent (the M.2 connector node) and checks
of_device_is_available(). When the remote connector is disabled, the
pwrseq path is skipped, allowing the BT driver to fall through to the
direct bluetooth child node path.

Fixes: e48e332d84 ("Bluetooth: btnxpuart: Add M.2 Bluetooth device support using pwrseq")
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

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Sherry Sun 2026-08-17 10:27:39 +08:00 • committed by Luiz Augusto von Dentz

parent fa0ad2d277

commit 3b8f8d6323

1 changed files with 23 additions and 1 deletions

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drivers/bluetooth/btnxpuart.c

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