Bluetooth: btintel: Add support to reset bluetooth via ACPI DSM

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New Intel platforms supports reset of Bluetooth device  via ACPI DSM
methods. The legacy reset mechanism via GPIO will be deprecated in
future. This patch checks the platform support for reset methods and if
supported uses the same instead of legacy GPIO toggling method.

ACPI firmware supports two types of reset method based on NIC card.
(Discrete or Integrated).

1. VSEC Type - Vendor Specific Extended Capability. Here  BT_EN and
   BT_IF_SELECT lines are driven by a register in PCH cluster. This
   interface is supported on discrete BT solution.

2. WDISABLE2 - In this soluton, W_DISABLE2 pin in M.2 is connected to
   physical GPIO from PCH. The DSM interface shall toggle this to recover
   from  error.

Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

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Kiran K 2023-06-11 12:13:42 +05:30 • committed by Luiz Augusto von Dentz

parent 06d3fdfcdf

commit 8f0a3786f5

3 changed files with 139 additions and 0 deletions

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121

drivers/bluetooth/btintel.c

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2

drivers/bluetooth/btintel.h

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16

drivers/bluetooth/btusb.c

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