On Fri Oct 18, 2024 at 12:11 PM CEST, Krzysztof Kozlowski wrote: > On 18/10/2024 11:22, Diederik de Haas wrote: > > The GPIO polarity of the 'shutdown-gpios' property needs to be > > ACTIVE_HIGH or the Bluetooth device won't work. > > This also matches what other devices with the same BT device have. > > This should match the hardware. Fair point. The only documentation I have for the AzureWave-CM256SM is a datasheet. Para "3.4 Power up Timing Sequence" of that datasheet has the following: "The AW-CM256SM has two signals that enable or disable the Bluetooth and WLAN circuits and the internal regulator blocks, allowing the host to control power consumption." WL_REG_ON: "When this pin is high, the regulators are enabled and the WLAN section is out of reset. When this pin is low, the WLAN section is in reset. If BT_REG_ON and WL_REG_ON are both low, the regulators are disabled." BT_REG_ON: "If both BT_REG_ON and WL_REG_ON are low, the regulators will be disabled. When this pin is low and WL_REG_ON is high, the BT section is in reset."
