On 29/04/2022 13:27, Balakrishna Godavarthi wrote:
On WCN6750 sometimes observed AON power source takes 100ms time to fully discharge voltage during OFF. As WCN6750 is combo chip for WLAN and BT. If any of the tech area ON is triggered during discharge phase, it fails to turn ON. To overcome this hardware issue, During BT ON, driver check for WLAN_EN pin status. If it high, it will pull BT_EN to high immediately else it will wait for 100ms assuming WLAN was just powered OFF and then BT_EN will be pulled to high.
Ugh. This adds another point to support separate power sequencer device for WiFi+BT devices. Let me refresh my last patchset, so that we can implement it as a part of common code, rather than hacking hci_qca on and on.
Balakrishna Godavarthi (3): dt-bindings: net: bluetooth: Add wlan-gpio entry for wcn6750 arm64: dts: qcom: sc7280: Add wlan enable gpio to bluetooth node Bluetooth: hci_qca: WAR to handle WCN6750 HW issue .../bindings/net/qualcomm-bluetooth.yaml | 6 +++++ arch/arm64/boot/dts/qcom/sc7280-idp.dtsi | 1 + drivers/bluetooth/hci_qca.c | 30 +++++++++++++++++----- 3 files changed, 31 insertions(+), 6 deletions(-)
-- With best wishes Dmitry
