| Message ID | 1651228073-1999-1-git-send-email-quic_bgodavar@quicinc.com |
|---|---|
| Headers | show |
| Series | WAR to handle WCN6750 hardware issue | expand |
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(-) >