arm64: dts: sc7180: Add wakeup support over UART RX
Hi Matthias,
Quoted 34 lines · Matthias Kaehlcke
Quoted 21 lines · satya priya
Add the necessary pinctrl and interrupts to make UART wakeup capable.
Signed-off-by satya priya <[email protected]>Reviewed-by Akash Asthana <[email protected]>---
Changes in V2:
- As per Matthias's comment added wakeup support for all the UARTs of SC7180.Changes in V3:
- No change.arch/arm64/boot/dts/qcom/sc7180.dtsi | 98 ++++++++++++++++++++++++++++++------ 1 file changed, 84 insertions(+), 14 deletions(-)arch/arm64/boot/dts/qcom/sc7180.dtsi +0
-0arch/arm64/boot/dts/qcom/sc7180.dtsi
Quoted 8 lines
arch/arm64/boot/dts/qcom/sc7180.dtsi +5
-0+ qup_uart0_sleep: qup-uart0-sleep { + pinmux { + pins = "gpio34", "gpio35", + "gpio36", "gpio37"; + function = "gpio";What is the reason that the GPIO function needs to be selected in sleep mode to support wakeup?
Quoted 1 line
This should be explained in the commit message unless it is evident.
When QUP function is selected in sleep state, RTS/RFR is pulled high as soon as we enter suspend and not receiving wakeup bytes from BT SoC to wakeup device. Whereas in GPIO mode it is staying low and receiving data.
Thanks,
Satya Priya