Re: [PATCH] arm64: dts: qcom: monaco-evk: Add off timing constraints for vreg_l8a

[Manivannan Sadhasivam]

On Thu, Oct 01, 2026 at 06:37:53PM +0530, Jishnu Prakash wrote:
> UFS on the Monaco EVK can fail to initialize after probe deferral when
> vreg_l8a is re-enabled before the supply has fully stabilized. This is
> caused by the increased discharge and recharge time introduced by
> additional board-level capacitance in the shared power supply design.
> 
> Add the hardware-required off-on-delay and enable-ramp-delay for
> vreg_l8a to ensure proper power sequencing and reliable UFS
> initialization across re-probe scenarios.
> 
> Additionally, set qcom,regulator-off-debounce-delay-us so that quick
> disable/enable bounces across probe-defer retries don't power-cycle
> the rail in hardware at all, rather than needing to wait out the full
> off-on delay on every retry.
> 

This last sentence gives me the impression that we only need
'qcom,regulator-off-debounce-delay-us' and not the other two delays.

- Mani

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