Re: [PATCH 1/2] regulator: DT: Add support to scale ramp delay based on platform behavior

From: Mark Brown
Date: Thu Mar 31 2016 - 14:31:50 EST

On Thu, Mar 31, 2016 at 11:17:38PM +0530, Laxman Dewangan wrote:

> HW and chip team did simulation with tegra and PMIC and found that the board
> needs more capacitance then what Vendor recommended for proper signal
> conditioning on interface. So they put the difference capactitance value and
> this causes deviation in ramp delay from advertised value. In out design, we
> measured the ramp time as 50mv/us when PMIC is configured for 100mV/us.

> So for all settling time, we need to use the ramp as 50mV/us.

> From DT, I will provide regulator-ramp-delay as 50mv/us.

> But I do not have property for saying 100mv/us for PMIC configurations and
> this is what makes need of 2nd property.

So the PMIC actually has a setting for the rate you're seeing but for
some resaon you can't use it?

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