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

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Date:	Fri, 1 Apr 2016 00:09:18 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Mark Brown <broonie@...nel.org>
CC:	Bjorn Andersson <bjorn@...o.se>,
	Bjorn Andersson <bjorn.andersson@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Liam Girdwood <lgirdwood@...il.com>,
	"Stephen Warren" <swarren@...dotorg.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Gandhar Dighe <gdighe@...dia.com>,
	"Stuart Yates" <syates@...dia.com>
Subject: Re: [PATCH 1/2] regulator: DT: Add support to scale ramp delay based
 on platform behavior


On Friday 01 April 2016 12:15 AM, Mark Brown wrote:
> * PGP Signed by an unknown key
>
> On Fri, Apr 01, 2016 at 12:01:19AM +0530, Laxman Dewangan wrote:
>> On Friday 01 April 2016 12:01 AM, Mark Brown wrote:
>>> So the PMIC actually has a setting for the rate you're seeing but for
>>> some resaon you can't use it?
>> PMIC has the different rate setting what I am seeing on platform (measured).
>> HW team measured the ramp dealy with specific configuration of rate setting
>> on PMIC which is not default (OTP-One time programmed from Vendor).
> That doesn't tell me what happens if you just configure the device to
> deliver the rate you're observing...

The setting for observed value is not there for device configuration.

Device support 5mV/us and 100mV/us.

We observed 50mV/us when setting device to 100mV/us.