linux-kernel - Re: [RFC PATCH] regulator: palmas: enable all modes for SMPS10

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Date:	Tue, 4 Jun 2013 15:13:27 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Mark Brown <broonie@...nel.org>
CC:	Laxman Dewangan <ldewangan@...dia.com>,
	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"gg@...mlogic.co.uk" <gg@...mlogic.co.uk>,
	"ian@...mlogic.co.uk" <ian@...mlogic.co.uk>,
	"balbi@...com" <balbi@...com>
Subject: Re: [RFC PATCH] regulator: palmas: enable all modes for SMPS10

Hi,

On Tuesday 04 June 2013 03:08 PM, Mark Brown wrote:
> On Tue, Jun 04, 2013 at 02:38:08PM +0530, Kishon Vijay Abraham I wrote:
>> On Sunday 02 June 2013 02:35 AM, Mark Brown wrote:
>
>>> This is still not making any sense.  The quality of regulation and
>>> output voltage are essentially orthogonal, and obviously there's a
>>> specific API for bypass which is something different again to both
>>> mode and output voltage selection.
>
>> Do you recommend adding API's (similar to bypass) for BOOST and SWITCH?
>
> No.  A boost regulator is still a voltage regulator, it just happens to
> raise rather than lower the voltage but it's otherwise a normal
> regulator.  I'm not sure what you mean by "SWITCH" - from the name it'd
> just be a bypass?

Copy-pasting Laxman's explanation

<...>

Palma have SMPS10 regulator which can generate two voltage level 3.75 
and 5V.
This SMPS10 has the two outputs OUT1 and OUT2 and having one input IN1.

SMPS10-OUT2 is always connected to SMPS10-IN1 via following logic:
- Through parasitic diode (no sw control)
- In bypass mode (bit  configuration is there to enable/disable Bypass)
- In Boost mode (bit configuration is there to enable/disable Boost mode)

SMPS10-OUT1 is connected to the SMPS10-OUT2 pin through Switch (SW 
control for enabling/disabling this switch).

<...>

Thanks
Kishon
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