linux-kernel - Re: [PATCH 2/2] regulator: palmas: model SMPS10 as two regulators

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Date:	Sat, 22 Jun 2013 18:42:28 +0530
From:	Laxman Dewangan <ldewangan@...dia.com>
To:	Kishon Vijay Abraham I <kishon@...com>
CC:	"broonie@...nel.org" <broonie@...nel.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"rob@...dley.net" <rob@...dley.net>,
	"lgirdwood@...il.com" <lgirdwood@...il.com>,
	Stephen Warren <swarren@...dia.com>,
	"gg@...mlogic.co.uk" <gg@...mlogic.co.uk>,
	"sameo@...ux.intel.com" <sameo@...ux.intel.com>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] regulator: palmas: model SMPS10 as two regulators

On Friday 21 June 2013 07:30 PM, Kishon Vijay Abraham I wrote:
> On Friday 21 June 2013 06:55 PM, Laxman Dewangan wrote:
>> On Thursday 20 June 2013 08:56 PM, Kishon Vijay Abraham I wrote:
>>> Hi,
>>>
>>> On Thursday 20 June 2013 08:14 PM, Laxman Dewangan wrote:
>>>> Have you added the regulator supply entries?
>>>> Are you testing on mainline linux-next?
>>> Not in linux-next :-( Tested only with mainline.
>>> Does inverting the order helps?
>>>
>> I think because you do not have entry of supply in your dt node, it gets
>> ignored by regulator_dev_lookup() and continue.
>>
>> I made the entry like (added entry form smps10-out2-supply and smps10-in-supply
>> in dt node) and then it failed.
>> /***
>>
>> +                           smps10-out2-supply = <&palmas_smps10_out2_reg>;
>> +                           smps10-in-supply = <&tps65090_dcdc3_reg>;
>>                               ldo3-in-supply = <&palmas_smps3_reg>;
>> @@ -903,6 +905,20 @@
>>                                           regulator-always-on;
>>                                   };
>>
>> +                               palmas_smps10_out1_reg: smps10_out1 {
>> +                                       regulator-name = "smps10_out1";
>> +                                       regulator-min-microvolt = <5000000>;
>> +                                       regulator-max-microvolt = <5000000>;
>> +                                       regulator-always-on;
>> +                               };
>> +
>> +                               palmas_smps10_out2_reg: smps10_out2 {
>> +                                       regulator-name = "smps10_out2";
>> +                                       regulator-min-microvolt = <5000000>;
>> +                                       regulator-max-microvolt = <5000000>;
>> +                                       regulator-always-on;
>> +                               };
>> +
>> **/
>>
>>
>> After reversing the sequence, it worked fine.
> You mean, changing the order in dt node helped?

The sequence on DT does not matter. We register the regulators in the 
sequence it is having enums value for regulator-id in loop. So we need 
to revert there.

Yaah, it looks odd that SMPS10-OUT2come before SMPS10-OUT1 in enums 
definition.

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