linux-kernel - Re: [RFT v3 06/14] regulator: max77802: Remove support for board files

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 30 Oct 2014 13:21:00 +0100
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
CC:	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>
Subject: Re: [RFT v3 06/14] regulator: max77802: Remove support for board
 files

Hello Krzysztof,

On 10/30/2014 01:10 PM, Krzysztof Kozlowski wrote:
>> 
>> I may be missing something but I don't understand why a compatible string
>> for the regulators sub-node is needed. Isn't enough to just fill the
>> .regulators_node field in the struct regulator_desc? e.g:
>> 
>>     .regulators_node = of_match_ptr("regulators") for max77802
>>     .regulators_node = of_match_ptr("voltage-regulators") for max77686
>> 
>> AFAIU this should be enough for the core to extract the init_data and will
>> make your change much more simpler and you can drop patches 1-3 and 13-14.
>> 
>> Or maybe I misread the regulator_of_get_init_data() function?
> 
> The regulator_of_get_init_data() searches from dev->of_node or its child
> node.
> 
> But dev->of_node is NULL.
> 
> That's why of_compatible is needed.

Yes but regulator_register() does dev = config->dev and config->dev is set
to config.dev = iodev->dev in the driver probe function which is the
pdev->dev.parent (the PMIC struct device) that has an associated of_node.

So, regulator_of_get_init_data() will call of_get_child_by_name() passing
the PMIC of_node and the sub-node name that contains the regulators. That
is, whatever was set in desc->regulators_node and that should be enough.

Best regards,
Javier

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/