linux-kernel - Re: [PATCH v5 4/5] regulator: add regulator driver of hi655x pmic

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Date:	Tue, 12 Jan 2016 10:18:03 +0800
From:	chenfeng <puck.chen@...ilicon.com>
To:	Mark Brown <broonie@...nel.org>
CC:	<lee.jones@...aro.org>, <linux-kernel@...r.kernel.org>,
	<lgirdwood@...il.com>, <yudongbin@...ilicon.com>,
	<saberlily.xia@...ilicon.com>, <suzhuangluan@...ilicon.com>,
	<kong.kongxinwei@...ilicon.com>, <xuyiping@...ilicon.com>,
	<z.liuxinliang@...ilicon.com>, <puck.chenfeng@...il.com>,
	<weidong2@...ilicon.com>, <w.f@...wei.com>,
	<qijiwen@...ilicon.com>, <peter.panshilin@...ilicon.com>,
	<dan.zhao@...ilicon.com>, <linuxarm@...wei.com>,
	<liguozhu@...ilicon.com>
Subject: Re: [PATCH v5 4/5] regulator: add regulator driver of hi655x pmic



On 2016/1/12 2:24, Mark Brown wrote:
> On Mon, Jan 11, 2016 at 08:20:16PM +0800, Chen Feng wrote:
> 
>> +config REGULATOR_HI655X
>> +	tristate "Hisilicon HI655X PMIC regulators support"
>> +	depends on ARCH_HISI || (COMPILE_TEST && ARM64)
> 
> Why does this depend on ARM64?  If it's needed it probably indicates a
> problem...
> 
There will be compile warning with arch parisc.

Add the current support platform is ARM64.
>> +	np = of_get_child_by_name(dev->parent->of_node, "regulators");
>> +	if (!np)
>> +		return -ENODEV;
>> +
>> +	ret = of_regulator_match(dev, np,
>> +				 hi655x_regulator_match,
>> +				 ARRAY_SIZE(hi655x_regulator_match));
> 
> Like I said on the previous version:
> 
> | Don't open code this, use the standard support with of_match and
> | regulators_node.
> 
> The code is now using of_match but still open coding regulators_node.
> 
I am not sure about open coding regulators_node.

I take max8907-regulator.c for reference. The code there is:
224 static int max8907_regulator_parse_dt(struct platform_device *pdev)
225 {
226         struct device_node *np, *regulators;
227         int ret;
228
229         np = pdev->dev.parent->of_node;
230         if (!np)
231                 return 0;
232
233         regulators = of_get_child_by_name(np, "regulators");
	    ...
238
239         ret = of_regulator_match(&pdev->dev, regulators, max8907_matches,
240                                  ARRAY_SIZE(max8907_matches));

249 }

Can you give me some references? Really thanks for your help.

ChenFeng