linux-kernel - Re: [RESEND PATCH 2/3] regulator: Add support for stm32-vrefbuf

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Date:   Wed, 30 Aug 2017 11:11:24 +0200
From:   Fabrice Gasnier <fabrice.gasnier@...com>
To:     Mark Brown <broonie@...nel.org>
CC:     <lgirdwood@...il.com>, <robh+dt@...nel.org>,
        <alexandre.torgue@...com>, <mark.rutland@....com>,
        <mcoquelin.stm32@...il.com>, <linux@...linux.org.uk>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [RESEND PATCH 2/3] regulator: Add support for stm32-vrefbuf

On 08/29/2017 08:57 PM, Mark Brown wrote:
> On Mon, Aug 28, 2017 at 02:58:52PM +0200, Fabrice Gasnier wrote:
> 
>> +	ret = clk_prepare_enable(priv->clk);
>> +	if (ret) {
>> +		dev_err(&pdev->dev, "clk prepare failed\n");
> 
> If you're printing an error include the error code, it'll help users
> figure out what went wrong.
Hi Mark,

Thanks for reviewing,
I'll add it in v2.
> 
>> +	dev_info(&pdev->dev, "STM32 VREFBUF initialized\n");
> 
> This is just noise, remove it.

I'll remove it in v2.
> 
>> +static int __init stm32_vrefbuf_init(void)
>> +{
>> +	return platform_driver_register(&stm32_vrefbuf_driver);
>> +}
>> +subsys_initcall(stm32_vrefbuf_init);
> 
> Why is this at subsys_initcall()?
> 
Several consumers depend on it when it's being used, among which: STM32
internal ADC and DAC, but also external components. Purpose is to ensure
it's ready before these drivers gets probed, instead of being deferred.
Is it ok to keep it ?

Please let me know,
Best Regards,
Fabrice