linux-kernel - Re: [PATCH v2 01/10] mfd: max77686: Convert to use regmap

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Date:	Wed, 18 Jun 2014 11:21:56 +0200
From:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>
To:	Doug Anderson <dianders@...omium.org>
CC:	Lee Jones <lee.jones@...aro.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Mark Brown <broonie@...nel.org>,
	Mike Turquette <mturquette@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Olof Johansson <olof@...om.net>,
	Sjoerd Simons <sjoerd.simons@...labora.co.uk>,
	Daniel Stone <daniels@...labora.com>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 01/10] mfd: max77686: Convert to use regmap_irq

Hello Doug,

On 06/17/2014 10:57 PM, Doug Anderson wrote:
> Javier,
> 
> On Mon, Jun 16, 2014 at 11:02 AM, Javier Martinez Canillas
> <javier.martinez@...labora.co.uk> wrote:
>> @@ -127,15 +175,48 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
>>         }
>>         i2c_set_clientdata(max77686->rtc, max77686);
>>
>> -       max77686_irq_init(max77686);
>> +       max77686->rtc_regmap = devm_regmap_init_i2c(max77686->rtc,
>> +                                                   &max77686_rtc_regmap_config);
>> +       if (IS_ERR(max77686->rtc_regmap)) {
>> +               ret = PTR_ERR(max77686->rtc_regmap);
>> +               dev_err(max77686->dev, "failed to allocate RTC regmap: %d\n",
>> +                       ret);
>> +               goto err_unregister_i2c;
>> +       }
>> +
>> +       ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
>> +                                 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
>> +                                 IRQF_SHARED, 0, &max77686_irq_chip,
>> +                                 &max77686->irq_data);
>> +       if (ret != 0) {
>> +               dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
>> +               goto err_unregister_i2c;
>> +       }
>> +       ret = regmap_add_irq_chip(max77686->rtc_regmap, max77686->irq,
>> +                                 IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
>> +                                 IRQF_SHARED, 0, &max77686_rtc_irq_chip,
>> +                                 &max77686->rtc_irq_data);
>> +       if (ret != 0) {
>> +               dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
>> +               goto err_del_irqc;
>> +       }
>>
>>         ret = mfd_add_devices(max77686->dev, -1, max77686_devs,
>>                               ARRAY_SIZE(max77686_devs), NULL, 0, NULL);
>>         if (ret < 0) {
>> -               mfd_remove_devices(max77686->dev);
>> -               i2c_unregister_device(max77686->rtc);
>> +               dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
>> +               goto err_del_rtc_irqc;
>>         }
>>
>> +       return 0;
>> +
>> +err_del_rtc_irqc:
>> +       regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
>> +err_del_irqc:
>> +       regmap_del_irq_chip(max77686->irq, max77686->irq_data);
> 
> I would imagine you either don't need these regmap_del_irq_chip() here
> or that you _do_ need them in max77686_i2c_remove().
> 
> ...from looking at other drivers I think the answer is to add them to
> max77686_i2c_remove().
> 
>

Yes, I forgot to do the regmap irqchip cleanup in the driver .remove function.
The same issue is in the max77802 driver btw so I'll fix both on v3.

Thanks a lot for pointing this out.

>> diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
>> index 8c75a9c..3a810b1 100644
>> --- a/include/linux/mfd/max77686-private.h
>> +++ b/include/linux/mfd/max77686-private.h
>> @@ -205,7 +205,7 @@ enum max77686_irq {
>>         MAX77686_PMICIRQ_140C,
>>         MAX77686_PMICIRQ_120C,
>>
>> -       MAX77686_RTCIRQ_RTC60S,
>> +       MAX77686_RTCIRQ_RTC60S = 0,
>>         MAX77686_RTCIRQ_RTCA1,
>>         MAX77686_RTCIRQ_RTCA2,
>>         MAX77686_RTCIRQ_SMPL,
>> @@ -215,6 +215,25 @@ enum max77686_irq {
>>         MAX77686_IRQ_NR,
> 
> Maybe remove MAX77686_IRQ_NR which no longer makes any sense now that
> you start over at 0 partway through.
> 
> 

Right, it is not needed anymore. I'll remove it when re-spin.

> Overall this looks good to me, so once nits above are fixed feel to
> add my Reviewed-by.  I've also built and booted this patch on
> exynos5250-snow and tested that the RTC wakealarm fires and can even
> wake the system up (with some additional work that I'll email you
> about).
>
> Reviewed-by: Doug Anderson <dianders@...omium.org>
> Tested-by: Doug Anderson <dianders@...omium.org>
> 

Great! thanks a lot for testing.

Best regards,
Javier
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