linux-kernel - Re: [PATCH v8 4/6] power: supply: Add support for mps mp2629 battery charger

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Message-ID: <6cfab0a6-c3eb-bd9b-6572-b49e3205524f@gmail.com>
Date:   Mon, 13 Apr 2020 22:28:19 +0200
From:   saravanan sekar <sravanhome@...il.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Lee Jones <lee.jones@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald <pmeerw@...erw.net>,
        Sebastian Reichel <sre@...nel.org>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-iio <linux-iio@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v8 4/6] power: supply: Add support for mps mp2629 battery
 charger

Hi Andy,

On 13/04/20 10:10 pm, Andy Shevchenko wrote:
> On Mon, Apr 13, 2020 at 8:37 PM Saravanan Sekar <sravanhome@...il.com> wrote:
>> The mp2629 provides switching-mode battery charge management for
>> single-cell Li-ion or Li-polymer battery. Driver supports the
>> access/control input source and battery charging parameters.
> ...
>
>> +static int mp2629_charger_probe(struct platform_device *pdev)
>> +{
>> +       irq = platform_get_irq(to_platform_device(pdev->dev.parent), 0);
> Why not to use temporary variable dev?
>
> This should be platform_get_irq_optional().


Platform_get_irq in turn calls platform_get_irq_optional. It was 
suggested by Lee and is it mandatory to change it?

>> +       if (irq) {
>> +               ret = devm_request_irq(dev, irq, mp2629_irq_handler,
>> +                                IRQF_TRIGGER_RISING, "mp2629-charger",
>> +                                charger);
>> +               if (ret) {
>> +                       dev_err(dev, "failed to request gpio IRQ\n");
>> +                       goto iio_fail;
>> +               }
>> +       }
>> +}