linux-kernel - Re: [RFC v3 2/7] platform/x86: intel_pmc_ipc: Use MFD framework to create dependent devices

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Message-ID: <6b854d35-6430-c790-3608-15cefac03a52@linux.intel.com>
Date:   Tue, 3 Oct 2017 18:00:15 -0700
From:   sathyanarayanan kuppuswamy 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        "x86@...nel.org" <x86@...nel.org>,
        Wim Van Sebroeck <wim@...ana.be>,
        Ingo Molnar <mingo@...hat.com>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Zha Qipeng <qipeng.zha@...el.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "dvhart@...radead.org" <dvhart@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Lee Jones <lee.jones@...aro.org>,
        Andy Shevchenko <andy@...radead.org>,
        Souvik Kumar Chakravarty <souvik.k.chakravarty@...el.com>,
        linux-rtc@...r.kernel.org, linux-watchdog@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Sathyanarayanan Kuppuswamy Natarajan <sathyaosid@...il.com>
Subject: Re: [RFC v3 2/7] platform/x86: intel_pmc_ipc: Use MFD framework to
 create dependent devices

Hi Andy,


On 10/01/2017 07:44 AM, Andy Shevchenko wrote:
> On Tue, Sep 5, 2017 at 8:37 AM,
> <sathyanarayanan.kuppuswamy@...ux.intel.com> wrote:
>> From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
>>
>> Currently, we have lot of repetitive code in dependent device resource
>> allocation and device creation handling code. This logic can be improved if
>> we use MFD framework for dependent device creation. This patch adds this
>> support.
>>
>> +       punit_cell.id = -1;
I will remove this line in next version.
>> +       return devm_mfd_add_devices(&pdev->dev, PLATFORM_DEVID_AUTO,
>> +                       &punit_cell, 1, NULL, 0, NULL);
> IIRC you don't need to file cell ID in case of DEVID_AUTO.
I am planning to use DEVID_NONE here to match the current behavior. 
Unless you have some concerns?
>

-- 
Sathyanarayanan Kuppuswamy
Linux kernel developer