linux-kernel - Re: [PATCH v3] hisi_lpc: Use acpi_dev_for_each

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Message-ID: <050e5a2f-42b9-f851-ec6e-e2a9d3fdbe1c@huawei.com>
Date:   Tue, 5 Jul 2022 11:16:08 +0100
From:   John Garry <john.garry@...wei.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
CC:     "Rafael J. Wysocki" <rafael@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Yang Yingliang <yangyingliang@...wei.com>
Subject: Re: [PATCH v3] hisi_lpc: Use acpi_dev_for_each_child()

On 05/07/2022 10:39, Andy Shevchenko wrote:
> On Tue, Jul 5, 2022 at 11:38 AM Andy Shevchenko
> <andy.shevchenko@...il.com>  wrote:
>> On Tue, Jul 5, 2022 at 10:37 AM John Garry<john.garry@...wei.com>  wrote:
>>> On 04/07/2022 20:02, Rafael J. Wysocki wrote:
>> ...
>>
>>> I gave these a quick test on my board and they look fine.
>>>
>>> Acked-by: John Garry<john.garry@...wei.com>
>> John, I believe now you may send a formal clean up to convert to platform_device
> Hit Enter too early:-)
> 
> ...to platform_device_register_full().

Sure, I can look at that now. But I just found where we previously 
mentioned the possibility of factoring out some of the ACPI platform 
device creation code:

https://lore.kernel.org/linux-acpi/CAHp75VfOa5pN4MKT-aQmWBwPGWsOaQupyfrN-weWwfR3vMLtuA@mail.gmail.com/

There is actually still a comment in the hisi_lpc driver - I should have 
checked there first :)

So my impression is that the hisi_lpc code is almost the same in 
acpi_create_platform_device(), apart from we need do the resource fixup 
in hisi_lpc_acpi_set_io_res().

So we could factor out by dividing acpi_create_platform_device() into 2x 
parts: resource get and then platform dev create. But that does not seem 
wise as we have 2x parts which don't make sense on their own. Or else 
pass a fixup callback into acpi_create_platform_device(). Any other 
ideas if we want to go this way?

Thanks,
John