linux-kernel - Re: [PATCH v3 1/9] Input: pmic8xxx-pwrkey

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Date:	Wed, 26 Feb 2014 16:20:03 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Josh Cartwright <joshc@...eaurora.org>
CC:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 1/9] Input: pmic8xxx-pwrkey - Migrate to regmap APIs

On 02/26/14 16:13, Josh Cartwright wrote:
> On Wed, Feb 26, 2014 at 04:05:40PM -0800, Stephen Boyd wrote:
>> On 02/26/14 15:59, Josh Cartwright wrote:
>>> On Wed, Feb 26, 2014 at 11:05:54AM -0800, Stephen Boyd wrote:
>>>> Use the regmap APIs for this driver instead of custom pm8xxx
>>>> APIs. This breaks this driver's dependency on the pm8xxx APIs and
>>>> allows us to easily port it to other bus protocols in the future.
>>>>
>>>> Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
>>>> ---
>>>>  drivers/input/misc/pmic8xxx-pwrkey.c | 4 ++++
>>>>  1 file changed, 4 insertions(+)
>>>>
>>>> diff --git a/drivers/input/misc/pmic8xxx-pwrkey.c b/drivers/input/misc/pmic8xxx-pwrkey.c
>>>> index 0e1a05f95858..cf6125dc3b51 100644
>>>> --- a/drivers/input/misc/pmic8xxx-pwrkey.c
>>>> +++ b/drivers/input/misc/pmic8xxx-pwrkey.c
>>>> @@ -120,6 +120,10 @@ static int pmic8xxx_pwrkey_probe(struct platform_device *pdev)
>>>>  		return -ENOMEM;
>>>>  	}
>>>>  
>>>> +	regmap = dev_get_regmap(pdev->dev.parent, NULL);
>>>> +	if (!regmap)
>>>> +		return -ENODEV;
>>>> +
>>> This looks really weird.  A previous version of patch was included in
>>> v3.14-rc1 (1e63bd9cc4), which already included a very similar hunk...
>>>
>>> Maybe the fact that the hunk isn't identical is why a rebase didn't drop
>>> it (and instead, now if this gets merged, we'll have unnecessary
>>> duplication).
>>>
>> Ah yeah, sorry about that. This patch should just be ignored. I don't
>> think it affects anything else in the series?
> Yep, I think this can be safely ignored.
>
> However, I think it needs to be made clear that your if "Modernize pm8921
> with irqdomains, regmap, DT" lands before this patchset, this will start
> breaking randconfig builds.  It isn't clear to me how this dependency
> should be handled.
>

Hmm? If pm8921 lands before this what build breakage is there? The
pm8xxx_read/write APIs are still exposed.

-- 
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