linux-kernel - Re: [PATCH 2/5] mfd: intel_soc_pmic: Select designware i2c-bus driver

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Message-ID: <16efec42-64cf-88e8-8ebb-cf9fdfc383c3@redhat.com>
Date:   Thu, 23 Mar 2017 23:31:31 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Lee Jones <lee.jones@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] mfd: intel_soc_pmic: Select designware i2c-bus driver

Hi,

On 23-03-17 17:46, Lee Jones wrote:
> On Wed, 22 Mar 2017, Andy Shevchenko wrote:
>
>> On Wed, 2017-03-22 at 12:29 +0100, Hans de Goede wrote:
>>> The Crystal Cove PMIC provides an ACPI OPRegion handler, which must be
>>> available before other drivers using it are loaded, which is why
>>> INTEL_SOC_PMIC is a bool.
>>>
>>> Just having the driver is not enough, the driver for the i2c-bus must
>>> also be built in, to ensure this, this patch adds a select for it.
>>>
>>
>>> While at it this patch also changes the human readable name of the
>>> Kconfig
>>> option to make clear the INTEL_SOC_PMIC option selects support for the
>>> Intel Crystal Cove PMIC and documents why this is a bool.
>>
>> The above is what my patch does, I'm okay if the change is going with
>> this series as long as Lee is on the same side. Otherwise I would prefer
>> to go my changes first.
>
> I think this set is going to need to be rebase on top of MFD.

This patch (2/5) and 3/5 should apply cleanly as they only
touch drivers/mfd/Kconfig and mfd-for-next has only 1 commit
touching Kconfig which is no where near the areas these 2
patches are making changes. So I believe they can be applied as is.

As for the other patches, patch 1/5 is for the ACPI subsys, since
you've requested changes to the Cherry Trail Whiskey Cove MFD driver
I will squash 4/5 into the new version of that and 5/5 again is an
ACPI patch.

Regards,

Hans



>
>>> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>>> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
>>> ---
>>> Note this patch will partially conflicts with (contains the same
>>> changes as)
>>> a patch in Andy Shevchenko's tree.
>>> ---
>>>  drivers/mfd/Kconfig | 7 +++++--
>>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>>> index d427a10..0c6a967 100644
>>> --- a/drivers/mfd/Kconfig
>>> +++ b/drivers/mfd/Kconfig
>>> @@ -425,14 +425,17 @@ config LPC_SCH
>>>  	  System Management Bus and General Purpose I/O.
>>>
>>>  config INTEL_SOC_PMIC
>>> -	bool "Support for Intel Atom SoC PMIC"
>>> +	# This is a bool as it provides an ACPI Opregion which must
>>> be
>>> +	# available as soon as possible
>>> +	bool "Support for Intel Crystal Cove PMIC"
>>>  	depends on GPIOLIB
>>>  	depends on I2C=y
>>>  	select MFD_CORE
>>>  	select REGMAP_I2C
>>>  	select REGMAP_IRQ
>>> +	select I2C_DESIGNWARE_PLATFORM
>>>  	help
>>> -	  Select this option to enable support for the PMIC device
>>> +	  Select this option to enable support for the Crystal Cove
>>> PMIC
>>>  	  on some Intel SoC systems. The PMIC provides ADC, GPIO,
>>>  	  thermal, charger and related power management functions
>>>  	  on these systems.
>>
>