linux-kernel - Re: [PATCH v4 1/2] mfd: intel_soc_pmic: Select designware i2c-bus driver

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Date:   Fri, 26 May 2017 13:11:53 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     linux-kernel@...r.kernel.org,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v4 1/2] mfd: intel_soc_pmic: Select designware i2c-bus
 driver

Hi,

On 22-05-17 12:57, Lee Jones wrote:
> On Mon, 15 May 2017, 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.
>>
>> This fixes errors like these during boot:
>>
>> mmc0: SDHCI controller on ACPI [80860F14:00] using ADMA
>> ACPI Error: No handler for Region [REGS] (ffff93543b0cc3a8) [UserDefinedRegion] (20170119/evregion-166)
>> ACPI Error: Region UserDefinedRegion (ID=143) has no handler (20170119/exfldio-299)
>> ACPI Error: Method parse/execution failed [\_SB.PCI0.I2C7.PMI5.GET] (Node ffff93543b0cde10), AE_NOT_EXIST (20170119/psparse-543)
>> ACPI Error: Method parse/execution failed [\_SB.PCI0.SHC1._PS0] (Node ffff93543b0b5cd0), AE_NOT_EXIST (20170119/psparse-543)
>> acpi 80860F14:02: Failed to change power state to D0
>>
>> 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.
>>
>> Cc: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
>> Signed-off-by: Hans de Goede <hdegoede@...hat.com>
> 
> Would be good to get an Ack by the users/maintainers of this driver.
> 
>> ---
>> Note this patch will partially conflicts with (contains the same changes as)
>> a patch in Andy Shevchenko's tree.
> 
> Has this been sorted now?

Yes, sorry I should have dropped this bit.

> 
>> ---
>> Changes in v2:
>> -Fix Kconfig depends and selects to fix warning reported by kbuild test robot
>> -Improve commit msg (add example of ACPI errors this avoids)
>> Changes in v3:
>> -No changes
>> Changes in v4:
>> -Add explanation why this is a bool and why it selects i2c-designwaree
>>   to the help text rather then as comments in the Kconfig
>> ---
>>   drivers/mfd/Kconfig | 11 +++++++++--
>>   1 file changed, 9 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
>> index 1b6a83a4a114..61ebda81e134 100644
>> --- a/drivers/mfd/Kconfig
>> +++ b/drivers/mfd/Kconfig
>> @@ -448,17 +448,24 @@ config LPC_SCH
>>   
>>   config INTEL_SOC_PMIC
>>   	bool "Support for Crystal Cove PMIC"
>> -	depends on GPIOLIB
>> -	depends on I2C=y
>> +	depends on HAS_IOMEM
>> +	select GPIOLIB
>> +	select I2C
>>   	select MFD_CORE
>>   	select REGMAP_I2C
>>   	select REGMAP_IRQ
>> +	select COMMON_CLK
>> +	select I2C_DESIGNWARE_PLATFORM
>>   	help
>>   	  Select this option to enable support for Crystal Cove PMIC
>>   	  on some Intel SoC systems. The PMIC provides ADC, GPIO,
>>   	  thermal, charger and related power management functions
>>   	  on these systems.
>>   
>> +	  This option is a bool as it provides an ACPI Opregion which must be
> 
> Nit: s/Opregion/OpRegion/

Fixed for v5 (which I will send in a minute).

Regards,

Hans