linux-kernel - Re: [PATCH] platform/x86: x86-android-tablets: select PMIC_OPREGION to resolve a link error of intel_soc_pmic_exec_mipi_pmic_seq

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Date:   Sat, 11 Mar 2023 12:12:30 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     Tom Rix <trix@...hat.com>, markgross@...nel.org
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: x86-android-tablets: select PMIC_OPREGION
 to resolve a link error of intel_soc_pmic_exec_mipi_pmic_seq_element

Hi,

On 3/10/23 20:29, Tom Rix wrote:
> A rand config causes this link error
> drivers/platform/x86/x86-android-tablets/lenovo.o: In function `lenovo_yt3_init':
> lenovo.c:(.init.text+0x6c): undefined reference to `intel_soc_pmic_exec_mipi_pmic_seq_element'
> 
> The rand config has
> CONFIG_X86_ANDROID_TABLETS=y
> CONFIG_PMIC_OPREGION=n
> 
> PMIC_OPREGION should be selected to build the
> intel_soc_pmic_exec_mipi_pmic_seq_element symbol.
> 
> Signed-off-by: Tom Rix <trix@...hat.com>

Thanks, but this is a dup with:

https://patchwork.kernel.org/project/platform-driver-x86/patch/20230309094035.18736-1-hdegoede@redhat.com/

I just did not get around to pushing that out to pdx86/for-next yet.
I have just pushed this to pdx86/for-next to avoid further duplicate fixes.

FWIW, since all other users of PMIC_OPREGION use depends on, not select this
should have been a depends on too. Unless Kconfig symbols are explicitly
intended to be selected (typically these are hidden Kconfig symbols (1))
then you should usually use depends on. Mixing depends on and select leads
to Kconfig circular dependencies errors.

Regards,

Hans


1) A hidden Kconfig symbol is one which is e.g. just 'bool' not
'bool "Description of feature here"' these typically are libraries /

helpers.




> ---
>  drivers/platform/x86/x86-android-tablets/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/platform/x86/x86-android-tablets/Kconfig b/drivers/platform/x86/x86-android-tablets/Kconfig
> index 2b3daca5380b..65980229d783 100644
> --- a/drivers/platform/x86/x86-android-tablets/Kconfig
> +++ b/drivers/platform/x86/x86-android-tablets/Kconfig
> @@ -6,6 +6,7 @@
>  config X86_ANDROID_TABLETS
>  	tristate "X86 Android tablet support"
>  	depends on I2C && SPI && SERIAL_DEV_BUS && ACPI && EFI && GPIOLIB
> +	select PMIC_OPREGION
>  	help
>  	  X86 tablets which ship with Android as (part of) the factory image
>  	  typically have various problems with their DSDTs. The factory kernels