linux-kernel - Re: [PATCH v2 1/3] kconfig: add dependencies of POWER

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Message-ID: <54da2376-dc65-0a96-55df-7a5acfbb9bff@csgroup.eu>
Date:   Mon, 4 Sep 2023 10:58:51 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Philippe Mathieu-Daudé <philmd@...aro.org>,
        Yuan Tan <tanyuan@...ylab.org>,
        "mpe@...erman.id.au" <mpe@...erman.id.au>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "tsbogend@...ha.franken.de" <tsbogend@...ha.franken.de>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>
CC:     "linux@...ssschuh.net" <linux@...ssschuh.net>,
        "w@....eu" <w@....eu>, "falcon@...ylab.org" <falcon@...ylab.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 1/3] kconfig: add dependencies of POWER_RESET for mips
 malta



Le 04/09/2023 à 12:51, Philippe Mathieu-Daudé a écrit :
> On 4/9/23 11:24, Yuan Tan wrote:
>> Hi,
>>
>> On 9/4/2023 3:40 PM, Philippe Mathieu-Daudé wrote:
>>> Hi,
>>>
>>> On 1/9/23 04:42, Yuan Tan wrote:
>>>> MIPS Malta's power off depends on PCI, PCI_QUIRKS, and
>>>> POWER_RESET_PIIX4_POWEROFF to work. Enable them when POWER_RESET is set
>>>> for convenience.
>>>>
>>>> Suggested-by: Zhangjin Wu <falcon@...ylab.org>
>>>> Signed-off-by: Yuan Tan <tanyuan@...ylab.org>
>>>> ---
>>>>   arch/mips/Kconfig | 3 +++
>>>>   1 file changed, 3 insertions(+)
>>>>
>>>> diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
>>>> index bc8421859006..13bacbd05125 100644
>>>> --- a/arch/mips/Kconfig
>>>> +++ b/arch/mips/Kconfig
>>>> @@ -547,6 +547,9 @@ config MIPS_MALTA
>>>>       select MIPS_L1_CACHE_SHIFT_6
>>>>       select MIPS_MSC
>>>>       select PCI_GT64XXX_PCI0
>>>> +    select PCI if POWER_RESET
>>>> +    select PCI_QUIRKS if POWER_RESET
>>>> +    select POWER_RESET_PIIX4_POWEROFF if POWER_RESET
>>>>       select SMP_UP if SMP
>>>>       select SWAP_IO_SPACE
>>>>       select SYS_HAS_CPU_MIPS32_R1
>>>
>>> Shouldn't we also update the _defconfig files?
>>>
>> Sorry, in my last email, I forgot to reply to all. So I am now 
>> resending this email.
>>
>> In malta_defconfig, PCI and POWER_RESET_PIIX4_POWEROFF have already 
>> been set and PCI_QUIRKS is also selected by FSL_PCI [=n].
>>
>> So shutdown and reboot with malta_defconfig is working and there is no 
>> need to update the malta_defconfig 🙂
> 
> Since the dependency is now enforced by Kconfig, the defconfig can
> be simplified:
> 
> --- a/arch/mips/configs/malta_defconfig
> +++ b/arch/mips/configs/malta_defconfig
> @@ -306,3 +306,2 @@ CONFIG_SERIAL_8250_CONSOLE=y
>   CONFIG_POWER_RESET=y
> -CONFIG_POWER_RESET_PIIX4_POWEROFF=y
>   CONFIG_POWER_RESET_SYSCON=y
> 
> But maybe we don't care, I don't know.

I understand from what you say that you update malta_defconfig manually ?

defconfigs shouldn't be updated manually.

Once you have the new .config you should use "make savedefconfig" then 
replace your file by the newly generated defconfig file.

Christophe