linux-kernel - Re: [PATCH v2] usb: typec: mux: select not-visible INTEL_SCU

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Message-ID: <bc370384-f852-eedf-5bd8-ed39bf671aba@infradead.org>
Date:   Mon, 31 Jan 2022 08:26:36 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Lee Jones <lee.jones@...aro.org>, linux-usb@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2] usb: typec: mux: select not-visible INTEL_SCU_IPC



On 1/31/22 00:42, Heikki Krogerus wrote:
> On Sun, Jan 30, 2022 at 10:50:32AM -0800, Randy Dunlap wrote:
>> Use "select INTEL_SCU_IPC" instead of depending on it since it is
>> not a visible Kconfig symbol and it may not otherwise be set/enabled.
>>
>> Fixes: b62851491a55 ("usb: typec: mux: Convert the Intel PMC Mux driver to use new SCU IPC API")
>> Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
>> Cc: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
>> Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>
>> Cc: Lee Jones <lee.jones@...aro.org>
>> Cc: linux-usb@...r.kernel.org
>> Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>> Cc: kernel test robot <lkp@...el.com>
>> ---
>> v2: add dependency on X86_PLATFORM_DEVICES to fix build error that was
>>     Reported_by: kernel test robot <lkp@...el.com>
>>
>>  drivers/usb/typec/mux/Kconfig |    4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> --- linux-next-20220128.orig/drivers/usb/typec/mux/Kconfig
>> +++ linux-next-20220128/drivers/usb/typec/mux/Kconfig
>> @@ -11,8 +11,8 @@ config TYPEC_MUX_PI3USB30532
>>  
>>  config TYPEC_MUX_INTEL_PMC
>>  	tristate "Intel PMC mux control"
>> -	depends on ACPI
>> -	depends on INTEL_SCU_IPC
>> +	depends on ACPI && X86_PLATFORM_DEVICES
>> +	select INTEL_SCU_IPC
>>  	select USB_ROLE_SWITCH
>>  	help
>>  	  Driver for USB muxes controlled by Intel PMC FW. Intel PMC FW can
> 
> This will cause the driver to fail at probe time if there are no SCU
> device drivers enabled.
> 
> The idea is that the SCU device drivers select the SCU IPC library,
> not the users of the library like this mux driver.

OK. Thanks.

-- 
~Randy