linux-kernel - Re: [PATCH] spi-nor: intel-spi: Fix Kconfig dependency to LPC

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Date:   Fri, 25 Aug 2017 14:12:58 +0200
From:   Stefan Roese <sr@...x.de>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Bin Meng <bmeng.cn@...il.com>
Cc:     Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Richard Weinberger <richard@....at>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        Brian Norris <computersforpeace@...il.com>,
        David Woodhouse <dwmw2@...radead.org>
Subject: Re: [PATCH] spi-nor: intel-spi: Fix Kconfig dependency to LPC_ICH

On 25.08.2017 12:40, Mika Westerberg wrote:
> On Fri, Aug 25, 2017 at 01:12:51AM -0700, Bin Meng wrote:
>> The Intel SPI-NOR driver is dependent on LPC_ICH to get the platform
>> data. Select it in the Kconfig.
>>
>> Signed-off-by: Bin Meng <bmeng.cn@...il.com>
>> ---
>>
>>   drivers/mtd/spi-nor/Kconfig | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/mtd/spi-nor/Kconfig b/drivers/mtd/spi-nor/Kconfig
>> index bfdfb1e..e998800 100644
>> --- a/drivers/mtd/spi-nor/Kconfig
>> +++ b/drivers/mtd/spi-nor/Kconfig
>> @@ -93,6 +93,7 @@ config SPI_INTEL_SPI_PLATFORM
>>   	tristate "Intel PCH/PCU SPI flash platform driver" if EXPERT
>>   	depends on X86
>>   	select SPI_INTEL_SPI
>> +	select LPC_ICH
> 
> How about
> 
> 	depends on X86 && LPC_ICH
> 
> instead?

I prefer Bin's version, as with your patch, the MTD SPI driver will
not be "seen" / selectable, as long as the LPC_ICH support is not
enabled. I've been hunting such dependencies myself a few times and
find them unnecessary burden.

Thanks,
Stefan