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Message-ID: <8a6f24eb-a256-3d0e-5a2c-f62b4afd30aa@kernel.org>
Date:   Sat, 19 Feb 2022 21:11:48 +0200
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Subject: Re: [PATCH] mtd: rawnand: omap2: Prevent invalid configuration and
 build error
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To:     Guenter Roeck <linux@roeck-us.net>
Cc:     miquel.raynal@bootlin.com, krzysztof.kozlowski@canonical.com,
        vigneshr@ti.com, nm@ti.com, linux-mtd@lists.infradead.org,
        linux-kernel@vger.kernel.org
References: <20220118123525.8020-1-rogerq@kernel.org>
 <20220219150836.GA1035394@roeck-us.net>
From:   Roger Quadros <rogerq@kernel.org>
In-Reply-To: <20220219150836.GA1035394@roeck-us.net>
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Hi,

On 19/02/2022 17:08, Guenter Roeck wrote:
> On Tue, Jan 18, 2022 at 02:35:25PM +0200, Roger Quadros wrote:
>> We need to select MEMORY as well otherwise OMAP_GPMC will not be built.
>> For simplicity let's select MEMORY and OMAP_GPMC unconditionally as
>> this driver depends on OMAP_GPMC driver and uses symbols from there.
>>
>> Fixes: dbcb124acebd ("mtd: rawnand: omap2: Select GPMC device driver for ARCH_K3")
>> Reported-by: kernel test robot <lkp@intel.com>
>> Signed-off-by: Roger Quadros <rogerq@kernel.org>
> 
> This patch ignores OMAP_GPMC dependencies and results in:
> 
> WARNING: unmet direct dependencies detected for OMAP_GPMC
>   Depends on [n]: MEMORY [=y] && OF_ADDRESS [=n]
>   Selected by [m]:
>   - MTD_NAND_OMAP2 [=m] && MTD [=m] && MTD_RAW_NAND [=m] && (ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST [=y]) && HAS_IOMEM [=y]
> 
> when configuring sparc64:allmodconfig, and in the following
> build failure when trying to build that image.
> 
> Building sparc64:allmodconfig ... failed
> --------------
> Error log:
> <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
> sparc64-linux-ld: drivers/memory/omap-gpmc.o: in function `gpmc_probe_generic_child':
> omap-gpmc.c:(.text.unlikely+0x14c4): undefined reference to `of_platform_device_create'
> 
> Guenter
> 
>> ---
>>  drivers/mtd/nand/raw/Kconfig | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/mtd/nand/raw/Kconfig b/drivers/mtd/nand/raw/Kconfig
>> index 20408b7db540..d986ab4e4c35 100644
>> --- a/drivers/mtd/nand/raw/Kconfig
>> +++ b/drivers/mtd/nand/raw/Kconfig
>> @@ -42,7 +42,8 @@ config MTD_NAND_OMAP2
>>  	tristate "OMAP2, OMAP3, OMAP4 and Keystone NAND controller"
>>  	depends on ARCH_OMAP2PLUS || ARCH_KEYSTONE || ARCH_K3 || COMPILE_TEST
>>  	depends on HAS_IOMEM
>> -	select OMAP_GPMC if ARCH_K3
>> +	select MEMORY
>> +	select OMAP_GPMC

I think selecting these was a bad idea in the first place. I'll send out a patch to remove the selects.
This driver should depend on them instead.

We will figure out how to enable OMAP_GPMC for K3 architecture some other way.

>>  	help
>>  	  Support for NAND flash on Texas Instruments OMAP2, OMAP3, OMAP4
>>  	  and Keystone platforms.
>> -- 
>> 2.17.1
>>

cheers,
-roger