linux-kernel - Re: [PATCH] mtd: onenand: omap2: add dependency on GPMC

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Message-ID: <eef60a26-ef23-1b79-22f7-adaee3be9360@kernel.org>
Date:   Mon, 7 Nov 2022 10:44:56 +0200
From:   Roger Quadros <rogerq@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     kernel test robot <lkp@...el.com>
Subject: Re: [PATCH] mtd: onenand: omap2: add dependency on GPMC

Hello Krzysztof,

On 04/11/2022 21:49, Krzysztof Kozlowski wrote:
> OMAP2 OneNAND driver uses gpmc_omap_onenand_set_timings() provided by
> OMAP GPMC driver, so the latter cannot be module if OneNAND driver is
> built-in:
> 
>   /usr/bin/arm-linux-gnueabi-ld: drivers/mtd/nand/onenand/onenand_omap2.o: in function `omap2_onenand_probe':
>   onenand_omap2.c:(.text+0x520): undefined reference to `gpmc_omap_onenand_set_timings'
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Fixes: 854fd9209b20 ("memory: omap-gpmc: Allow building as a module")
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
>  drivers/mtd/nand/onenand/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mtd/nand/onenand/Kconfig b/drivers/mtd/nand/onenand/Kconfig
> index 34d9a7a82ad4..fa94c514626d 100644
> --- a/drivers/mtd/nand/onenand/Kconfig
> +++ b/drivers/mtd/nand/onenand/Kconfig
> @@ -26,6 +26,7 @@ config MTD_ONENAND_OMAP2
>  	tristate "OneNAND on OMAP2/OMAP3 support"
>  	depends on ARCH_OMAP2 || ARCH_OMAP3 || (COMPILE_TEST && ARM)
>  	depends on OF || COMPILE_TEST
> +	depends on OMAP_GPMC || !OMAP_GPMC

Why did you add !OMAP_GPMC?

If OMAP_GPMC is not set we don't want to be able to build this driver correct?

>  	help
>  	  Support for a OneNAND flash device connected to an OMAP2/OMAP3 SoC
>  	  via the GPMC memory controller.

cheers,
-roger