linux-kernel - Re: [PATCH] mtd: rawnand: ingenic: fix ingenic

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Message-ID: <CAK8P3a28NrvLP1nE7TQUCqwYXVwrSnVUJoH0yTSqRpz93f4g2Q@mail.gmail.com>
Date:   Mon, 17 Jun 2019 14:12:48 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Paul Cercueil <paul@...pouillou.net>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Brian Norris <computersforpeace@...il.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mtd: rawnand: ingenic: fix ingenic_ecc dependency

On Mon, Jun 17, 2019 at 1:24 PM Paul Cercueil <paul@...pouillou.net> wrote:

> I think there's a better way to fix it, only in Kconfig.
>
> * Add a bool symbol MTD_NAND_INGENIC_USE_HW_ECC
> * Have the three ECC/BCH drivers select this symbol instead of
>   MTD_NAND_INGENIC_ECC
> * Add the following to the MTD_NAND_JZ4780 config option:
>   "select MTD_NAND_INGENIC_ECC if MTD_NAND_INGENIC_USE_HW_ECC"

I don't see much difference to my approach here, but if you want
to submit that version with 'Reported-by: Arnd Bergmann <arnd@...db.de>',
please do so.

Yet another option would be to use Makefile code to link both
files into one module, and remove the EXPORT_SYMBOL statements:

obj-$(CONFIG_MTD_NAND_JZ4780) += jz4780_nand.o
jz4780_nand-y += ingenic_nand.o
jz4780_nand-$(CONFIG_MTD_NAND_INGENIC_ECC) += ingenic_ecc.o

        Arnd