linux-kernel - Re: [PATCH v5 19/23] mtd: nand: denali: fix raw and oob accessors for syndrome page layout

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Message-ID: <20170607160935.6b064eef@bbrezillon>
Date:   Wed, 7 Jun 2017 16:09:35 +0200
From:   Boris Brezillon <boris.brezillon@...e-electrons.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-mtd@...ts.infradead.org, Enrico Jorns <ejo@...gutronix.de>,
        Artem Bityutskiy <artem.bityutskiy@...ux.intel.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Marek Vasut <marek.vasut@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Chuanxiao Dong <chuanxiao.dong@...el.com>,
        Jassi Brar <jaswinder.singh@...aro.org>,
        Cyrille Pitchen <cyrille.pitchen@...ev4u.fr>,
        linux-kernel@...r.kernel.org,
        Brian Norris <computersforpeace@...il.com>,
        Richard Weinberger <richard@....at>
Subject: Re: [PATCH v5 19/23] mtd: nand: denali: fix raw and oob accessors
 for syndrome page layout

On Wed,  7 Jun 2017 20:52:28 +0900
Masahiro Yamada <yamada.masahiro@...ionext.com> wrote:

>  
> +static void denali_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
> +{
> +	struct denali_nand_info *denali = mtd_to_denali(mtd);
> +	int i;
> +
> +	iowrite32(MODE_11 | BANK(denali->flash_bank) | 2, denali->flash_mem);

What is this '| 2'? You seem to use it a lot. Can you define a macro
and maybe add a comment if the macro name is not self-descriptive.