linux-kernel - Re: [PATCH 2/5] mtd: nand: drop unnecessary partition parser data

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Date:	Tue, 27 Oct 2015 08:52:53 +0100
From:	Boris Brezillon <boris.brezillon@...e-electrons.com>
To:	Brian Norris <computersforpeace@...il.com>
Cc:	<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Marek Vasut <marex@...x.de>,
	Scott Wood <scottwood@...escale.com>,
	Josh Wu <josh.wu@...el.com>,
	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Han Xu <han.xu@...escale.com>,
	Huang Shijie <shijie.huang@....com>
Subject: Re: [PATCH 2/5] mtd: nand: drop unnecessary partition parser data

On Mon, 26 Oct 2015 19:31:07 -0700
Brian Norris <computersforpeace@...il.com> wrote:

> All of these drivers set up a parser data struct just to communicate DT
> partition data. This field has been deprecated and is instead supported
> by telling nand_scan_ident() about the 'flash_node'.
> 
> This patch:
>  * sets chip->flash_node for those drivers that didn't already (but used
>    OF partitioning)

As mentioned in patch 1, I think we should get rid of the ->flash_node
field and directly set mtd->dev.of_node instead. If we want to hide
MTD internals we could provide this kind of helper:

static inline void mtd_set_of_node(struct mtd_device *mtd,
				   struct device_node *np)
{
	mtd->dev.of_node = np;
}

>  * drops the parser data
>  * switches to the simpler mtd_device_register() where possible, now
>    that we've eliminated one of the auxiliary parameters
> 
> Now that we've assigned chip->flash_node for these drivers, we can
> probably rely on nand_dt_init() to do more of the DT parsing for us, but
> for now, I don't want to fiddle with each of these drivers. The parsing
> is done in duplicate for now on some drivers. I don't think this should
> break things. (Famous last words.)
> 
> Signed-off-by: Brian Norris <computersforpeace@...il.com>

For the sunxi_nand driver

Acked-by: Boris Brezillon <boris.brezillon@...e-electrons.com>

Thanks,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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