From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Fri, 3 Apr 2015 15:36:43 -0500
Subject: [U-Boot] [PATCH 4/4] mtd: vf610_nfc: support subpage write
In-Reply-To: <1428086445-10554-4-git-send-email-stefan@agner.ch>
References: <1428086445-10554-1-git-send-email-stefan@agner.ch>
 <1428086445-10554-4-git-send-email-stefan@agner.ch>
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On Fri, 2015-04-03 at 20:40 +0200, Stefan Agner wrote:
> Support subpage writes using a custom implementation of write_subpage.
> The driver loads the page into SRAM buffer using NAND_CMD_READ0, when
> the framework requests the NAND_CMD_SEQIN command. Then, the buffer is
> updated by the custom write_subpage implementation. Upon write, the
> controller calculates the hardware ECC across the whole page before
> programming the page.
> 
> This method saves transferring the whole page over the bus to the NFC
> IP, which would happen when using NAND_NO_SUBPAGE_WRITE.
> 
> Signed-off-by: Stefan Agner <stefan@agner.ch>

As previously discussed, please explain why subpage writes make sense
with this controller.

-Scott