linux-kernel - Re: [PATCH] mtd: denali: Disable sub-page writes in Denali NAND driver

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Date:	Tue, 3 Feb 2015 23:23:35 +0100
From:	Richard Weinberger <richard.weinberger@...il.com>
To:	Dinh Nguyen <dinh.linux@...il.com>
Cc:	Dinh Nguyen <dinguyen@...nsource.altera.com>,
	Brian Norris <computersforpeace@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	yamada.m@...panasonic.com, Josh Triplett <josh@...htriplett.org>,
	"linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
	Linux List <linux-kernel@...r.kernel.org>,
	Graham Moore <grmoore@...nsource.altera.com>
Subject: Re: [PATCH] mtd: denali: Disable sub-page writes in Denali NAND driver

On Tue, Feb 3, 2015 at 11:15 PM, Dinh Nguyen <dinh.linux@...il.com> wrote:
> Hi Brian,
>
> On Wed, Jan 14, 2015 at 9:38 AM,  <dinguyen@...nsource.altera.com> wrote:
>> From: Graham Moore <grmoore@...nsource.altera.com>
>>
>> The Denali Controller IP does not support sub-page writes.
>>
>> Signed-off-by: Graham Moore <grmoore@...nsource.altera.com>
>> Signed-off-by: Dinh Nguyen <dinguyen@...nsource.altera.com>
>> ---
>>  drivers/mtd/nand/denali.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
>> index b3b7ca1..b16b040 100644
>> --- a/drivers/mtd/nand/denali.c
>> +++ b/drivers/mtd/nand/denali.c
>> @@ -1565,6 +1565,9 @@ int denali_init(struct denali_nand_info *denali)
>>         denali->nand.options |= NAND_SKIP_BBTSCAN;
>>         denali->nand.ecc.mode = NAND_ECC_HW_SYNDROME;
>>
>> +       /* no subpage writes on denali */
>> +       denali->nand.options |= NAND_NO_SUBPAGE_WRITE;
>> +
>>         /*
>>          * Denali Controller only support 15bit and 8bit ECC in MRST,
>>          * so just let controller do 15bit ECC for MLC and 8bit ECC for
>> --
>> 2.2.1
>>
>
> Was wondering if you got a chance to look at this patch?

So this driver never worked?
If it worked for some users we have to make sure that your change does not break
existing setups.
/me thinks of UBI.

-- 
Thanks,
//richard
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