linux-kernel - Re: [PATCH v5 07/12] mtd: nand: add Samsung K9GBG08U0A-M to nand

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Date:	Sat, 16 May 2015 15:57:00 -0300
From:	Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:	Antoine Tenart <antoine.tenart@...e-electrons.com>,
	sebastian.hesselbarth@...il.com, dwmw2@...radead.org,
	computersforpeace@...il.com
CC:	boris.brezillon@...e-electrons.com, zmxu@...vell.com,
	jszhang@...vell.com, linux-arm-kernel@...ts.infradead.org,
	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 07/12] mtd: nand: add Samsung K9GBG08U0A-M to nand_ids
 table

Sorry for the huge delay.

On 05/11/2015 11:58 AM, Antoine Tenart wrote:
> Add the full description of the Samsung K9GBG08U0A-M nand chip in the
> nand_ids table.
> 
> Signed-off-by: Antoine Tenart <antoine.tenart@...e-electrons.com>
> ---
>  drivers/mtd/nand/nand_ids.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
> index dd620c19c619..500c33e1db06 100644
> --- a/drivers/mtd/nand/nand_ids.c
> +++ b/drivers/mtd/nand/nand_ids.c
> @@ -50,6 +50,10 @@ struct nand_flash_dev nand_flash_ids[] = {
>  		{ .id = {0xad, 0xde, 0x94, 0xda, 0x74, 0xc4} },
>  		  SZ_8K, SZ_8K, SZ_2M, 0, 6, 640, NAND_ECC_INFO(40, SZ_1K),
>  		  4 },
> +	{"NAND 4GiB 3,3V 8-bit",
> +		{ .id = {0xec, 0xd7, 0x94, 0x76, 0x64, 0x43}, },
> +		  8192, 4096, SZ_1M, LP_OPTIONS, 0, 0, NAND_ECC_INFO(40, SZ_1K),

You should stick to SZ_8K and SZ_4K here.

> +		  4 },
>  
>  	LEGACY_ID_NAND("NAND 4MiB 5V 8-bit",   0x6B, 4, SZ_8K, SP_OPTIONS),
>  	LEGACY_ID_NAND("NAND 4MiB 3,3V 8-bit", 0xE3, 4, SZ_8K, SP_OPTIONS),
> 

I found a datasheet here for K9GBG08U0A that claims to support JEDEC
device identification (i.e. 0x90 0x40 and 0xEC 0x40 commands). Have you
tested it? Any reason you are adding full ID instead?

How about you separate this patch from this series (so we can discuss
and apply it separatedly)?

Thanks,
-- 
Ezequiel Garcia, VanguardiaSur
www.vanguardiasur.com.ar
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