linux-kernel - Re: [PATCH] mtd: spi-nor: winbond: add support for W25Q512NW-IQ/IN

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Date:   Wed, 13 Jul 2022 07:26:12 -0700
From:   Jae Hyun Yoo <quic_jaehyoo@...cinc.com>
To:     Michael Walle <michael@...le.cc>
CC:     <clg@...d.org>, <linux-kernel@...r.kernel.org>,
        <linux-mtd@...ts.infradead.org>, <p.yadav@...com>,
        <quic_ggregory@...cinc.com>, <quic_jiles@...cinc.com>,
        <tudor.ambarus@...rochip.com>
Subject: Re: [PATCH] mtd: spi-nor: winbond: add support for W25Q512NW-IQ/IN

Hi Michael,

On 7/11/2022 2:50 AM, Michael Walle wrote:
> Hi,
> 
>> Add support for Winbond W25Q512NW-IQ/IN
>>
>> datasheet:
>> https://www.winbond.com/resource-files/W25Q512NW%20RevB%2007192021.pdf
> 
> Please add that as a Link: tag before your SoB tag.

Sure, I'll move it using the Link: tag in v2.

>> Test result on AST2600 SoC's SPI controller:
>> $ cat /sys/bus/platform/devices/1e620000.spi/spi_master/spi0/spi0.1/spi-nor/jedec_id
>> ef6020
>>
>> $ cat /sys/bus/platform/devices/1e620000.spi/spi_master/spi0/spi0.1/spi-nor/manufacturer
>> winbond
>>
>> $ cat /sys/bus/platform/devices/1e620000.spi/spi_master/spi0/spi0.1/spi-nor/partname
>> w25q512nwq
>>
>> $ hexdump /sys/bus/platform/devices/1e620000.spi/spi_master/spi0/spi0.1/spi-nor/sfdp
>> 0000000 4653 5044 0106 ff01 0600 1001 0080 ff00
>> 0000010 0084 0201 00d0 ff00 ffff ffff ffff ffff
>> 0000020 ffff ffff ffff ffff ffff ffff ffff ffff
>> *
>> 0000080 20e5 fffb ffff 1fff eb44 6b08 3b08 bb42
>> 0000090 fffe ffff ffff 0000 ffff eb40 200c 520f
>> 00000a0 d810 0000 0233 00a6 e781 d914 63e9 3376
>> 00000b0 757a 757a bdf7 5cd5 f719 ff5d 70e9 a5f9
>> 00000c0 ffff ffff ffff ffff ffff ffff ffff ffff
>> 00000d0 0aff fff0 ff21 ffdc
>> 00000d8
> 
> This information goes below the --- line

I followed the commit 89051ff5dd3bfbdc95c315dc3377fc46dadddc7c but yes,
I'll move this information into the comment section.

>> Signed-off-by: Jae Hyun Yoo <quic_jaehyoo@...cinc.com>
>> ---
>>   drivers/mtd/spi-nor/winbond.c | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
>> index ffaa24055259..d6f1a3b7267e 100644
>> --- a/drivers/mtd/spi-nor/winbond.c
>> +++ b/drivers/mtd/spi-nor/winbond.c
>> @@ -133,6 +133,9 @@ static const struct flash_info winbond_nor_parts[] = {
>>   	{ "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024)
>>   		NO_SFDP_FLAGS(SECT_4K | SPI_NOR_QUAD_READ |
>>   			      SPI_NOR_DUAL_READ) },
>> +	{ "w25q512nwq", INFO(0xef6020, 0, 64 * 1024, 1024)
> 
> Please use INFO(0xef6020, 0, 0, 0) and test wether it will still
> work correctly. We will then be able to convert it to SNOR_ID3()
> later.

Tested it but it doesn't work with INFO(0xef6020, 0, 0, 0). I'll keep
it as is.

>> +		PARSE_SFDP
>> +		OTP_INFO(256, 3, 0x1000, 0x1000) },
> 
> Did you test OTP?

Yes.

$ flash_otp_info -u /dev/mtd0
Number of OTP user blocks on /dev/mtd0: 3
block  0:  offset = 0x0000  size = 256 bytes  [unlocked]
block  1:  offset = 0x0100  size = 256 bytes  [unlocked]
block  2:  offset = 0x0200  size = 256 bytes  [unlocked]
$ flash_otp_dump -u /dev/mtd0 0x2d0
OTP user data for /dev/mtd0
0x02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
$ echo -n otp test | flash_otp_write -u /dev/mtd0 0x2d0
Writing OTP user data on /dev/mtd0 at offset 0x2d0
Wrote 8 bytes of OTP user data
$ flash_otp_dump -u /dev/mtd0 0x2d0
OTP user data for /dev/mtd0
0x02d0: 6f 74 70 20 74 65 73 74 ff ff ff ff ff ff ff ff
0x02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
$ flash_otp_erase -u /dev/mtd0 0x200 0x100
$ flash_otp_dump -u /dev/mtd0 0x2d0
OTP user data for /dev/mtd0
0x02d0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x02e0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
0x02f0: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff

I'll add it to commit comment section too.

Thanks,

Jae

> -michael
> 
>>   	{ "w25q512nwm", INFO(0xef8020, 0, 64 * 1024, 1024)
>>   		PARSE_SFDP
>>   		OTP_INFO(256, 3, 0x1000, 0x1000) },
>> -- 
>> 2.25.1
>