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SubjectRe: [PATCH] mtd: spi-nor: add support for sst26wf016, sst26wf032 memory
Date
Hi, Eugeniy,

On 06/07/2019 06:43 PM, Eugeniy Paltsev wrote:
> External E-Mail
>
>
> This commit adds support for the SST sst26wf016 and sst26wf032
> flash memory IC.

Please specify if you tested both flashes, with 1-1-1, 1-1-2 and 1-1-4 reads.
Let us know which controller you used. I ask for these to be sure that we don't
add flashes that are broken from day one.

>
> Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
> ---
> drivers/mtd/spi-nor/spi-nor.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
> index 73172d7f512b..224275461a2c 100644
> --- a/drivers/mtd/spi-nor/spi-nor.c
> +++ b/drivers/mtd/spi-nor/spi-nor.c
> @@ -1945,6 +1945,8 @@ static const struct flash_info spi_nor_ids[] = {
> { "sst25wf040b", INFO(0x621613, 0, 64 * 1024, 8, SECT_4K) },
> { "sst25wf040", INFO(0xbf2504, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) },
> { "sst25wf080", INFO(0xbf2505, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
> + { "sst26wf016", INFO(0xbf2651, 0, 64 * 1024, 32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },

I confirm that the above is correct.

> + { "sst26wf032", INFO(0xbf2622, 0, 64 * 1024, 64, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },

There are sst26wf032 flashes that don't support SPINOR_OP_READ_1_1_2 (0x3b) and
SPINOR_OP_READ_1_1_4 (0x6b), check
https://pdf1.alldatasheet.com/datasheet-pdf/view/392063/SST/SST26WF032.html. You
can't add SPI_NOR_DUAL_READ and SPI_NOR_QUAD_READ if 0x3b and 0x6b commands are
not supported. Check spi_nor_init_params().

Cheers,
ta
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