Re: [PATCH v3 1/2] mtd: spi-nor: add support to non-uniform SFDP SPI NOR flash memories

Boris Brezillon
2018-10-22T10:46:27Z

On Mon, 22 Oct 2018 10:39:48 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

>
> [ 1.632190] Start [addr_width:00000000, read_dumy:08, read_opcode:00000000]
> [ 1.639148] spi_nor_get_map_in_use:2882 smpt[0]=08ff65fc
> [ 1.644451] spi_nor_get_map_in_use:2882 smpt[1]=00000004
> [ 1.649755] spi_nor_get_map_in_use:2882 smpt[2]=04ff65fc
> [ 1.655057] spi_nor_get_map_in_use:2882 smpt[3]=00000002
> [ 1.660360] spi_nor_get_map_in_use:2882 smpt[4]=02ff65fd
> [ 1.665662] spi_nor_get_map_in_use:2882 smpt[5]=00000004
> [ 1.670965] spi_nor_get_map_in_use:2882 smpt[6]=ff0201fe
> [ 1.676267] spi_nor_get_map_in_use:2882 smpt[7]=00007ff1
> [ 1.681571] spi_nor_get_map_in_use:2882 smpt[8]=00037ff4
> [ 1.686874] spi_nor_get_map_in_use:2882 smpt[9]=03fbfff4
> [ 1.692176] spi_nor_get_map_in_use:2882 smpt[10]=ff0203fe
> [ 1.697566] spi_nor_get_map_in_use:2882 smpt[11]=03fbfff4
> [ 1.702954] spi_nor_get_map_in_use:2882 smpt[12]=00037ff4
> [ 1.708343] spi_nor_get_map_in_use:2882 smpt[13]=00007ff1
> [ 1.713732] spi_nor_get_map_in_use:2882 smpt[14]=ff0005ff
> [ 1.719120] spi_nor_get_map_in_use:2882 smpt[15]=03fffff4
> [ 1.724509] smpt[0]=[addr_width:00000000, read_dumy:08, read_opcode:00000065]
> [ 1.731650] smpt[1]=[addr_width:00000000, read_dumy:08, read_opcode:00000000]
> [ 1.738791] smpt[2]=[addr_width:00000000, read_dumy:08, read_opcode:00000065]

You still don't print read_dummy correctly: %0x8 -> %08x.

Can you add

if (!nor->addr_width)
nor->addr_width = 3;

After the

nor->addr_width = spi_nor_smpt_addr_width(nor, smpt[i]);

line.

> [ 1.745932] spi_nor_get_map_in_use:2911 map_id=0 smpt_len:16 i=:3
> [ 1.752018] End [addr_width:00000000, read_dumy:08, read_opcode:00000065]
>
> Also, one more thing when we are returning from the function, we are over-writing the values of addr_widthm read_dummy and read_opcode.
> Is this correct?

Yes, that's correct.

>
> out:
> nor->addr_width = addr_width;
> nor->read_dummy = read_dummy;
> nor->read_opcode = read_opcode;
> return ret;
> }
>