Messages in this thread | | | Date | Sun, 7 Aug 2022 01:22:25 +1000 | From | Tom Fitzhenry <> | Subject | Re: [PATCH v2] mtd: spi-nor: siliconkaiser: add support for sk25lp128 |
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On 21/7/22 18:08, Tudor.Ambarus@microchip.com wrote: > Does this flash implement the manufacturer ID continuation codes? > Can you read more bytes of manufacturer ID and dump them?
I'm not sure how to do this, but from what I can gather, flash chips that implement manufacturer ID continuation codes return >3 bytes in response to RDID. Is this correct?
To do this, in tools/spi/spidex_fdx.c I set buf[0] = 0x9F, and then executed this with a large recvbuf:
$ sudo ./a.out -m 6 /dev/spidev0.0 /dev/spidev0.0: spi mode 0x0, 8 bits per word, 10000000 Hz max response( 6, 7): 25 70 18 25 70 18
It looks like the 3-byte response has cycled, suggesting this flash chip does not implement continuation codes.
> If the flash does not define the continuation codes, we'll need to > add this flash in a ID collisions driver.
I will do this in v3.
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