[ast2500] aspeed-smc fail with MX25L25635F

[Cédric Le Goater]

On 4/5/21 8:08 AM, Shakeeb B K wrote:
> Hi Cédric,
> 
> On Fri, Apr 2, 2021 at 12:45 PM Cédric Le Goater <clg at kaod.org <mailto:clg at kaod.org>> wrote:
> 
>     Hello,
> 
>     On 4/1/21 5:22 PM, Shakeeb B K wrote:
>     > Hi Cédric,
>     >
>     > The part we are using is *MX25L25635F* https://www.macronix.com/Lists/Datasheet/Attachments/7414/MX25L25635F,%203V,%20256Mb,%20v1.5.pdf <https://www.macronix.com/Lists/Datasheet/Attachments/7414/MX25L25635F,%203V,%20256Mb,%20v1.5.pdf> <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.macronix.com%2FLists%2FDatasheet%2FAttachments%2F7414%2FMX25L25635F%2C%25203V%2C%2520256Mb%2C%2520v1.5.pdf&data=04%7C01%7Cspasha%40nvidia.com%7C4cf89d8779c84d638c6f08d8ef7d0919%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637522667609971209%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=hYy5Cpi06y4T0DpFb4%2FDeo2nEy5Cn3rf3l%2BEO%2FaPP%2FU%3D&reserved=0
>     <https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.macronix.com%2FLists%2FDatasheet%2FAttachments%2F7414%2FMX25L25635F%2C%25203V%2C%2520256Mb%2C%2520v1.5.pdf&data=04%7C01%7Cspasha%40nvidia.com%7C4cf89d8779c84d638c6f08d8ef7d0919%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C637522667609971209%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=hYy5Cpi06y4T0DpFb4%2FDeo2nEy5Cn3rf3l%2BEO%2FaPP%2FU%3D&reserved=0>>
>     >
>     > Attaching the failed boot log - full_boot.log
> 
>     This was failing in 5.8 already. 
> 
> 
>     > The patch that fixes the problem - workaround.patch
> 
>     OK. You are disabling Dual I/O.
> 
>     > A patch to override read opcode - 001-Debug.patch
>     > Failing log with post fixup read opcode update - fail_post_fixup.log
> 
>     Could you check the SPI wiring on the schematics of your AST2500 dgx board ? 
> 
>     If it is single wired, then I suggest a work around like the one attached.
> 
> 
> We have MOSI, MISO datalines connected and the workaround is working for us.
> But I just wanted to check if anybody got dual mode working with MX25L25635F,

IBM has at least two systems using dual data reads on the MX25L25635F 
with the ast2400 and the ast2500 SoC. 

> and what would be the right fix for it in spi-nor.

a DT property would be the best solution.

C.