Flashing host SPI NOR

[Cédric Le Goater]

Hello,

On 1/24/19 11:09 AM, Aaron Williams wrote:
> Hi all,
> 
> I've run into a problem when it comes to flashing our host SPI NOR. If I boot 
> our host then the SPI NOR is put in a different mode and I am unable to write 
> to it from OpenBMC. The only way I can update our host SPI NOR is if I first 
> power down the host then reboot OpenBMC. Is there some way I can force OpenBMC 
> to re-initialize the SPI NOR before writing to it? I can read from the SPI nor 
> just fine from the BMC after the host has accessed it, I just can't erase or 
> write to it without everything getting corrupted. The device is a Macronix 
> MX25L25645GMI-08G. Note that on the host side we are using QREAD and 4PP mode 
> and 4 bit mode whereas for OpenBMC we only have 1 bit mode wired up. 

Could you give us a little more information on the platform, host and BMC ? 

which host FW and version ? Which version of OpenBMC ?

Thanks,

C.  
  

> Ideally I'd love to be able to make use of the GPIO arbitration we have 
> between the host and the BMC. We have two GPIO pins, one where the host 
> requests access to the SPI NOR and the other where the BMC grants access.
> 
> -Aaron
> 
>