[Skiboot-stable] [PATCH v2] platform/mihawk: Tune equalization settings for opencapi

[Andrew Donnellan]

On 24/4/20 3:54 am, Frederic Barrat wrote:
> The Bittware 250SOC adapter on Mihawk was showing a high count of CRC
> errors on one of the opencapi slots. The PHY team suggested new
> equalization settings to correct the errors.
> 
> All existing adapters have been tested on mihawk to make sure the
> settings are compatible. However, the new settings should not be used
> on platforms other than mihawk.
> 
> The changes specific to mihawk are:
> - Update the tx_ffe_pre_coeff and tx_ffe_post_coeff input parameters
>    used during zcal
> - turn off the tx_ffe_boost parameter through scom
> 
> Signed-off-by: Frederic Barrat <fbarrat at linux.ibm.com>
> Cc: skiboot-stable at lists.ozlabs.org # skiboot-op940.x
> ---
> 
> Vasant, Oliver: this is for mihawk and should not have any side effect
> on other plaforms. At this point, I'm thoroughly confused whether it
> should go to the skiboot-op940.x branch, as I'm hearing conflicting
> signals. In any case, it should go to master for our own good and be
> able to use our lab systems. Time will sort out the skiboot-op940.x
> status.
> 
> 
> 
> Changelog:
> v2: avoid globals (Andrew)
> 

Thanks.

Reviewed-by: Andrew Donnellan <ajd at linux.ibm.com>

-- 
Andrew Donnellan              OzLabs, ADL Canberra
ajd at linux.ibm.com             IBM Australia Limited