UCD registers for fault analysis

[Joel Stanley]

Hi Matt,

On Tue, Jun 6, 2017 at 5:40 AM, Matt Spinler
<mspinler at linux.vnet.ibm.com> wrote:
> Hi Joel,
>
> I opened issue https://github.com/openbmc/openbmc/issues/1727 to describe
> some UCD90160 registers we need to be able to access in order to do power
> fault analysis.   Please take a look and see if its doable to add these to a
> driver.

Thanks for the heads up. I've put this on my list of things to look
at. Please remind me if I haven't responded in about a week.

Cheers,

Joel


>
> They are:
>
> * CLEAR_FAULTS - command 0x03
> * Clear logged faults - write 0x00 to register 0xEA
> * STATUS_WORD - 0x79
> * STATUS_VOUT - 0x7A - all pages
> * NUM_PAGES - 0xD6 - though maybe we can get the number of pages another way
> * MFR_STATUS - 0xF3 - page 0 - for reading the GPI bits
>
> Also:
>
> Write, 0xFA 0x08
> Read, 0xFB
> Write, 0xFA 0x09
> Read, 0xFB
> Write, 0xFA 0x0A
> Read, 0xFB
> Write, 0xFA 0x0E
> Read, 0xFB
> Write, 0xFA 0x11
> Read, 0xFB
> Write, 0xFA 0x0B
> Read, 0xFB
>
> I also have a document I will send you offline.
>