About the commit imx: mx6ull: update the REFTOP_VBGADJ setting

[Michael Nazzareno Trimarchi]

Hi

On Fri, Dec 4, 2020 at 10:44 PM Michael Nazzareno Trimarchi
<michael at amarulasolutions.com> wrote:
>
> Hi Peng
>
> I have a design with imx6ull that is running properly according to the
> manufacturer with the old REFTOP_VBGA set
> BM_ANADIG_ANA_MISC0_REFTOP_VBGADJ,. With this commit, the TJunction of
> the CPU is around 8 degree more than without. The commit message does
> not provide any info
>
> According to the design team, we need to set REFTOP_VBGADJ
>     in PMU MISC0 according to the REFTOP_TRIM[2:0] fuse. the
>     actually table is as below:
>
>       '000" - set REFTOP_VBGADJ[2:0] to 3'b000
>       '001" - set REFTOP_VBGADJ[2:0] to 3'b001
>       '010" - set REFTOP_VBGADJ[2:0] to 3'b010
>       '011" - set REFTOP_VBGADJ[2:0] to 3'b011
>       '100" - set REFTOP_VBGADJ[2:0] to 3'b100
>       '101" - set REFTOP_VBGADJ[2:0] to 3'b101
>       '110" - set REFTOP_VBGADJ[2:0] to 3'b110
>       '111" - set REFTOP_VBGADJ[2:0] to 3'b111
>
> Can someone describe to me better? The device needs to run in a very
> hot environment and  10 to 8 degrees on the junction
> are really important.

I think that is used as reference temperatur too, for measuring
temperature in the processor.
I think that i need to ask to us a thermal camera

Michael

>
> In the same environment:
> temp without this patch 34
> temp with is 43
>
> Register value is
> 0x240080E8
> and
> 0x24008088
>
> Michael
>
>
> --
> Michael Nazzareno Trimarchi
> Amarula Solutions BV
> COO Co-Founder
> Cruquiuskade 47 Amsterdam 1018 AM NL
> T. +31(0)851119172
> M. +39(0)3479132170
> [`as] https://www.amarulasolutions.com



-- 
Michael Nazzareno Trimarchi
Amarula Solutions BV
COO Co-Founder
Cruquiuskade 47 Amsterdam 1018 AM NL
T. +31(0)851119172
M. +39(0)3479132170
[`as] https://www.amarulasolutions.com