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Operating points in imx6*.dtsi files

Question asked by Adrian McGrath on Mar 2, 2016
Latest reply on Mar 3, 2016 by Adrian McGrath

Good afternoon all

 

I've just been looking through the imx6*.dtsi files in the arch/arm/boot/dts directory of kernel 3.14.28 and have noticed a few differences between the operating points that are stated. I've tabulated them for ease and highlighted the differences in red.

 

  

DSTI file – Voltage operating points (uV)
Speed (Khz)imx6q.dtsiimx6dl.dtsiimx6sl.dtsiimx6sx.dtsi
12000001275000
9960001250000127500012750001250000
8520001250000
7920001175000117500011750001175000
39600097500011500009750001075000
198000975000

 

 

  

 

DSTI file – Voltage fsl,soc-operating points (uV)
Speed (Khz)imx6q.dtsiimx6dl.dtsiimx6sl.dtsiimx6sx.dtsi
12000001275000
9960001250000117500012250001175000
8520001250000
7920001175000117500011750001175000
3960001175000117500011750001175000
1980001175000

 

 

 

Questions:

1) Please could "someone in the know" comment on the variation of the operating point voltages?

2) Also, please could someone confirm the maximum safe value to enter for these operating point values?

 

Many thanks

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