Operating points in imx6*.dtsi files

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Operating points in imx6*.dtsi files

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adrianmcgrath
Contributor III

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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igorpadykov
NXP TechSupport
NXP TechSupport

Hi Adrian

operating points are described in datasheets

Table 6. Operating Ranges i.MX6DQ Datasheet (rev.4, 7/2015)

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf

Table 8. Operating Ranges i.MX6SDL Datasheet (rev.5, 6/2015)

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6SDLCEC.pdf

Table 11. Operating ranges i.MX6SX Datasheet (rev.1, 9/2015)

http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6SXCEC.pdf

Best regards

igor

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adrianmcgrath
Contributor III

Thanks Igor, I'll be sure to keep the values below 1.3V

Are you able to comment on the variation of the values used in the dtsi files?

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