On 24 May 2015 at 10:03, Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx> wrote: > 2015-05-24 2:35 GMT+09:00 Anand Moon <linux.amoon@xxxxxxxxx>: >> Hi Krzysztof, >> >> I did some debugging on the this using powerdebug utility. >> Using LDO7 to control TMU seams to me correct option compared to BUCK3. >> >> Setting LDO7 to control TMU I observed following output on powerdebug. >> I observed that the power drawn by the board on Odroid show is much >> less compare to BUCK3 on the same setup. >> I can see the HDMI output on Odroid-V2 display screen. >> I have done some stress testing on this configuration and It worked correctly. >> >> Powerdebug output using LDO7 >> --------------------------------------------------------------------------------------------------------------- >> PowerDebug 0.7.3 Clocks Regulators Sensors Gpio >> Name Status State Type Users Microvolts >> Min u-volts Max u-volts >> phy 0 0 >> 0 0 >> phy 0 0 >> 0 0 >> vdd_ldo1 enabled voltage 0 1000000 >> 1000000 1000000 >> LDO1 0 0 >> 0 0 >> LDO2 enabled voltage 0 1800000 >> 0 0 >> vdd_ldo3 enabled voltage 0 1800000 >> 1800000 1800000 >> LDO3 0 0 >> 0 0 >> LDO4 enabled voltage 0 1800000 >> 0 0 >> vdd_ldo5 enabled voltage 0 1800000 >> 1800000 1800000 >> LDO5 0 0 >> 0 0 >> vdd_ldo6 enabled voltage 0 1000000 >> 1000000 1000000 >> hdmi okay 0 0 >> 0 0 >> hdmi okay 0 0 >> 0 0 >> LDO6 0 0 >> 0 0 >> vdd_ldo7 enabled voltage 0 1800000 >> 1800000 1800000 >> hdmi okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> LDO7 0 0 >> 0 0 >> vdd_ldo8 enabled voltage 0 1800000 >> 1800000 1800000 >> LDO8 0 0 >> 0 0 >> vdd_ldo9 enabled voltage 0 3000000 >> 3000000 3000000 >> LDO9 0 0 >> 0 0 >> >> Powerdebug output using BUCK3. >> -------------------------------------------------------------------------------------------------------------------------- >> PowerDebug 0.7.3 Clocks Regulators Sensors Gpio >> Name Status State Type Users Microvolts >> Min u-volts Max u-volts >> LDO21 disabled voltage 0 1800000 >> 0 0 >> LDO22 disabled voltage 0 1200000 >> 0 0 >> LDO23 enabled voltage 0 1100000 >> 0 0 >> tsp_io enabled voltage 0 2800000 >> 2800000 2800000 >> LDO24 0 0 >> 0 0 >> LDO25 disabled voltage 0 1800000 >> 0 0 >> vdd_ldo26 enabled voltage 0 3000000 >> 3000000 3000000 >> LDO26 0 0 >> 0 0 >> LDO27 enabled voltage 0 1000000 >> 0 0 >> LDO28 disabled voltage 0 3300000 >> 0 0 >> LDO29 disabled voltage 0 1800000 >> 0 0 >> LDO30 disabled voltage 0 1800000 >> 0 0 >> LDO31 disabled voltage 0 1800000 >> 0 0 >> LDO32 disabled voltage 0 1800000 >> 0 0 >> LDO33 disabled voltage 0 1800000 >> 0 0 >> LDO34 disabled voltage 0 3000000 >> 0 0 >> LDO35 disabled voltage 0 1600000 >> 0 0 >> LDO36 disabled voltage 0 1800000 >> 0 0 >> LDO37 disabled voltage 0 1800000 >> 0 0 >> LDO38 disabled voltage 0 2800000 >> 0 0 >> vdd_mif enabled voltage 0 1100000 >> 800000 1300000 >> BUCK1 0 0 >> 0 0 >> vdd_arm enabled voltage 0 1000000 >> 800000 1500000 >> BUCK2 0 0 >> 0 0 >> vdd_int enabled voltage 0 1000000 >> 800000 1400000 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> tmu okay 0 0 >> 0 0 >> BUCK3 0 0 >> 0 0 >> vdd_g3d enabled voltage 0 1000000 >> 800000 1400000 >> BUCK4 0 0 >> 0 0 >> vdd_mem enabled voltage 0 1200000 >> 800000 1400000 >> BUCK5 0 0 >> 0 0 >> vdd_kfc enabled voltage 0 1025000 >> 800000 1500000 >> >> So I would like to go with LDO7. >> >> Please share your thoughts. > > I don't understand how grepping through /sys/class/regulator helps in > making this decision. I just don't get it. Can you please explain it > to me? > > Best regards, > Krzysztof Hi Krzysztof, I am just trying to understand the how the DTS changes get mapped internally. If their seem to be a problem with the changes, then I could figure it out but doing some testing. -Anand Moon -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
