Dear Sore, Kever, Am 12.11.19 um 11:19 schrieb Soeren Moch: > > > On 12.11.19 11:02, Kever Yang wrote: >> Markus, >> >> >> On 2019/11/12 下午4:16, Markus Reichl wrote: >>> Hi Kever, >>> >>> have a rk3399-roc-pc running mainline U-Boot and kernel and vdd_log is >>> showing 1118 mV. >> >> The rk3399-roc-pc have the same vdd_log circuit in schematic, so it >> should like the patch 1/3 of >> >> this patch set. >> >> I don't understand who is setting this value, maybe the default value >> without pwm regulator enabled? >> >>> Is this a danger for the board? >>> How to fix it? >> >> The best way is to set correct min/max microvolt of the >> regulator(measure with PWM output low and high), > I didn't look into the schematic of this board, but if it is similar to > RockPro64, setting the pwm regulator to the max voltage of 1.7V will > probably kill the rk3399 immediately. So I recommend not to do this... > It has to be set to 450mV - 1400mV to give 953mV. I will come out with a patch that fixes this. > Regards, > Soeren >> >> (note that if no driver touch the regulator, the PWM is default >> input, not output;) >> to >> and set a init-microvolt for U-Boot driver, and I think no kernel >> driver touch this regulator now. >> >> >> Thanks, >> >> - Kever >> >>> Btw. vin-supply for this pwm-regulator is ignored and I could not >>> find it >>> in bindings doc. >>> >>> Gruß, >> >> > > > _______________________________________________ > Linux-rockchip mailing list > Linux-rockchip@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-rockchip > Gruß, -- Markus Reichl
