Messages in this thread | | | Subject | Re: [PATCH 2/3] arm64: dts: rk3399-rock960: add vdd_log | From | Kever Yang <> | Date | Tue, 12 Nov 2019 16:10:17 +0800 |
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On 2019/11/11 下午1:22, Manivannan Sadhasivam wrote: > Hi Kever, > > On Mon, Nov 11, 2019 at 08:51:57AM +0800, Kever Yang wrote: >> Add vdd_log node according to rock960 schematic V13. >> >> Signed-off-by: Kever Yang <kever.yang@rock-chips.com> >> --- >> >> arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi | 12 ++++++++++++ >> 1 file changed, 12 insertions(+) >> >> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi >> index c7d48d41e184..73afee257115 100644 >> --- a/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi >> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock960.dtsi >> @@ -76,6 +76,18 @@ >> regulator-always-on; >> vin-supply = <&vcc5v0_sys>; >> }; >> + >> + vdd_log: vdd-log { >> + compatible = "pwm-regulator"; >> + pwms = <&pwm2 0 25000 1>; >> + regulator-name = "vdd_log"; >> + regulator-always-on; >> + regulator-boot-on; >> + regulator-min-microvolt = <800000>; >> + regulator-max-microvolt = <1400000>; >> + regulator-init-microvolt = <950000>; > The default value seems to be 0.9v as per both Rock960 and Ficus schematics.
The default value is 0.9V when pwm-regulator is not enabled, and this 'init-microvolt' suppose to set the
init value when pwm-regulator is enabled. I set this to 950mV because Peter report that he experience
the system hang during Fedora boot up, and update the vdd_log to 950mV can fix the issue due to
engineer measure on another rk3399 board puma-Q7.
Thanks,
- Kever
> > Other than that, > Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > > Thanks, > Mani > >> + vin-supply = <&vcc_sys>; >> + }; >> }; >> >> &cpu_l0 { >> -- >> 2.17.1 >>
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