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SubjectRe: [PATCH 2/3] arm64: dts: rk3399-rock960: add vdd_log
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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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