On 12/4/25 7:47 PM, Paul Sajna wrote: > December 4, 2025 at 12:50 PM, "Konrad Dybcio" <[email protected] > mailto:[email protected]?to=%22Konrad%20Dybcio%22%20%3Ckonrad.dybcio%40oss.qualcomm.com%3E > > wrote: > > >> >> On 12/3/25 10:40 AM, Paul Sajna wrote: >> >>> >>> These regulators are required for the LCD >>> >>> Signed-off-by: Paul Sajna <[email protected]> >>> --- >>> arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts | 17 +++++++++++++++++ >>> 1 file changed, 17 insertions(+) >>> >>> diff --git a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> index 8b88f75b36af..cdaf84de5e6c 100644 >>> --- a/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> +++ b/arch/arm64/boot/dts/qcom/sdm845-lg-judyln.dts >>> @@ -56,10 +56,27 @@ zap-shader { >>> }; >>> }; >>> >>> +&ibb { >>> + regulator-min-microvolt = <5500000>; >>> + regulator-max-microvolt = <5700000>; >>> >> These ranges seem much more reasonable, although I would still >> expect there's a single operational voltage - unless the panel driver >> is supposed to call regulator_set_voltage() in some different power >> modes? >> >> Konrad >> > > So min/max both 55? Or is there another property I should use? > I wasn't sure if that would be physically hard for the regulator to maintain > such precision, so I cross-referenced some other DTs in the qcom folder and > found this 200mv allowance in one of the sony devices.
These regulators are very accurate - set it to 5.5 Konrad
