[PATCH v2 3/4] arm64: dts: qcom: x1-dell-thena: mark l12b and l15b always-on

Konrad Dybcio konrad.dybcio at oss.qualcomm.com
Tue Jun 16 05:22:48 PDT 2026


On 5/21/26 3:09 AM, Michael Scott wrote:
> The l12b and l15b supplies are used by components that are not (fully)
> described (and some never will be) and must never be disabled.
> 
> Mark the regulators as always-on to prevent them from being disabled,
> for example, when consumers probe defer or suspend.
> 
> Note that these supplies currently have no consumers described in
> mainline for dell-thena beyond the audio codec (vdd-buck/vdd-rxtx/
> vdd-io on wcd938x), which can release them when the codec goes idle.
> The board-level gpio-fixed regulators that feed the Type-C retimer's
> VDDIO and other rails are not described with a vin-supply link, so
> the kernel cannot keep their parent LDOs alive on its own.
> 
> This mirrors the same change Johan Hovold applied to every other
> X1E80100 board in a March 2025 series; commit 63169c07d740
> ("arm64: dts: qcom: x1e80100-dell-xps13-9345: mark l12b and l15b always-on")
> is representative. The dell-thena board file was introduced four months
> later and did not inherit that change; this patch closes the gap.
> 
> Fixes: e7733b42111c ("arm64: dts: qcom: Add support for Dell Inspiron 7441 / Latitude 7455")
> Cc: stable at vger.kernel.org
> Signed-off-by: Michael Scott <mike.scott at oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio at oss.qualcomm.com>

Konrad



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