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From: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
To: Michael Scott <mike.scott@oss.qualcomm.com>,
	linux-arm-msm@vger.kernel.org
Cc: vkoul@kernel.org, neil.armstrong@linaro.org,
	dmitry.baryshkov@oss.qualcomm.com, wesley.cheng@oss.qualcomm.com,
	abelvesa@kernel.org, faisal.hassan@oss.qualcomm.com,
	linux-phy@lists.infradead.org, andersson@kernel.org,
	konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org,
	conor+dt@kernel.org, devicetree@vger.kernel.org,
	val@packett.cool, bryan.odonoghue@linaro.org,
	laurentiu.tudor1@dell.com, alex.vinarskis@gmail.com,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v2 3/4] arm64: dts: qcom: x1-dell-thena: mark l12b and l15b always-on
Date: Tue, 16 Jun 2026 14:22:48 +0200	[thread overview]
Message-ID: <38dcea05-581c-411f-9196-caac9562d412@oss.qualcomm.com> (raw)
In-Reply-To: <20260521010935.1333494-4-mike.scott@oss.qualcomm.com>

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@vger.kernel.org
> Signed-off-by: Michael Scott <mike.scott@oss.qualcomm.com>
> ---

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

Konrad

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  parent reply	other threads:[~2026-06-16 12:22 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-21  1:09 [PATCH v2 0/4] phy: qcom: qmp-combo fixes + x1-dell-thena DT maintenance Michael Scott
2026-05-21  1:09 ` [PATCH v2 1/4] phy: qcom: qmp-combo: skip USB power_off/exit after device teardown Michael Scott
2026-05-21  1:52   ` sashiko-bot
2026-05-21 11:58   ` Bryan O'Donoghue
2026-05-22 15:59     ` Michael Scott
2026-05-21  1:09 ` [PATCH v2 2/4] phy: qcom: qmp-combo: track whether the cached typec_mux mode was committed to hardware Michael Scott
2026-05-21  2:37   ` sashiko-bot
2026-05-21 12:00   ` Bryan O'Donoghue
2026-05-21  1:09 ` [PATCH v2 3/4] arm64: dts: qcom: x1-dell-thena: mark l12b and l15b always-on Michael Scott
2026-05-21  4:28   ` Val Packett
2026-06-16 12:22   ` Konrad Dybcio [this message]
2026-05-21  1:09 ` [PATCH v2 4/4] arm64: dts: qcom: x1-dell-thena: bump linux,cma to 256 MiB Michael Scott
2026-05-21  3:52   ` Val Packett
2026-05-22 17:42     ` Rob Clark
2026-05-21 12:04   ` Bryan O'Donoghue
2026-05-22 17:16     ` Michael Scott
2026-05-22 21:33       ` Bryan O'Donoghue
2026-05-21  4:39 ` [PATCH v2 0/4] phy: qcom: qmp-combo fixes + x1-dell-thena DT maintenance Val Packett

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