Re: [PATCH v2 2/5] dt-bindings: power: reset: syscon-reboot-mode: allow supplies
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From: Krzysztof Kozlowski <krzk@kernel.org>
Date: 2026-09-30 11:47:18
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linux-devicetree, linux-pm, linux-rockchip, lkml
On Tue, Sep 29, 2026 at 02:28:19PM +0400, Alexey Charkov wrote:
Whatever program that acts on a reboot mode runs before a full OS, so it may lack the capability to enable the regulators it depends on, and a reset that preserves the mode register generally leaves the regulators as the previously running system left them. Allow a reboot mode node to name such supplies, so that they can be turned on while the mode is being requested. Tested-by: Shawn Lin <shawn.lin@rock-chips.com>
Again fake tag.
quoted hunk ↗ jump to hunk
Signed-off-by: Alexey Charkov <redacted> --- .../devicetree/bindings/power/reset/syscon-reboot-mode.yaml | 8 ++++++++ 1 file changed, 8 insertions(+)diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml index 79ffc78b23ea..5ed70c87269e 100644 --- a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml@@ -36,6 +36,14 @@ patternProperties: "^mode-.*$": maxItems: 1 + "^[a-z0-9]+(-[a-z0-9]+)*-supply$": + description: + Supply that has to be powered for whatever program acts on the mode. + That could be a boot ROM with no access to regulators, and a warm reset + leaves them as the previously running system left them and not necessarily + what their expected out-of-reboot state is. Any supply described here is + enabled when a mode is requested, and stays enabled.
This looks like workaround for missing supply handling in actual consumers. Fix your devices instead. Best regards, Krzysztof