diff options
| author | Drew Fustini <dfustini@baylibre.com> | 2022-04-09 14:12:14 -0700 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2022-04-13 16:48:24 -0500 |
| commit | 376eb490c7811b026ebfed32280688620dd1c0ca (patch) | |
| tree | 62afd552bdf4d99ca613c8de115bbc6b1e97fd55 /Documentation/devicetree/bindings/soc/ti | |
| parent | fee6de80bdd3df976a43f3092a165cb43c072f20 (diff) | |
dt-bindings: wkup-m3-ipc: Add vtt toggle gpio pin property
Document Wakeup M3 IPC property that indicates a GPIO pin is connected
to the enable pin on DDR VTT regulator and can be toggled during low
power mode transitions.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
[dfustini: converted to YAML, removed unnecessary "ti,needs-vtt-toggle"]
Signed-off-by: Drew Fustini <dfustini@baylibre.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220409211215.2529387-2-dfustini@baylibre.com
Diffstat (limited to 'Documentation/devicetree/bindings/soc/ti')
| -rw-r--r-- | Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml b/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml index d855c01ce61c..7f4a75c5fcaa 100644 --- a/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml +++ b/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml @@ -24,6 +24,14 @@ description: |+ A wkup_m3_ipc device node is used to represent the IPC registers within an SoC. + Support for VTT Toggle + ================================== + On some boards like the AM335x EVM-SK and the AM437x GP EVM, a GPIO pin is + connected to the enable pin on the DDR VTT regulator. This allows the + regulator to be disabled upon suspend and enabled upon resume. Please note + that the GPIO pin must be part of the GPIO0 module as only this GPIO module + is in the wakeup power domain. + properties: compatible: enum: @@ -51,6 +59,10 @@ properties: mbox_wkupm3 child node. maxItems: 1 + ti,vtt-gpio-pin: + $ref: /schemas/types.yaml#/definitions/uint32 + description: GPIO pin connected to enable pin on VTT regulator + required: - compatible - reg @@ -76,6 +88,7 @@ examples: interrupts = <78>; ti,rproc = <&wkup_m3>; mboxes = <&mailbox &mbox_wkupm3>; + ti,vtt-gpio-pin = <7>; }; }; ... |