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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 13:53-20220219, Drew Fustini wrote: > From: Dave Gerlach > > Add description of the wkup_m3_ipc DT properties that can be used to > toggle VTT regulator during low power mode transitions. > > Signed-off-by: Dave Gerlach > Signed-off-by: Drew Fustini > --- > .../bindings/soc/ti/wkup_m3_ipc.txt | 34 +++++++++++++++++++ NAK. no more txt files please. convert to yaml prior to adding features. > 1 file changed, 34 insertions(+) > > diff --git a/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt b/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt > index 401550487ed6..4cdbb60fd0d0 100644 > --- a/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt > +++ b/Documentation/devicetree/bindings/soc/ti/wkup_m3_ipc.txt > @@ -55,3 +55,37 @@ Example: > ... > }; > }; > + > +Support for VTT Toggle > +================================== > +In order to enable the support for VTT toggle during Suspend/Resume > +sequence needed by some boards (like AM335x EVM-SK & AM437x GP EVM), > +the below DT properties are required. It is possible to toggle VTT > +using one of two methods depending on the SoC being used, either > +GPIO0 toggle (AM335x and AM437x), or any GPIO with DS_PAD_CONFIG > +bits in the control module (AM437x only). > + > +VTT Toggle using GPIO0 > +---------------------------------- > +Supported by: AM335x and AM437x > +Used on: AM335x EVM-SK > + > +Optional properties: > +- ti,needs-vtt-toggle: Indicates that the boards requires VTT toggling > + during suspend/resume. > +- ti,vtt-gpio-pin: Specifies the GPIO0 pin used for VTT toggle. > + > +Important Note: > +- Here it is assumed that VTT Toggle will be done using a pin on GPIO-0 Instance. > + It will not work on any other GPIO using the above properties, regardless of > + which part is being used. > + > +Example: > + wkup_m3_ipc: wkup_m3_ipc@1324 { > + compatible = "ti,am3352-wkup-m3-ipc"; > + ... > + ... > + ti,needs-vtt-toggle; > + ti,vtt-gpio-pin = <7>; > + ... > + }; > -- > 2.32.0 > -- Regards, Nishanth Menon Key (0xDDB5849D1736249D)/Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel