On 13:53-20220219, Drew Fustini wrote:
> From: Dave Gerlach <d-gerlach@xxxxxx>
>
> 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 <d-gerlach@xxxxxx>
> Signed-off-by: Drew Fustini <dfustini@xxxxxxxxxxxx>
> ---
> .../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
