[PATCH 02/11] dt-bindings: wkup_m3_ipc: Add vtt toggling bindings

[Nishanth Menon]

On 13:53-20220219, Drew Fustini wrote:
> From: Dave Gerlach <d-gerlach at ti.com>
> 
> 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 at ti.com>
> Signed-off-by: Drew Fustini <dfustini at baylibre.com>
> ---
>  .../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 at 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