linux-kernel - Re: [PATCH v3 2/4] Documentation: bindings: mfd: cros ec: document vbc EC property

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Message-ID: <20150923003401.GB16510@x1>
Date:	Wed, 23 Sep 2015 01:34:01 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Emilio López <emilio.lopez@...labora.co.uk>
Cc:	gregkh@...uxfoundation.org, olof@...om.net, kgene@...nel.org,
	k.kozlowski@...sung.com, linux@...ck-us.net,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH v3 2/4] Documentation: bindings: mfd: cros ec: document
 vbc EC property

On Mon, 21 Sep 2015, Emilio López wrote:

> Some EC implementations include a small nvram space used to store
> verified boot context data. This boolean property lets us indicate
> whether this space is available or not on a specific EC implementation.
> 
> Signed-off-by: Emilio López <emilio.lopez@...labora.co.uk>
> ---
> 
> Patch is new in v3, split from 3/4
> 
>  Documentation/devicetree/bindings/mfd/cros-ec.txt | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/cros-ec.txt b/Documentation/devicetree/bindings/mfd/cros-ec.txt
> index 1777916..136e0c2 100644
> --- a/Documentation/devicetree/bindings/mfd/cros-ec.txt
> +++ b/Documentation/devicetree/bindings/mfd/cros-ec.txt
> @@ -34,6 +34,10 @@ Required properties (LPC):
>  - compatible: "google,cros-ec-lpc"
>  - reg: List of (IO address, size) pairs defining the interface uses
>  
> +Optional properties (all):
> +- google,has-vbc-nvram: Some implementations of the EC include a small
> +  nvram space used to store verified boot context data. This boolean flag
> +  is used to specify whether this nvram is present or not.

Is there no way to check for this at runtime?

>  Example for I2C:
>  

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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