linux-kernel - Re: [RFC PATCH 1/4] Documentation: mmc: add mmc-sleep-awake

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Message-ID: <20170227190438.m2nnb24qnnjijp5p@rob-hp-laptop>
Date:   Mon, 27 Feb 2017 13:04:38 -0600
From:   Rob Herring <robh@...nel.org>
To:     Ritesh Harjani <riteshh@...eaurora.org>
Cc:     ulf.hansson@...aro.org, linux-mmc@...r.kernel.org,
        adrian.hunter@...el.com, shawn.lin@...k-chips.com,
        devicetree@...r.kernel.org, andy.gross@...aro.org,
        linux-arm-msm@...r.kernel.org, georgi.djakov@...aro.org,
        alex.lemberg@...disk.com, mateusz.nowak@...el.com,
        Yuliy.Izrailov@...disk.com, asutoshd@...eaurora.org,
        david.griego@...aro.org, stummala@...eaurora.org,
        venkatg@...eaurora.org, pramod.gurav@...aro.org,
        jeremymc@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 1/4] Documentation: mmc: add mmc-sleep-awake

On Mon, Feb 20, 2017 at 01:33:09PM +0530, Ritesh Harjani wrote:
> mmc-sleep-awake enables CMD5 awake feature
> & partial_init which can help reduce resume
> latency on emmc.
> 
> Signed-off-by: Ritesh Harjani <riteshh@...eaurora.org>
> ---
>  Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
> index c7f4a0e..b0df54c 100644
> --- a/Documentation/devicetree/bindings/mmc/mmc.txt
> +++ b/Documentation/devicetree/bindings/mmc/mmc.txt
> @@ -53,6 +53,8 @@ Optional properties:
>  - no-sdio: controller is limited to send sdio cmd during initialization
>  - no-sd: controller is limited to send sd cmd during initialization
>  - no-mmc: controller is limited to send mmc cmd during initialization
> +- mmc-sleep-awake: eMMC to support awake by CMD5 partial init to reduce resume
> +  latency.

This is a feature of the controller or card? If a card, this should be 
in a card node probably.

Is there a better name that matches the h/w feature?

Rob

>  
>  *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line
>  polarity properties, we have to fix the meaning of the "normal" and "inverted"
> -- 
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