linux-kernel - Re: [PATCH 3/4] phy: qcom-ufs: Remove -always-on property

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Date:   Fri, 20 Jan 2017 01:09:06 +0530
From:   Vivek Gautam <vivek.gautam@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Kishon Vijay Abraham I <kishon@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-arm-msm@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        Subhash Jadavani <subhashj@...eaurora.org>
Subject: Re: [PATCH 3/4] phy: qcom-ufs: Remove -always-on property

On Thu, Jan 19, 2017 at 4:17 PM, Bjorn Andersson
<bjorn.andersson@...aro.org> wrote:
> The fact that a regulator is always-on is a property of the regulator,
> not a specific consumer. Implementing this in the driver leads to a
> system behaviour that is dependent on if the Qualcomm UFS PHY was ever
> (partially) probed.
>
> If the specific regulator should be always on in a particular device,
> mark it so by specifying "regulator-always-on" in the regulator node.
>
> Cc: Subhash Jadavani <subhashj@...eaurora.org>
> Cc: Vivek Gautam <vivek.gautam@...eaurora.org>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---

Looks good.

Reviewed-by: Vivek Gautam <vivek.gautam@...eaurora.org>

Regards
Vivek

>  Documentation/devicetree/bindings/ufs/ufs-qcom.txt | 1 -
>  drivers/phy/phy-qcom-ufs-i.h                       | 1 -
>  drivers/phy/phy-qcom-ufs.c                         | 5 +----
>  3 files changed, 1 insertion(+), 6 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/ufs/ufs-qcom.txt b/Documentation/devicetree/bindings/ufs/ufs-qcom.txt
> index b6b5130e5f65..1f69ee1a61ea 100644
> --- a/Documentation/devicetree/bindings/ufs/ufs-qcom.txt
> +++ b/Documentation/devicetree/bindings/ufs/ufs-qcom.txt
> @@ -29,7 +29,6 @@ Optional properties:
>  - vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply
>  - vddp-ref-clk-supply   : phandle to UFS device ref_clk pad power supply
>  - vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply
> -- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on
>
>  Example:
>
> diff --git a/drivers/phy/phy-qcom-ufs-i.h b/drivers/phy/phy-qcom-ufs-i.h
> index d505d98cf5f8..13b02b7de30b 100644
> --- a/drivers/phy/phy-qcom-ufs-i.h
> +++ b/drivers/phy/phy-qcom-ufs-i.h
> @@ -77,7 +77,6 @@ struct ufs_qcom_phy_vreg {
>         int min_uV;
>         int max_uV;
>         bool enabled;
> -       bool is_always_on;
>  };
>
>  struct ufs_qcom_phy {
> diff --git a/drivers/phy/phy-qcom-ufs.c b/drivers/phy/phy-qcom-ufs.c
> index bbd317158084..c145fa6e824c 100644
> --- a/drivers/phy/phy-qcom-ufs.c
> +++ b/drivers/phy/phy-qcom-ufs.c
> @@ -242,9 +242,6 @@ static int ufs_qcom_phy_init_vreg(struct device *dev,
>                         }
>                         err = 0;
>                 }
> -               snprintf(prop_name, MAX_PROP_NAME, "%s-always-on", name);
> -               vreg->is_always_on = of_property_read_bool(dev->of_node,
> -                                                          prop_name);
>         }
>
>         if (!strcmp(name, "vdda-pll")) {
> @@ -402,7 +399,7 @@ static int ufs_qcom_phy_disable_vreg(struct device *dev,
>  {
>         int ret = 0;
>
> -       if (!vreg || !vreg->enabled || vreg->is_always_on)
> +       if (!vreg || !vreg->enabled)
>                 goto out;
>
>         ret = regulator_disable(vreg->reg);
> --
> 2.11.0
>
> --
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