linux-kernel - Re: [PATCH] phy: qcom-qusb2: Add support for SDM630/660

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Date:   Tue, 29 Sep 2020 14:12:54 -0500
From:   Rob Herring <robh@...nel.org>
To:     kholk11@...il.com
Cc:     agross@...nel.org, bjorn.andersson@...aro.org, kishon@...com,
        marijns95@...il.com, konradybcio@...il.com,
        martin.botka1@...il.com, devicetree@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, phone-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] phy: qcom-qusb2: Add support for SDM630/660

On Sat, Sep 26, 2020 at 03:11:57PM +0200, kholk11@...il.com wrote:
> From: Konrad Dybcio <konradybcio@...il.com>
> 
> QUSB on these SoCs actually uses *almost* the same
> configuration that msm8996 does, so we can reuse
> the phy_cfg from there with just a single change
> (se clock scheme).
> 
> Signed-off-by: Konrad Dybcio <konradybcio@...il.com>
> Signed-off-by: AngeloGioacchino Del Regno <kholk11@...il.com>
> ---
>  Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml | 1 +
>  drivers/phy/qualcomm/phy-qcom-qusb2.c                     | 7 ++++++-
>  2 files changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
> index ccda92859eca..97dae24752b4 100644
> --- a/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
> +++ b/Documentation/devicetree/bindings/phy/qcom,qusb2-phy.yaml
> @@ -21,6 +21,7 @@ properties:
>                - qcom,ipq8074-qusb2-phy
>                - qcom,msm8996-qusb2-phy
>                - qcom,msm8998-qusb2-phy
> +              - qcom,sdm660-qusb2-phy
>        - items:
>            - enum:
>                - qcom,sc7180-qusb2-phy
> diff --git a/drivers/phy/qualcomm/phy-qcom-qusb2.c b/drivers/phy/qualcomm/phy-qcom-qusb2.c
> index 557547dabfd5..a4d706b361b9 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qusb2.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qusb2.c
> @@ -702,7 +702,8 @@ static int qusb2_phy_init(struct phy *phy)
>  	usleep_range(150, 160);
>  
>  	/* Default is single-ended clock on msm8996 */
> -	qphy->has_se_clk_scheme = true;
> +	if (!of_device_is_compatible(phy->dev.of_node, "qcom,sdm660-qusb2-phy"))
> +		qphy->has_se_clk_scheme = true;

You should just pull this from the driver data.

>  	/*
>  	 * read TCSR_PHY_CLK_SCHEME register to check if single-ended
>  	 * clock scheme is selected. If yes, then disable differential
> @@ -818,6 +819,10 @@ static const struct of_device_id qusb2_phy_of_match_table[] = {
>  	}, {
>  		.compatible	= "qcom,msm8998-qusb2-phy",
>  		.data		= &msm8998_phy_cfg,
> +	}, {
> +		.compatible	= "qcom,sdm660-qusb2-phy",
> +		/* sdm630/660 use the same config as msm8996. */
> +		.data		= &msm8996_phy_cfg,
>  	}, {
>  		/*
>  		 * Deprecated. Only here to support legacy device
> -- 
> 2.28.0
>