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Date:   Fri, 1 Oct 2021 12:57:42 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     Srinivasa Rao Mandadapu <srivasam@...eaurora.org>,
        agross@...nel.org, bjorn.andersson@...aro.org, lgirdwood@...il.com,
        broonie@...nel.org, robh+dt@...nel.org, plai@...eaurora.org,
        bgoswami@...eaurora.org, perex@...ex.cz, tiwai@...e.com,
        srinivas.kandagatla@...aro.org, rohitkr@...eaurora.org,
        linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        swboyd@...omium.org, judyhsiao@...omium.org
Cc:     Venkata Prasad Potturu <potturu@...eaurora.org>
Subject: Re: [PATCH] ASoC: qcom: soundwire: Enable soundwire bus clock for
 version 1.6


> @@ -610,6 +611,12 @@ static int qcom_swrm_init(struct qcom_swrm_ctrl *ctrl)
>  	val = FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_ROW_CTRL_BMSK, ctrl->rows_index);
>  	val |= FIELD_PREP(SWRM_MCP_FRAME_CTRL_BANK_COL_CTRL_BMSK, ctrl->cols_index);
>  
> +	if (ctrl->swrm_hctl_reg) {
> +		val = ioread32(ctrl->swrm_hctl_reg);
> +		val &= 0xFFFFFFFD;

magic value, use a #define MASK_SOMETHING?

> +		iowrite32(val, ctrl->swrm_hctl_reg);
> +	}
> +
>  	ctrl->reg_write(ctrl, SWRM_MCP_FRAME_CTRL_BANK_ADDR(0), val);
>  
>  	/* Enable Auto enumeration */
> @@ -1200,7 +1207,7 @@ static int qcom_swrm_probe(struct platform_device *pdev)
>  	struct qcom_swrm_ctrl *ctrl;
>  	const struct qcom_swrm_data *data;
>  	int ret;
> -	u32 val;
> +	int val, swrm_hctl_reg = 0;
>  
>  	ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
>  	if (!ctrl)
> @@ -1251,6 +1258,9 @@ static int qcom_swrm_probe(struct platform_device *pdev)
>  	ctrl->bus.port_ops = &qcom_swrm_port_ops;
>  	ctrl->bus.compute_params = &qcom_swrm_compute_params;
>  
> +	if (!of_property_read_u32(dev->of_node, "qcom,swrm-hctl-reg", &swrm_hctl_reg))
> +		ctrl->swrm_hctl_reg = devm_ioremap(&pdev->dev, swrm_hctl_reg, 0x4);

if (!ctrl->swrm_hctl_reg)
    return -ENODEV;

?

> +
>  	ret = qcom_swrm_get_port_config(ctrl);
>  	if (ret)
>  		goto err_clk;
> 

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