[PATCH v3 2/3] coresight-tnoc: add platform driver to support Interconnect TNOC

[Leo Yan]

On Thu, Aug 28, 2025 at 02:27:23AM -0700, Yuanfang Zhang wrote:

[...]

> @@ -51,12 +53,17 @@ static void trace_noc_enable_hw(struct trace_noc_drvdata *drvdata)
>  {
>  	u32 val;
>  
> +	/* No valid ATID, simply enable the unit */
> +	if (drvdata->atid == -EOPNOTSUPP) {
> +		writel(TRACE_NOC_CTRL_PORTEN, drvdata->base + TRACE_NOC_CTRL);
> +		return;
> +	}
> +
>  	/* Set ATID */
>  	writel_relaxed(drvdata->atid, drvdata->base + TRACE_NOC_XLD);
>  
>  	/* Set the data word count between 'SYNC' packets */
>  	writel_relaxed(TRACE_NOC_SYNC_INTERVAL, drvdata->base + TRACE_NOC_SYNCR);
> -

Unintended change ?

>  	/* Set the Control register:
>  	 * - Set the FLAG packets to 'FLAG' packets
>  	 * - Set the FREQ packets to 'FREQ_TS' packets
> @@ -68,8 +75,8 @@ static void trace_noc_enable_hw(struct trace_noc_drvdata *drvdata)
>  	val &= ~TRACE_NOC_CTRL_FLAGTYPE;
>  	val |= TRACE_NOC_CTRL_FREQTYPE;
>  	val |= TRACE_NOC_CTRL_PORTEN;
> -

Ditto.

>  	writel(val, drvdata->base + TRACE_NOC_CTRL);
> +

Ditto.

Otherwise, LGTM:

Reviewed-by: Leo Yan <leo.yan at arm.com>