linux-kernel - Re: [PATCH v2 06/36] coresight: funnel: Clean up device book keeping

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Message-ID: <20190417201421.GA14163@xps15>
Date:   Wed, 17 Apr 2019 14:14:21 -0600
From:   Mathieu Poirier <mathieu.poirier@...aro.org>
To:     Suzuki K Poulose <suzuki.poulose@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        coresight@...ts.linaro.org, mike.leach@...aro.org,
        rjw@...ysocki.net, robert.walker@....com
Subject: Re: [PATCH v2 06/36] coresight: funnel: Clean up device book keeping

On Mon, Apr 15, 2019 at 05:03:49PM +0100, Suzuki K Poulose wrote:
> In preparation to use a consistent device naming scheme,
> clean up the device link tracking in funnel driver.
> Use the "coresight" device instead of the "real" parent device
> for all internal purposes. All other requests (e.g, power management,
> DMA operations) must use the "real" device which is the parent device.
> 
> Cc: Mathieu Poirier <mathieu.poirier@...aro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> ---
>  drivers/hwtracing/coresight/coresight-funnel.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 9279251..1085f31 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -37,7 +37,6 @@
>   */
>  struct funnel_drvdata {
>  	void __iomem		*base;
> -	struct device		*dev;

Please remove @dev from the structure documentation.

With that:
Reviewed-by: Mathieu Poirier <mathieu.poirier@...aro.org>

>  	struct clk		*atclk;
>  	struct coresight_device	*csdev;
>  	unsigned long		priority;
> @@ -77,7 +76,7 @@ static int funnel_enable(struct coresight_device *csdev, int inport,
>  	rc = funnel_enable_hw(drvdata, inport);
>  
>  	if (!rc)
> -		dev_dbg(drvdata->dev, "FUNNEL inport %d enabled\n", inport);
> +		dev_dbg(&csdev->dev, "FUNNEL inport %d enabled\n", inport);
>  	return rc;
>  }
>  
> @@ -105,7 +104,7 @@ static void funnel_disable(struct coresight_device *csdev, int inport,
>  
>  	funnel_disable_hw(drvdata, inport);
>  
> -	dev_dbg(drvdata->dev, "FUNNEL inport %d disabled\n", inport);
> +	dev_dbg(&csdev->dev, "FUNNEL inport %d disabled\n", inport);
>  }
>  
>  static const struct coresight_ops_link funnel_link_ops = {
> @@ -160,11 +159,11 @@ static ssize_t funnel_ctrl_show(struct device *dev,
>  	u32 val;
>  	struct funnel_drvdata *drvdata = dev_get_drvdata(dev->parent);
>  
> -	pm_runtime_get_sync(drvdata->dev);
> +	pm_runtime_get_sync(dev->parent);
>  
>  	val = get_funnel_ctrl_hw(drvdata);
>  
> -	pm_runtime_put(drvdata->dev);
> +	pm_runtime_put(dev->parent);
>  
>  	return sprintf(buf, "%#x\n", val);
>  }
> @@ -199,7 +198,6 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
>  	if (!drvdata)
>  		return -ENOMEM;
>  
> -	drvdata->dev = &adev->dev;
>  	drvdata->atclk = devm_clk_get(&adev->dev, "atclk"); /* optional */
>  	if (!IS_ERR(drvdata->atclk)) {
>  		ret = clk_prepare_enable(drvdata->atclk);
> -- 
> 2.7.4
>