[v2,19/36] coresight: Introduce generic platform data helper
diff mbox series

Message ID 1555344260-12375-20-git-send-email-suzuki.poulose@arm.com
State Superseded
Headers show
Series
  • coresight: Support for ACPI bindings
Related show

Commit Message

Suzuki K Poulose April 15, 2019, 4:04 p.m. UTC
So far we have hard coded the DT platform parsing code in
every driver. Introduce generic helper to parse the information
provided by the firmware in a platform agnostic manner, in preparation
for the ACPI support.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 drivers/hwtracing/coresight/coresight-catu.c       | 13 +++-----
 drivers/hwtracing/coresight/coresight-etb10.c      | 11 +++----
 drivers/hwtracing/coresight/coresight-etm3x.c      | 12 +++-----
 drivers/hwtracing/coresight/coresight-etm4x.c      | 11 +++----
 drivers/hwtracing/coresight/coresight-funnel.c     | 11 +++----
 drivers/hwtracing/coresight/coresight-platform.c   | 36 ++++++++++++++++------
 drivers/hwtracing/coresight/coresight-replicator.c | 12 +++-----
 drivers/hwtracing/coresight/coresight-stm.c        | 11 +++----
 drivers/hwtracing/coresight/coresight-tmc.c        | 13 +++-----
 drivers/hwtracing/coresight/coresight-tpiu.c       | 11 +++----
 include/linux/coresight.h                          |  7 ++---
 11 files changed, 66 insertions(+), 82 deletions(-)

Comments

Mathieu Poirier April 22, 2019, 6:09 p.m. UTC | #1
Hi Suzuki,

On Mon, Apr 15, 2019 at 05:04:02PM +0100, Suzuki K Poulose wrote:
> So far we have hard coded the DT platform parsing code in
> every driver. Introduce generic helper to parse the information
> provided by the firmware in a platform agnostic manner, in preparation
> for the ACPI support.
> 
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
>  drivers/hwtracing/coresight/coresight-catu.c       | 13 +++-----
>  drivers/hwtracing/coresight/coresight-etb10.c      | 11 +++----
>  drivers/hwtracing/coresight/coresight-etm3x.c      | 12 +++-----
>  drivers/hwtracing/coresight/coresight-etm4x.c      | 11 +++----
>  drivers/hwtracing/coresight/coresight-funnel.c     | 11 +++----
>  drivers/hwtracing/coresight/coresight-platform.c   | 36 ++++++++++++++++------
>  drivers/hwtracing/coresight/coresight-replicator.c | 12 +++-----
>  drivers/hwtracing/coresight/coresight-stm.c        | 11 +++----
>  drivers/hwtracing/coresight/coresight-tmc.c        | 13 +++-----
>  drivers/hwtracing/coresight/coresight-tpiu.c       | 11 +++----
>  include/linux/coresight.h                          |  7 ++---
>  11 files changed, 66 insertions(+), 82 deletions(-)
> 
> diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
> index 14d1cf5..65b86ec 100644
> --- a/drivers/hwtracing/coresight/coresight-catu.c
> +++ b/drivers/hwtracing/coresight/coresight-catu.c
> @@ -503,17 +503,14 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct coresight_desc catu_desc;
>  	struct coresight_platform_data *pdata = NULL;
>  	struct device *dev = &adev->dev;
> -	struct device_node *np = dev->of_node;
>  	void __iomem *base;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata)) {
> -			ret = PTR_ERR(pdata);
> -			goto out;
> -		}
> -		dev->platform_data = pdata;
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata)) {
> +		ret = PTR_ERR(pdata);
> +		goto out;
>  	}
> +	dev->platform_data = pdata;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata) {
> diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
> index 6e6e9aa..cd61b54 100644
> --- a/drivers/hwtracing/coresight/coresight-etb10.c
> +++ b/drivers/hwtracing/coresight/coresight-etb10.c
> @@ -681,14 +681,11 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct etb_drvdata *drvdata;
>  	struct resource *res = &adev->res;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -		adev->dev.platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
> +	adev->dev.platform_data = pdata;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
> diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
> index fa2f141..fa2164f 100644
> --- a/drivers/hwtracing/coresight/coresight-etm3x.c
> +++ b/drivers/hwtracing/coresight/coresight-etm3x.c
> @@ -790,20 +790,16 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct etm_drvdata *drvdata;
>  	struct resource *res = &adev->res;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
>  		return -ENOMEM;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -
> -		adev->dev.platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
>  
> +	adev->dev.platform_data = pdata;
>  	drvdata->use_cp14 = fwnode_property_read_bool(dev->fwnode, "arm,cp14");
>  	dev_set_drvdata(dev, drvdata);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
> index 75b923f..998b9f3 100644
> --- a/drivers/hwtracing/coresight/coresight-etm4x.c
> +++ b/drivers/hwtracing/coresight/coresight-etm4x.c
> @@ -976,18 +976,15 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct etmv4_drvdata *drvdata;
>  	struct resource *res = &adev->res;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
>  		return -ENOMEM;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -		adev->dev.platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
> +	adev->dev.platform_data = pdata;
>  
>  	dev_set_drvdata(dev, drvdata);
>  
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 1085f31..2590744 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -185,14 +185,11 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct funnel_drvdata *drvdata;
>  	struct resource *res = &adev->res;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -		adev->dev.platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
> +	adev->dev.platform_data = pdata;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
> diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
> index 4c31299..25a1838 100644
> --- a/drivers/hwtracing/coresight/coresight-platform.c
> +++ b/drivers/hwtracing/coresight/coresight-platform.c
> @@ -230,23 +230,17 @@ static int of_coresight_parse_endpoint(struct device *dev,
>  	return ret;
>  }
>  
> -struct coresight_platform_data *
> +static struct coresight_platform_data *
>  of_get_coresight_platform_data(struct device *dev,
> -			       const struct device_node *node)
> +			       struct coresight_platform_data *pdata)
>  {
>  	int ret = 0;
> -	struct coresight_platform_data *pdata;
>  	struct coresight_connection *conn;
>  	struct device_node *ep = NULL;
>  	const struct device_node *parent = NULL;
>  	bool legacy_binding = false;
> +	struct device_node *node = dev->of_node;
>  
> -	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> -	if (!pdata)
> -		return ERR_PTR(-ENOMEM);
> -
> -	/* Use device name as sysfs handle */
> -	pdata->name = dev_name(dev);
>  	pdata->cpu = of_coresight_get_cpu(node);
>  
>  	/* Get the number of input and output port for this component */
> @@ -298,5 +292,27 @@ of_get_coresight_platform_data(struct device *dev,
>  
>  	return pdata;
>  }
> -EXPORT_SYMBOL_GPL(of_get_coresight_platform_data);
>  #endif
> +
> +struct coresight_platform_data *
> +coresight_get_platform_data(struct device *dev)
> +{
> +	struct coresight_platform_data *pdata;
> +	struct fwnode_handle *fwnode = dev_fwnode(dev);
> +
> +	if (IS_ERR_OR_NULL(fwnode))
> +		return NULL;
> +
> +	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> +	if (!pdata)
> +		return ERR_PTR(-ENOMEM);
> +
> +	/* Use device name as sysfs handle */
> +	pdata->name = dev_name(dev);
> +
> +	if (is_of_node(fwnode))
> +		return of_get_coresight_platform_data(dev, pdata);

Now that I'm looking a patch 26, returning a coresight_platform_data pointer is
a little weird here.  Function of_get_coresight_platform_data() simply fills in
the pdata and should probably be returning an error code rather than a
pointer.  If of_get_coresight_platform_data() returns 0 then pdata is returned.

Mathieu

> +
> +	return ERR_PTR(-ENOENT);
> +}
> +EXPORT_SYMBOL_GPL(coresight_get_platform_data);
> diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
> index 8bbb008..7eb3bf7 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator.c
> @@ -177,15 +177,12 @@ static int replicator_probe(struct device *dev, struct resource *res)
>  	struct coresight_platform_data *pdata = NULL;
>  	struct replicator_drvdata *drvdata;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = dev->of_node;
>  	void __iomem *base;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -		dev->platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
> +	dev->platform_data = pdata;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
> @@ -213,7 +210,6 @@ static int replicator_probe(struct device *dev, struct resource *res)
>  	}
>  
>  	dev_set_drvdata(dev, drvdata);
> -
>  	desc.type = CORESIGHT_DEV_TYPE_LINK;
>  	desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
>  	desc.ops = &replicator_cs_ops;
> diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
> index a0690be..eae0094 100644
> --- a/drivers/hwtracing/coresight/coresight-stm.c
> +++ b/drivers/hwtracing/coresight/coresight-stm.c
> @@ -809,14 +809,11 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct resource ch_res;
>  	size_t bitmap_size;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -		adev->dev.platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
> +	adev->dev.platform_data = pdata;
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
>  		return -ENOMEM;
> diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
> index c470b81..7dbdf59 100644
> --- a/drivers/hwtracing/coresight/coresight-tmc.c
> +++ b/drivers/hwtracing/coresight/coresight-tmc.c
> @@ -395,16 +395,13 @@ static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct tmc_drvdata *drvdata;
>  	struct resource *res = &adev->res;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata)) {
> -			ret = PTR_ERR(pdata);
> -			goto out;
> -		}
> -		adev->dev.platform_data = pdata;
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata)) {
> +		ret = PTR_ERR(pdata);
> +		goto out;
>  	}
> +	adev->dev.platform_data = pdata;
>  
>  	ret = -ENOMEM;
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
> diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
> index 96af7d5..eea7fd1 100644
> --- a/drivers/hwtracing/coresight/coresight-tpiu.c
> +++ b/drivers/hwtracing/coresight/coresight-tpiu.c
> @@ -120,14 +120,11 @@ static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
>  	struct tpiu_drvdata *drvdata;
>  	struct resource *res = &adev->res;
>  	struct coresight_desc desc = { 0 };
> -	struct device_node *np = adev->dev.of_node;
>  
> -	if (np) {
> -		pdata = of_get_coresight_platform_data(dev, np);
> -		if (IS_ERR(pdata))
> -			return PTR_ERR(pdata);
> -		adev->dev.platform_data = pdata;
> -	}
> +	pdata = coresight_get_platform_data(dev);
> +	if (IS_ERR(pdata))
> +		return PTR_ERR(pdata);
> +	dev->platform_data = pdata;
>  
>  	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>  	if (!drvdata)
> diff --git a/include/linux/coresight.h b/include/linux/coresight.h
> index 7b87965..5b29255 100644
> --- a/include/linux/coresight.h
> +++ b/include/linux/coresight.h
> @@ -293,14 +293,11 @@ static inline void coresight_disclaim_device_unlocked(void __iomem *base) {}
>  
>  #ifdef CONFIG_OF
>  extern int of_coresight_get_cpu(const struct device_node *node);
> -extern struct coresight_platform_data *
> -of_get_coresight_platform_data(struct device *dev,
> -			       const struct device_node *node);
>  #else
>  static inline int of_coresight_get_cpu(const struct device_node *node)
>  { return 0; }
> -static inline struct coresight_platform_data *of_get_coresight_platform_data(
> -	struct device *dev, const struct device_node *node) { return NULL; }
>  #endif
>  
> +struct coresight_platform_data *coresight_get_platform_data(struct device *dev);
> +
>  #endif
> -- 
> 2.7.4
>
Suzuki K Poulose April 23, 2019, 9:43 a.m. UTC | #2
On 04/22/2019 07:09 PM, Mathieu Poirier wrote:
> Hi Suzuki,
> 
> On Mon, Apr 15, 2019 at 05:04:02PM +0100, Suzuki K Poulose wrote:
>> So far we have hard coded the DT platform parsing code in
>> every driver. Introduce generic helper to parse the information
>> provided by the firmware in a platform agnostic manner, in preparation
>> for the ACPI support.
>>
>> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>> ---
>>   drivers/hwtracing/coresight/coresight-catu.c       | 13 +++-----
>>   drivers/hwtracing/coresight/coresight-etb10.c      | 11 +++----
>>   drivers/hwtracing/coresight/coresight-etm3x.c      | 12 +++-----
>>   drivers/hwtracing/coresight/coresight-etm4x.c      | 11 +++----
>>   drivers/hwtracing/coresight/coresight-funnel.c     | 11 +++----
>>   drivers/hwtracing/coresight/coresight-platform.c   | 36 ++++++++++++++++------
>>   drivers/hwtracing/coresight/coresight-replicator.c | 12 +++-----
>>   drivers/hwtracing/coresight/coresight-stm.c        | 11 +++----
>>   drivers/hwtracing/coresight/coresight-tmc.c        | 13 +++-----
>>   drivers/hwtracing/coresight/coresight-tpiu.c       | 11 +++----
>>   include/linux/coresight.h                          |  7 ++---
>>   11 files changed, 66 insertions(+), 82 deletions(-)
>>
>> diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
>> index 14d1cf5..65b86ec 100644
>> --- a/drivers/hwtracing/coresight/coresight-catu.c
>> +++ b/drivers/hwtracing/coresight/coresight-catu.c
>> @@ -503,17 +503,14 @@ static int catu_probe(struct amba_device *adev, const struct amba_id *id)
>>   	struct coresight_desc catu_desc;
>>   	struct coresight_platform_data *pdata = NULL;
>>   	struct device *dev = &adev->dev;
>> -	struct device_node *np = dev->of_node;
>>   	void __iomem *base;
>>   
>> -	if (np) {
>> -		pdata = of_get_coresight_platform_data(dev, np);
>> -		if (IS_ERR(pdata)) {
>> -			ret = PTR_ERR(pdata);
>> -			goto out;
>> -		}
>> -		dev->platform_data = pdata;
>> +	pdata = coresight_get_platform_data(dev);
>> +	if (IS_ERR(pdata)) {
>> +		ret = PTR_ERR(pdata);
>> +		goto out;
>>   	}
>> +	dev->platform_data = pdata;
>>   
>>   	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>>   	if (!drvdata) {
>> diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
>> index 6e6e9aa..cd61b54 100644
>> --- a/drivers/hwtracing/coresight/coresight-etb10.c
>> +++ b/drivers/hwtracing/coresight/coresight-etb10.c
>> @@ -681,14 +681,11 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id)
>>   	struct etb_drvdata *drvdata;
>>   	struct resource *res = &adev->res;
>>   	struct coresight_desc desc = { 0 };
>> -	struct device_node *np = adev->dev.of_node;
>>   
>> -	if (np) {
>> -		pdata = of_get_coresight_platform_data(dev, np);
>> -		if (IS_ERR(pdata))
>> -			return PTR_ERR(pdata);
>> -		adev->dev.platform_data = pdata;
>> -	}
>> +	pdata = coresight_get_platform_data(dev);
>> +	if (IS_ERR(pdata))
>> +		return PTR_ERR(pdata);
>> +	adev->dev.platform_data = pdata;
>>   
>>   	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>>   	if (!drvdata)
>> diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
>> index fa2f141..fa2164f 100644
>> --- a/drivers/hwtracing/coresight/coresight-etm3x.c
>> +++ b/drivers/hwtracing/coresight/coresight-etm3x.c
>> @@ -790,20 +790,16 @@ static int etm_probe(struct amba_device *adev, const struct amba_id *id)
>>   	struct etm_drvdata *drvdata;
>>   	struct resource *res = &adev->res;
>>   	struct coresight_desc desc = { 0 };
>> -	struct device_node *np = adev->dev.of_node;
>>   
>>   	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>>   	if (!drvdata)
>>   		return -ENOMEM;
>>   
>> -	if (np) {
>> -		pdata = of_get_coresight_platform_data(dev, np);
>> -		if (IS_ERR(pdata))
>> -			return PTR_ERR(pdata);
>> -
>> -		adev->dev.platform_data = pdata;
>> -	}
>> +	pdata = coresight_get_platform_data(dev);
>> +	if (IS_ERR(pdata))
>> +		return PTR_ERR(pdata);
>>   
>> +	adev->dev.platform_data = pdata;
>>   	drvdata->use_cp14 = fwnode_property_read_bool(dev->fwnode, "arm,cp14");
>>   	dev_set_drvdata(dev, drvdata);
>>   
>> diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
>> index 75b923f..998b9f3 100644
>> --- a/drivers/hwtracing/coresight/coresight-etm4x.c
>> +++ b/drivers/hwtracing/coresight/coresight-etm4x.c
>> @@ -976,18 +976,15 @@ static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
>>   	struct etmv4_drvdata *drvdata;
>>   	struct resource *res = &adev->res;
>>   	struct coresight_desc desc = { 0 };
>> -	struct device_node *np = adev->dev.of_node;
>>   
>>   	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>>   	if (!drvdata)
>>   		return -ENOMEM;
>>   
>> -	if (np) {
>> -		pdata = of_get_coresight_platform_data(dev, np);
>> -		if (IS_ERR(pdata))
>> -			return PTR_ERR(pdata);
>> -		adev->dev.platform_data = pdata;
>> -	}
>> +	pdata = coresight_get_platform_data(dev);
>> +	if (IS_ERR(pdata))
>> +		return PTR_ERR(pdata);
>> +	adev->dev.platform_data = pdata;
>>   
>>   	dev_set_drvdata(dev, drvdata);
>>   
>> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
>> index 1085f31..2590744 100644
>> --- a/drivers/hwtracing/coresight/coresight-funnel.c
>> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
>> @@ -185,14 +185,11 @@ static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
>>   	struct funnel_drvdata *drvdata;
>>   	struct resource *res = &adev->res;
>>   	struct coresight_desc desc = { 0 };
>> -	struct device_node *np = adev->dev.of_node;
>>   
>> -	if (np) {
>> -		pdata = of_get_coresight_platform_data(dev, np);
>> -		if (IS_ERR(pdata))
>> -			return PTR_ERR(pdata);
>> -		adev->dev.platform_data = pdata;
>> -	}
>> +	pdata = coresight_get_platform_data(dev);
>> +	if (IS_ERR(pdata))
>> +		return PTR_ERR(pdata);
>> +	adev->dev.platform_data = pdata;
>>   
>>   	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
>>   	if (!drvdata)
>> diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
>> index 4c31299..25a1838 100644
>> --- a/drivers/hwtracing/coresight/coresight-platform.c
>> +++ b/drivers/hwtracing/coresight/coresight-platform.c
>> @@ -230,23 +230,17 @@ static int of_coresight_parse_endpoint(struct device *dev,
>>   	return ret;
>>   }
>>   
>> -struct coresight_platform_data *
>> +static struct coresight_platform_data *
>>   of_get_coresight_platform_data(struct device *dev,
>> -			       const struct device_node *node)
>> +			       struct coresight_platform_data *pdata)
>>   {
>>   	int ret = 0;
>> -	struct coresight_platform_data *pdata;
>>   	struct coresight_connection *conn;
>>   	struct device_node *ep = NULL;
>>   	const struct device_node *parent = NULL;
>>   	bool legacy_binding = false;
>> +	struct device_node *node = dev->of_node;
>>   
>> -	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
>> -	if (!pdata)
>> -		return ERR_PTR(-ENOMEM);
>> -
>> -	/* Use device name as sysfs handle */
>> -	pdata->name = dev_name(dev);
>>   	pdata->cpu = of_coresight_get_cpu(node);
>>   
>>   	/* Get the number of input and output port for this component */
>> @@ -298,5 +292,27 @@ of_get_coresight_platform_data(struct device *dev,
>>   
>>   	return pdata;
>>   }
>> -EXPORT_SYMBOL_GPL(of_get_coresight_platform_data);
>>   #endif
>> +
>> +struct coresight_platform_data *
>> +coresight_get_platform_data(struct device *dev)
>> +{
>> +	struct coresight_platform_data *pdata;
>> +	struct fwnode_handle *fwnode = dev_fwnode(dev);
>> +
>> +	if (IS_ERR_OR_NULL(fwnode))
>> +		return NULL;
>> +
>> +	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
>> +	if (!pdata)
>> +		return ERR_PTR(-ENOMEM);
>> +
>> +	/* Use device name as sysfs handle */
>> +	pdata->name = dev_name(dev);
>> +
>> +	if (is_of_node(fwnode))
>> +		return of_get_coresight_platform_data(dev, pdata);
> 
> Now that I'm looking a patch 26, returning a coresight_platform_data pointer is
> a little weird here.  Function of_get_coresight_platform_data() simply fills in
> the pdata and should probably be returning an error code rather than a
> pointer.  If of_get_coresight_platform_data() returns 0 then pdata is returned.s, 

Yes, that makes sense. I will fix it.

Cheers
Suzuki

Patch
diff mbox series

diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 14d1cf5..65b86ec 100644
--- a/drivers/hwtracing/coresight/coresight-catu.c
+++ b/drivers/hwtracing/coresight/coresight-catu.c
@@ -503,17 +503,14 @@  static int catu_probe(struct amba_device *adev, const struct amba_id *id)
 	struct coresight_desc catu_desc;
 	struct coresight_platform_data *pdata = NULL;
 	struct device *dev = &adev->dev;
-	struct device_node *np = dev->of_node;
 	void __iomem *base;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata)) {
-			ret = PTR_ERR(pdata);
-			goto out;
-		}
-		dev->platform_data = pdata;
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata)) {
+		ret = PTR_ERR(pdata);
+		goto out;
 	}
+	dev->platform_data = pdata;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata) {
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 6e6e9aa..cd61b54 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -681,14 +681,11 @@  static int etb_probe(struct amba_device *adev, const struct amba_id *id)
 	struct etb_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-		adev->dev.platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+	adev->dev.platform_data = pdata;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index fa2f141..fa2164f 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -790,20 +790,16 @@  static int etm_probe(struct amba_device *adev, const struct amba_id *id)
 	struct etm_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
 		return -ENOMEM;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-
-		adev->dev.platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
 
+	adev->dev.platform_data = pdata;
 	drvdata->use_cp14 = fwnode_property_read_bool(dev->fwnode, "arm,cp14");
 	dev_set_drvdata(dev, drvdata);
 
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 75b923f..998b9f3 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -976,18 +976,15 @@  static int etm4_probe(struct amba_device *adev, const struct amba_id *id)
 	struct etmv4_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
 		return -ENOMEM;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-		adev->dev.platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+	adev->dev.platform_data = pdata;
 
 	dev_set_drvdata(dev, drvdata);
 
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index 1085f31..2590744 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -185,14 +185,11 @@  static int funnel_probe(struct amba_device *adev, const struct amba_id *id)
 	struct funnel_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-		adev->dev.platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+	adev->dev.platform_data = pdata;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index 4c31299..25a1838 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -230,23 +230,17 @@  static int of_coresight_parse_endpoint(struct device *dev,
 	return ret;
 }
 
-struct coresight_platform_data *
+static struct coresight_platform_data *
 of_get_coresight_platform_data(struct device *dev,
-			       const struct device_node *node)
+			       struct coresight_platform_data *pdata)
 {
 	int ret = 0;
-	struct coresight_platform_data *pdata;
 	struct coresight_connection *conn;
 	struct device_node *ep = NULL;
 	const struct device_node *parent = NULL;
 	bool legacy_binding = false;
+	struct device_node *node = dev->of_node;
 
-	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
-	if (!pdata)
-		return ERR_PTR(-ENOMEM);
-
-	/* Use device name as sysfs handle */
-	pdata->name = dev_name(dev);
 	pdata->cpu = of_coresight_get_cpu(node);
 
 	/* Get the number of input and output port for this component */
@@ -298,5 +292,27 @@  of_get_coresight_platform_data(struct device *dev,
 
 	return pdata;
 }
-EXPORT_SYMBOL_GPL(of_get_coresight_platform_data);
 #endif
+
+struct coresight_platform_data *
+coresight_get_platform_data(struct device *dev)
+{
+	struct coresight_platform_data *pdata;
+	struct fwnode_handle *fwnode = dev_fwnode(dev);
+
+	if (IS_ERR_OR_NULL(fwnode))
+		return NULL;
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	/* Use device name as sysfs handle */
+	pdata->name = dev_name(dev);
+
+	if (is_of_node(fwnode))
+		return of_get_coresight_platform_data(dev, pdata);
+
+	return ERR_PTR(-ENOENT);
+}
+EXPORT_SYMBOL_GPL(coresight_get_platform_data);
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 8bbb008..7eb3bf7 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -177,15 +177,12 @@  static int replicator_probe(struct device *dev, struct resource *res)
 	struct coresight_platform_data *pdata = NULL;
 	struct replicator_drvdata *drvdata;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = dev->of_node;
 	void __iomem *base;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-		dev->platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+	dev->platform_data = pdata;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
@@ -213,7 +210,6 @@  static int replicator_probe(struct device *dev, struct resource *res)
 	}
 
 	dev_set_drvdata(dev, drvdata);
-
 	desc.type = CORESIGHT_DEV_TYPE_LINK;
 	desc.subtype.link_subtype = CORESIGHT_DEV_SUBTYPE_LINK_SPLIT;
 	desc.ops = &replicator_cs_ops;
diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index a0690be..eae0094 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -809,14 +809,11 @@  static int stm_probe(struct amba_device *adev, const struct amba_id *id)
 	struct resource ch_res;
 	size_t bitmap_size;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-		adev->dev.platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+	adev->dev.platform_data = pdata;
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
 		return -ENOMEM;
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index c470b81..7dbdf59 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -395,16 +395,13 @@  static int tmc_probe(struct amba_device *adev, const struct amba_id *id)
 	struct tmc_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata)) {
-			ret = PTR_ERR(pdata);
-			goto out;
-		}
-		adev->dev.platform_data = pdata;
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata)) {
+		ret = PTR_ERR(pdata);
+		goto out;
 	}
+	adev->dev.platform_data = pdata;
 
 	ret = -ENOMEM;
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
diff --git a/drivers/hwtracing/coresight/coresight-tpiu.c b/drivers/hwtracing/coresight/coresight-tpiu.c
index 96af7d5..eea7fd1 100644
--- a/drivers/hwtracing/coresight/coresight-tpiu.c
+++ b/drivers/hwtracing/coresight/coresight-tpiu.c
@@ -120,14 +120,11 @@  static int tpiu_probe(struct amba_device *adev, const struct amba_id *id)
 	struct tpiu_drvdata *drvdata;
 	struct resource *res = &adev->res;
 	struct coresight_desc desc = { 0 };
-	struct device_node *np = adev->dev.of_node;
 
-	if (np) {
-		pdata = of_get_coresight_platform_data(dev, np);
-		if (IS_ERR(pdata))
-			return PTR_ERR(pdata);
-		adev->dev.platform_data = pdata;
-	}
+	pdata = coresight_get_platform_data(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+	dev->platform_data = pdata;
 
 	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
 	if (!drvdata)
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 7b87965..5b29255 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -293,14 +293,11 @@  static inline void coresight_disclaim_device_unlocked(void __iomem *base) {}
 
 #ifdef CONFIG_OF
 extern int of_coresight_get_cpu(const struct device_node *node);
-extern struct coresight_platform_data *
-of_get_coresight_platform_data(struct device *dev,
-			       const struct device_node *node);
 #else
 static inline int of_coresight_get_cpu(const struct device_node *node)
 { return 0; }
-static inline struct coresight_platform_data *of_get_coresight_platform_data(
-	struct device *dev, const struct device_node *node) { return NULL; }
 #endif
 
+struct coresight_platform_data *coresight_get_platform_data(struct device *dev);
+
 #endif