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Subject[PATCH 18/25] coresight: Introduce generic platform data helper
Date
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 | 65 +++++++++++++---------
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, 80 insertions(+), 97 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-catu.c b/drivers/hwtracing/coresight/coresight-catu.c
index 671a05a..4595c67 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 a471cbd..e4175849 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c
@@ -688,14 +688,11 @@ 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 7137f06..b101464 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -788,20 +788,16 @@ 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 8d5ee3b..bfc23ab 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -974,18 +974,15 @@ 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 514cc2b..693e3f5 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -17,6 +17,20 @@
#include <linux/cpumask.h>
#include <asm/smp_plat.h>

+static int coresight_alloc_conns(struct device *dev,
+ struct coresight_platform_data *pdata)
+{
+ if (pdata->nr_outport) {
+ pdata->conns = devm_kzalloc(dev, pdata->nr_outport *
+ sizeof(*pdata->conns),
+ GFP_KERNEL);
+ if (!pdata->conns)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
#ifdef CONFIG_OF
static int of_dev_node_match(struct device *dev, void *data)
{
@@ -133,20 +147,6 @@ static void of_coresight_get_ports(const struct device_node *node,
}
}

-static int of_coresight_alloc_memory(struct device *dev,
- struct coresight_platform_data *pdata)
-{
- if (pdata->nr_outport) {
- pdata->conns = devm_kzalloc(dev, pdata->nr_outport *
- sizeof(*pdata->conns),
- GFP_KERNEL);
- if (!pdata->conns)
- return -ENOMEM;
- }
-
- return 0;
-}
-
int of_coresight_get_cpu(const struct device_node *node)
{
int cpu;
@@ -226,23 +226,17 @@ 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 */
@@ -252,7 +246,7 @@ of_get_coresight_platform_data(struct device *dev,
if (!pdata->nr_outport)
return pdata;

- ret = of_coresight_alloc_memory(dev, pdata);
+ ret = coresight_alloc_conns(dev, pdata);
if (ret)
return ERR_PTR(ret);

@@ -294,5 +288,26 @@ 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;
+
+ if (IS_ERR_OR_NULL(dev->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(dev->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 eb96bba..6514586 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)
size_t bitmap_size;
struct coresight_desc desc = { 0 };
struct coresight_device *csdev;
- 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 7ce3427..147ab17 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -394,16 +394,13 @@ 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 9763721..18a749a 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 resource *res = &adev->res;
struct coresight_desc desc = { 0 };
struct coresight_device *csdev;
- 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/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
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