[PATCH v2 19/36] coresight: Introduce generic platform data helper

From: Suzuki K Poulose
Date: Mon Apr 15 2019 - 12:06:26 EST

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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@xxxxxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
---
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);
+
+ 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

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