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authorSuzuki K Poulose <suzuki.poulose@arm.com>2019-06-19 22:52:55 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-06-20 08:56:11 +0300
commit91824db2ea2d2bacacd54de55a7faba10c63b166 (patch)
tree684c6832e96f83f1f568b6f5ac3b59ec52b9bfa4 /drivers/hwtracing
parentf03631da4be33219021323630a8cf788fd066267 (diff)
downloadlinux-91824db2ea2d2bacacd54de55a7faba10c63b166.tar.xz
coresight: Make device to CPU mapping generic
The CoreSight components ETM and CPU-Debug are always associated with CPUs. Replace the of_coresight_get_cpu() with a platform agnostic helper, in preparation to add ACPI support. Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hwtracing')
-rw-r--r--drivers/hwtracing/coresight/coresight-cpu-debug.c3
-rw-r--r--drivers/hwtracing/coresight/coresight-platform.c18
2 files changed, 14 insertions, 7 deletions
diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c
index e8819d750938..07a1367c733f 100644
--- a/drivers/hwtracing/coresight/coresight-cpu-debug.c
+++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c
@@ -572,14 +572,13 @@ static int debug_probe(struct amba_device *adev, const struct amba_id *id)
struct device *dev = &adev->dev;
struct debug_drvdata *drvdata;
struct resource *res = &adev->res;
- struct device_node *np = adev->dev.of_node;
int ret;
drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
if (!drvdata)
return -ENOMEM;
- drvdata->cpu = np ? of_coresight_get_cpu(np) : 0;
+ drvdata->cpu = coresight_get_cpu(dev);
if (per_cpu(debug_drvdata, drvdata->cpu)) {
dev_err(dev, "CPU%d drvdata has already been initialized\n",
drvdata->cpu);
diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index 5d78f4fbd97d..ba8c14635c6b 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -151,12 +151,14 @@ static void of_coresight_get_ports(const struct device_node *node,
}
}
-int of_coresight_get_cpu(const struct device_node *node)
+static int of_coresight_get_cpu(struct device *dev)
{
int cpu;
struct device_node *dn;
- dn = of_parse_phandle(node, "cpu", 0);
+ if (!dev->of_node)
+ return 0;
+ dn = of_parse_phandle(dev->of_node, "cpu", 0);
/* Affinity defaults to CPU0 */
if (!dn)
return 0;
@@ -166,7 +168,6 @@ int of_coresight_get_cpu(const struct device_node *node)
/* Affinity to CPU0 if no cpu nodes are found */
return (cpu < 0) ? 0 : cpu;
}
-EXPORT_SYMBOL_GPL(of_coresight_get_cpu);
/*
* of_coresight_parse_endpoint : Parse the given output endpoint @ep
@@ -240,8 +241,6 @@ static int of_get_coresight_platform_data(struct device *dev,
bool legacy_binding = false;
struct device_node *node = dev->of_node;
- pdata->cpu = of_coresight_get_cpu(node);
-
/* Get the number of input and output port for this component */
of_coresight_get_ports(node, &pdata->nr_inport, &pdata->nr_outport);
@@ -300,6 +299,14 @@ of_get_coresight_platform_data(struct device *dev,
}
#endif
+int coresight_get_cpu(struct device *dev)
+{
+ if (is_of_node(dev->fwnode))
+ return of_coresight_get_cpu(dev);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(coresight_get_cpu);
+
struct coresight_platform_data *
coresight_get_platform_data(struct device *dev)
{
@@ -318,6 +325,7 @@ coresight_get_platform_data(struct device *dev)
/* Use device name as sysfs handle */
pdata->name = dev_name(dev);
+ pdata->cpu = coresight_get_cpu(dev);
if (is_of_node(fwnode))
ret = of_get_coresight_platform_data(dev, pdata);