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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>
This commit is contained in:
Suzuki K Poulose 2019-06-19 13:52:55 -06:00 committed by Greg Kroah-Hartman
parent f03631da4b
commit 91824db2ea
3 changed files with 15 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/hwtracing/coresight/coresight-cpu-debug.c
View File

@ -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);

18
drivers/hwtracing/coresight/coresight-platform.c
View File

@ -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);

7
include/linux/coresight.h
View File

@ -292,12 +292,7 @@ static inline void coresight_disclaim_device_unlocked(void __iomem *base) {}
#endif
#ifdef CONFIG_OF
extern int of_coresight_get_cpu(const struct device_node *node);
#else
static inline int of_coresight_get_cpu(const struct device_node *node)
{ return 0; }
#endif
extern int coresight_get_cpu(struct device *dev);
struct coresight_platform_data *coresight_get_platform_data(struct device *dev);