Add coresight name support for custom names which will be easy to identify the device by the name.
Signed-off-by: Mao Jinlong quic_jinlmao@quicinc.com --- .../hwtracing/coresight/coresight-cti-core.c | 20 ++++++++------ drivers/hwtracing/coresight/coresight-dummy.c | 10 ++++--- .../hwtracing/coresight/coresight-platform.c | 27 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-tpdm.c | 10 ++++--- include/linux/coresight.h | 1 + 5 files changed, 53 insertions(+), 15 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-cti-core.c b/drivers/hwtracing/coresight/coresight-cti-core.c index 3999d0a2cb60..60a1e76064a9 100644 --- a/drivers/hwtracing/coresight/coresight-cti-core.c +++ b/drivers/hwtracing/coresight/coresight-cti-core.c @@ -902,14 +902,18 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id) /* default to powered - could change on PM notifications */ drvdata->config.hw_powered = true;
- /* set up device name - will depend if cpu bound or otherwise */ - if (drvdata->ctidev.cpu >= 0) - cti_desc.name = devm_kasprintf(dev, GFP_KERNEL, "cti_cpu%d", - drvdata->ctidev.cpu); - else - cti_desc.name = coresight_alloc_device_name(&cti_sys_devs, dev); - if (!cti_desc.name) - return -ENOMEM; + cti_desc.name = coresight_get_device_name(dev); + if (!cti_desc.name) { + /* set up device name - will depend if cpu bound or otherwise */ + if (drvdata->ctidev.cpu >= 0) + cti_desc.name = devm_kasprintf(dev, GFP_KERNEL, "cti_cpu%d", + drvdata->ctidev.cpu); + else { + cti_desc.name = coresight_alloc_device_name(&cti_sys_devs, dev); + if (!cti_desc.name) + return -ENOMEM; + } + }
/* setup CPU power management handling for CPU bound CTI devices. */ ret = cti_pm_setup(drvdata); diff --git a/drivers/hwtracing/coresight/coresight-dummy.c b/drivers/hwtracing/coresight/coresight-dummy.c index e4deafae7bc2..b19cd400df79 100644 --- a/drivers/hwtracing/coresight/coresight-dummy.c +++ b/drivers/hwtracing/coresight/coresight-dummy.c @@ -76,10 +76,12 @@ static int dummy_probe(struct platform_device *pdev) struct coresight_desc desc = { 0 };
if (of_device_is_compatible(node, "arm,coresight-dummy-source")) { - - desc.name = coresight_alloc_device_name(&source_devs, dev); - if (!desc.name) - return -ENOMEM; + desc.name = coresight_get_device_name(dev); + if (!desc.name) { + desc.name = coresight_alloc_device_name(&source_devs, dev); + if (!desc.name) + return -ENOMEM; + }
desc.type = CORESIGHT_DEV_TYPE_SOURCE; desc.subtype.source_subtype = diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c index 9d550f5697fa..284aa22a06b7 100644 --- a/drivers/hwtracing/coresight/coresight-platform.c +++ b/drivers/hwtracing/coresight/coresight-platform.c @@ -183,6 +183,18 @@ static int of_coresight_get_cpu(struct device *dev) return cpu; }
+static const char *of_coresight_get_device_name(struct device *dev) +{ + const char *name = NULL; + + if (!dev->of_node) + return NULL; + + of_property_read_string(dev->of_node, "coresight-name", &name); + + return name; +} + /* * of_coresight_parse_endpoint : Parse the given output endpoint @ep * and fill the connection information in @pdata->out_conns @@ -315,6 +327,12 @@ static inline int of_coresight_get_cpu(struct device *dev) { return -ENODEV; } + +static inline const char *of_coresight_get_device_name(struct device *dev) +{ + return NULL; +} + #endif
#ifdef CONFIG_ACPI @@ -794,6 +812,15 @@ int coresight_get_cpu(struct device *dev) } EXPORT_SYMBOL_GPL(coresight_get_cpu);
+const char *coresight_get_device_name(struct device *dev) +{ + if (is_of_node(dev->fwnode)) + return of_coresight_get_device_name(dev); + else + return NULL; +} +EXPORT_SYMBOL_GPL(coresight_get_device_name); + struct coresight_platform_data * coresight_get_platform_data(struct device *dev) { diff --git a/drivers/hwtracing/coresight/coresight-tpdm.c b/drivers/hwtracing/coresight/coresight-tpdm.c index f4854af0431e..7735ff18c48e 100644 --- a/drivers/hwtracing/coresight/coresight-tpdm.c +++ b/drivers/hwtracing/coresight/coresight-tpdm.c @@ -201,9 +201,13 @@ static int tpdm_probe(struct amba_device *adev, const struct amba_id *id) drvdata->base = base;
/* Set up coresight component description */ - desc.name = coresight_alloc_device_name(&tpdm_devs, dev); - if (!desc.name) - return -ENOMEM; + desc.name = coresight_get_device_name(dev); + if (!desc.name) { + desc.name = coresight_alloc_device_name(&tpdm_devs, dev); + if (!desc.name) + return -ENOMEM; + } + desc.type = CORESIGHT_DEV_TYPE_SOURCE; desc.subtype.source_subtype = CORESIGHT_DEV_SUBTYPE_SOURCE_OTHERS; desc.ops = &tpdm_cs_ops; diff --git a/include/linux/coresight.h b/include/linux/coresight.h index a269fffaf991..caa17c8af865 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -675,6 +675,7 @@ static inline void coresight_write64(struct coresight_device *csdev, u64 val, u3 #endif /* IS_ENABLED(CONFIG_CORESIGHT) */
extern int coresight_get_cpu(struct device *dev); +extern const char *coresight_get_device_name(struct device *dev);
struct coresight_platform_data *coresight_get_platform_data(struct device *dev); struct coresight_connection *