Merge "coresight-dummy: add support for dummy sink devices" into msm-4.9 (0ea3f40d) · Commits · e / devices / android_kernel_fairphone_FP3

Documentation/devicetree/bindings/arm/coresight.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -87,6 +87,8 @@ its hardware characteristcs.
		* Additional required property for coresight-dummy devices:
		* qcom,dummy-source: Configure the device as source.

		* qcom,dummy-sink: Configure the device as sink.

		* Optional properties for all components:
		* reg-names: names corresponding to each reg property value.

drivers/hwtracing/coresight/coresight-dummy.c

+27 −0

Original line number	Diff line number	Diff line
		@@ -14,6 +14,7 @@
		#include <linux/module.h>
		#include <linux/platform_device.h>
		#include <linux/coresight.h>
		#include <linux/of.h>

		#define DUMMY_TRACE_ID_START 256

		@@ -41,6 +42,22 @@ static void dummy_source_disable(struct coresight_device *csdev,
		dev_info(drvdata->dev, "Dummy source disabled\n");
		}

		static int dummy_sink_enable(struct coresight_device *csdev, u32 mode)
		{
		struct dummy_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);

		dev_info(drvdata->dev, "Dummy sink enabled\n");

		return 0;
		}

		static void dummy_sink_disable(struct coresight_device *csdev)
		{
		struct dummy_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);

		dev_info(drvdata->dev, "Dummy sink disabled\n");
		}

		static int dummy_trace_id(struct coresight_device *csdev)
		{
		struct dummy_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent);
		@@ -54,8 +71,14 @@ static const struct coresight_ops_source dummy_source_ops = {
		.disable = dummy_source_disable,
		};

		static const struct coresight_ops_sink dummy_sink_ops = {
		.enable = dummy_sink_enable,
		.disable = dummy_sink_disable,
		};

		static const struct coresight_ops dummy_cs_ops = {
		.source_ops = &dummy_source_ops,
		.sink_ops = &dummy_sink_ops,
		};

		static int dummy_probe(struct platform_device *pdev)
		@@ -88,6 +111,10 @@ static int dummy_probe(struct platform_device *pdev)
		desc->type = CORESIGHT_DEV_TYPE_SOURCE;
		desc->subtype.source_subtype =
		CORESIGHT_DEV_SUBTYPE_SOURCE_PROC;
		} else if (of_property_read_bool(pdev->dev.of_node,
		"qcom,dummy-sink")) {
		desc->type = CORESIGHT_DEV_TYPE_SINK;
		desc->subtype.sink_subtype = CORESIGHT_DEV_SUBTYPE_SINK_BUFFER;
		} else {
		dev_info(dev, "Device type not set.\n");
		return -EINVAL;