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| author |   Suzuki K Poulose <suzuki.poulose@arm.com> | 2019-06-19 13:52:55 -0600 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-20 07:56:11 +0200 |
| commit | 91824db2ea2d2bacacd54de55a7faba10c63b166 (patch) | |
| tree | 684c6832e96f83f1f568b6f5ac3b59ec52b9bfa4 /drivers/hwtracing | |
| parent | coresight: Introduce generic platform data helper (diff) | |
| download | linux-dev-91824db2ea2d2bacacd54de55a7faba10c63b166.tar.xz linux-dev-91824db2ea2d2bacacd54de55a7faba10c63b166.zip | |
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.c | 3 | ||||
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-platform.c | 18 |
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); |