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authorRobin Murphy <robin.murphy@arm.com>2018-02-15 19:51:45 +0100
committerArnd Bergmann <arnd@arndb.de>2018-03-06 17:27:09 +0100
commit32837954db462ecc28051923109ef6e4a221f2b2 (patch)
tree5074da12f055deb00b313ee2d4de6e765a0faa5a /drivers/perf
parentbus/arm-cci: Streamline devicetree handling a bit (diff)
downloadlinux-32837954db462ecc28051923109ef6e4a221f2b2.tar.xz
linux-32837954db462ecc28051923109ef6e4a221f2b2.zip
perf/arm-cci: Clean up model discovery
Since I am the self-appointed of_device_get_match_data() police, it's only right that I should clean up this driver while I'm otherwise touching it. This also reveals that we're passing around a struct platform_device in places where we only ever care about its regular device, so straighten that out in the process. Acked-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'drivers/perf')
-rw-r--r--drivers/perf/arm-cci.c40
1 files changed, 16 insertions, 24 deletions
diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c
index 242623fbce1f..336f1455cf96 100644
--- a/drivers/perf/arm-cci.c
+++ b/drivers/perf/arm-cci.c
@@ -8,6 +8,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/of_address.h>
+#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/perf_event.h>
@@ -371,14 +372,14 @@ static int probe_cci400_revision(void)
return CCI400_R1;
}
-static const struct cci_pmu_model *probe_cci_model(struct platform_device *pdev)
+static const struct cci_pmu_model *probe_cci_model(void)
{
if (platform_has_secure_cci_access())
return &cci_pmu_models[probe_cci400_revision()];
return NULL;
}
#else /* !CONFIG_ARM_CCI400_PMU */
-static inline struct cci_pmu_model *probe_cci_model(struct platform_device *pdev)
+static inline struct cci_pmu_model *probe_cci_model(void)
{
return NULL;
}
@@ -1589,20 +1590,6 @@ static const struct of_device_id arm_cci_pmu_matches[] = {
{},
};
-static inline const struct cci_pmu_model *get_cci_model(struct platform_device *pdev)
-{
- const struct of_device_id *match = of_match_node(arm_cci_pmu_matches,
- pdev->dev.of_node);
- if (!match)
- return NULL;
- if (match->data)
- return match->data;
-
- dev_warn(&pdev->dev, "DEPRECATED compatible property,"
- "requires secure access to CCI registers");
- return probe_cci_model(pdev);
-}
-
static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
{
int i;
@@ -1614,7 +1601,7 @@ static bool is_duplicate_irq(int irq, int *irqs, int nr_irqs)
return false;
}
-static struct cci_pmu *cci_pmu_alloc(struct platform_device *pdev)
+static struct cci_pmu *cci_pmu_alloc(struct device *dev)
{
struct cci_pmu *cci_pmu;
const struct cci_pmu_model *model;
@@ -1624,28 +1611,33 @@ static struct cci_pmu *cci_pmu_alloc(struct platform_device *pdev)
* them explicitly on an error, as it would end up in driver
* detach.
*/
- model = get_cci_model(pdev);
+ model = of_device_get_match_data(dev);
+ if (!model) {
+ dev_warn(dev,
+ "DEPRECATED compatible property, requires secure access to CCI registers");
+ model = probe_cci_model();
+ }
if (!model) {
- dev_warn(&pdev->dev, "CCI PMU version not supported\n");
+ dev_warn(dev, "CCI PMU version not supported\n");
return ERR_PTR(-ENODEV);
}
- cci_pmu = devm_kzalloc(&pdev->dev, sizeof(*cci_pmu), GFP_KERNEL);
+ cci_pmu = devm_kzalloc(dev, sizeof(*cci_pmu), GFP_KERNEL);
if (!cci_pmu)
return ERR_PTR(-ENOMEM);
cci_pmu->model = model;
- cci_pmu->irqs = devm_kcalloc(&pdev->dev, CCI_PMU_MAX_HW_CNTRS(model),
+ cci_pmu->irqs = devm_kcalloc(dev, CCI_PMU_MAX_HW_CNTRS(model),
sizeof(*cci_pmu->irqs), GFP_KERNEL);
if (!cci_pmu->irqs)
return ERR_PTR(-ENOMEM);
- cci_pmu->hw_events.events = devm_kcalloc(&pdev->dev,
+ cci_pmu->hw_events.events = devm_kcalloc(dev,
CCI_PMU_MAX_HW_CNTRS(model),
sizeof(*cci_pmu->hw_events.events),
GFP_KERNEL);
if (!cci_pmu->hw_events.events)
return ERR_PTR(-ENOMEM);
- cci_pmu->hw_events.used_mask = devm_kcalloc(&pdev->dev,
+ cci_pmu->hw_events.used_mask = devm_kcalloc(dev,
BITS_TO_LONGS(CCI_PMU_MAX_HW_CNTRS(model)),
sizeof(*cci_pmu->hw_events.used_mask),
GFP_KERNEL);
@@ -1661,7 +1653,7 @@ static int cci_pmu_probe(struct platform_device *pdev)
struct cci_pmu *cci_pmu;
int i, ret, irq;
- cci_pmu = cci_pmu_alloc(pdev);
+ cci_pmu = cci_pmu_alloc(&pdev->dev);
if (IS_ERR(cci_pmu))
return PTR_ERR(cci_pmu);