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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>
This commit is contained in:
Robin Murphy 2018-02-15 18:51:45 +00:00 committed by Arnd Bergmann
parent 3ee5e821f3
commit 32837954db
1 changed files with 16 additions and 24 deletions
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40
drivers/perf/arm-cci.c
View File

@ -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(&pdev->dev, "CCI PMU version not supported\n");
dev_warn(dev,
"DEPRECATED compatible property, requires secure access to CCI registers");
model = probe_cci_model();
}
if (!model) {
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);