diff options
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/exynos/exynos4_bus.c | 74 |
1 files changed, 46 insertions, 28 deletions
diff --git a/drivers/devfreq/exynos/exynos4_bus.c b/drivers/devfreq/exynos/exynos4_bus.c index 228c658c0e8c..d99ef9e80517 100644 --- a/drivers/devfreq/exynos/exynos4_bus.c +++ b/drivers/devfreq/exynos/exynos4_bus.c @@ -75,6 +75,11 @@ struct busfreq_opp_info { unsigned long volt; }; +struct busfreq_ppmu_data { + struct exynos_ppmu *ppmu; + int ppmu_end; +}; + struct busfreq_data { enum exynos4_busf_type type; struct device *dev; @@ -83,7 +88,7 @@ struct busfreq_data { struct regulator *vdd_int; struct regulator *vdd_mif; /* Exynos4412/4212 only */ struct busfreq_opp_info curr_oppinfo; - struct exynos_ppmu ppmu[PPMU_END]; + struct busfreq_ppmu_data ppmu_data; struct notifier_block pm_notifier; struct mutex lock; @@ -510,47 +515,47 @@ static int exynos4x12_set_busclk(struct busfreq_data *data, return 0; } -static void busfreq_mon_reset(struct busfreq_data *data) +static void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data) { unsigned int i; - for (i = 0; i < PPMU_END; i++) { - void __iomem *ppmu_base = data->ppmu[i].hw_base; + for (i = 0; i < ppmu_data->ppmu_end; i++) { + void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base; /* Reset the performance and cycle counters */ exynos_ppmu_reset(ppmu_base); /* Setup count registers to monitor read/write transactions */ - data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT; + ppmu_data->ppmu[i].event[PPMU_PMNCNT3] = RDWR_DATA_COUNT; exynos_ppmu_setevent(ppmu_base, PPMU_PMNCNT3, - data->ppmu[i].event[PPMU_PMNCNT3]); + ppmu_data->ppmu[i].event[PPMU_PMNCNT3]); exynos_ppmu_start(ppmu_base); } } -static void exynos4_read_ppmu(struct busfreq_data *data) +static void exynos4_read_ppmu(struct busfreq_ppmu_data *ppmu_data) { int i, j; - for (i = 0; i < PPMU_END; i++) { - void __iomem *ppmu_base = data->ppmu[i].hw_base; + for (i = 0; i < ppmu_data->ppmu_end; i++) { + void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base; exynos_ppmu_stop(ppmu_base); /* Update local data from PPMU */ - data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT); + ppmu_data->ppmu[i].ccnt = __raw_readl(ppmu_base + PPMU_CCNT); for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) { - if (data->ppmu[i].event[j] == 0) - data->ppmu[i].count[j] = 0; + if (ppmu_data->ppmu[i].event[j] == 0) + ppmu_data->ppmu[i].count[j] = 0; else - data->ppmu[i].count[j] = + ppmu_data->ppmu[i].count[j] = exynos_ppmu_read(ppmu_base, j); } } - busfreq_mon_reset(data); + busfreq_mon_reset(ppmu_data); } static int exynos4x12_get_intspec(unsigned long mifclk) @@ -676,16 +681,16 @@ out: return err; } -static int exynos4_get_busier_ppmu(struct busfreq_data *data) +static int exynos4_get_busier_ppmu(struct busfreq_ppmu_data *ppmu_data) { int i, j; int busy = 0; unsigned int temp = 0; - for (i = 0; i < PPMU_END; i++) { + for (i = 0; i < ppmu_data->ppmu_end; i++) { for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) { - if (data->ppmu[i].count[j] > temp) { - temp = data->ppmu[i].count[j]; + if (ppmu_data->ppmu[i].count[j] > temp) { + temp = ppmu_data->ppmu[i].count[j]; busy = i; } } @@ -698,20 +703,21 @@ static int exynos4_bus_get_dev_status(struct device *dev, struct devfreq_dev_status *stat) { struct busfreq_data *data = dev_get_drvdata(dev); + struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data; int busier; - exynos4_read_ppmu(data); - busier = exynos4_get_busier_ppmu(data); + exynos4_read_ppmu(ppmu_data); + busier = exynos4_get_busier_ppmu(ppmu_data); stat->current_frequency = data->curr_oppinfo.rate; /* Number of cycles spent on memory access */ - stat->busy_time = data->ppmu[busier].count[PPMU_PMNCNT3]; + stat->busy_time = ppmu_data->ppmu[busier].count[PPMU_PMNCNT3]; stat->busy_time *= 100 / BUS_SATURATION_RATIO; - stat->total_time = data->ppmu[busier].ccnt; + stat->total_time = ppmu_data->ppmu[busier].ccnt; /* If the counters have overflown, retry */ - if (data->ppmu[busier].ccnt_overflow || - data->ppmu[busier].count_overflow[0]) + if (ppmu_data->ppmu[busier].ccnt_overflow || + ppmu_data->ppmu[busier].count_overflow[0]) return -EAGAIN; return 0; @@ -966,6 +972,7 @@ unlock: static int exynos4_busfreq_probe(struct platform_device *pdev) { struct busfreq_data *data; + struct busfreq_ppmu_data *ppmu_data; struct dev_pm_opp *opp; struct device *dev = &pdev->dev; int err = 0; @@ -976,9 +983,19 @@ static int exynos4_busfreq_probe(struct platform_device *pdev) return -ENOMEM; } + ppmu_data = &data->ppmu_data; + ppmu_data->ppmu_end = PPMU_END; + ppmu_data->ppmu = devm_kzalloc(dev, + sizeof(struct exynos_ppmu) * PPMU_END, + GFP_KERNEL); + if (!ppmu_data->ppmu) { + dev_err(dev, "Failed to allocate memory for exynos_ppmu\n"); + return -ENOMEM; + } + data->type = pdev->id_entry->driver_data; - data->ppmu[PPMU_DMC0].hw_base = S5P_VA_DMC0; - data->ppmu[PPMU_DMC1].hw_base = S5P_VA_DMC1; + ppmu_data->ppmu[PPMU_DMC0].hw_base = S5P_VA_DMC0; + ppmu_data->ppmu[PPMU_DMC1].hw_base = S5P_VA_DMC1; data->pm_notifier.notifier_call = exynos4_busfreq_pm_notifier_event; data->dev = dev; mutex_init(&data->lock); @@ -1037,7 +1054,7 @@ static int exynos4_busfreq_probe(struct platform_device *pdev) * Start PPMU (Performance Profiling Monitoring Unit) to check * utilization of each IP in the Exynos4 SoC. */ - busfreq_mon_reset(data); + busfreq_mon_reset(ppmu_data); /* Register opp_notifier for Exynos4 busfreq */ err = devfreq_register_opp_notifier(dev, data->devfreq); @@ -1081,8 +1098,9 @@ static int exynos4_busfreq_remove(struct platform_device *pdev) static int exynos4_busfreq_resume(struct device *dev) { struct busfreq_data *data = dev_get_drvdata(dev); + struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data; - busfreq_mon_reset(data); + busfreq_mon_reset(ppmu_data); return 0; } #endif |