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PM / devfreq: exynos5: introduce struct busfreq_ppmu_data

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This is a preparation for making more PPMU code common for
EXYNOS devfreq drivers.

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: MyungJoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2014-03-21 18:31:45 +01:00 committed by MyungJoo Ham
parent f414527089
commit a94f6b4a6f
1 changed files with 45 additions and 27 deletions
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72
drivers/devfreq/exynos/exynos5_bus.c
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@ -46,11 +46,16 @@ enum exynos_ppmu_list {
PPMU_END, PPMU_END,
}; };
struct busfreq_ppmu_data {
struct exynos_ppmu *ppmu;
int ppmu_end;
};
struct busfreq_data_int { struct busfreq_data_int {
struct device *dev; struct device *dev;
struct devfreq *devfreq; struct devfreq *devfreq;
struct regulator *vdd_int; struct regulator *vdd_int;
struct exynos_ppmu ppmu[PPMU_END]; struct busfreq_ppmu_data ppmu_data;
unsigned long curr_freq; unsigned long curr_freq;
bool disabled; bool disabled;
@ -75,47 +80,47 @@ static struct int_bus_opp_table exynos5_int_opp_table[] = {
{0, 0, 0}, {0, 0, 0},
}; };
static void busfreq_mon_reset(struct busfreq_data_int *data) static void busfreq_mon_reset(struct busfreq_ppmu_data *ppmu_data)
{ {
unsigned int i; unsigned int i;
for (i = PPMU_RIGHT; i < PPMU_END; i++) { for (i = 0; i < ppmu_data->ppmu_end; i++) {
void __iomem *ppmu_base = data->ppmu[i].hw_base; void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
/* Reset the performance and cycle counters */ /* Reset the performance and cycle counters */
exynos_ppmu_reset(ppmu_base); exynos_ppmu_reset(ppmu_base);
/* Setup count registers to monitor read/write transactions */ /* 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, 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); exynos_ppmu_start(ppmu_base);
} }
} }
static void exynos5_read_ppmu(struct busfreq_data_int *data) static void exynos5_read_ppmu(struct busfreq_ppmu_data *ppmu_data)
{ {
int i, j; int i, j;
for (i = PPMU_RIGHT; i < PPMU_END; i++) { for (i = 0; i < ppmu_data->ppmu_end; i++) {
void __iomem *ppmu_base = data->ppmu[i].hw_base; void __iomem *ppmu_base = ppmu_data->ppmu[i].hw_base;
exynos_ppmu_stop(ppmu_base); exynos_ppmu_stop(ppmu_base);
/* Update local data from PPMU */ /* 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++) { for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
if (data->ppmu[i].event[j] == 0) if (ppmu_data->ppmu[i].event[j] == 0)
data->ppmu[i].count[j] = 0; ppmu_data->ppmu[i].count[j] = 0;
else else
data->ppmu[i].count[j] = ppmu_data->ppmu[i].count[j] =
exynos_ppmu_read(ppmu_base, j); exynos_ppmu_read(ppmu_base, j);
} }
} }
busfreq_mon_reset(data); busfreq_mon_reset(ppmu_data);
} }
static int exynos5_int_setvolt(struct busfreq_data_int *data, static int exynos5_int_setvolt(struct busfreq_data_int *data,
@ -185,16 +190,16 @@ static int exynos5_busfreq_int_target(struct device *dev, unsigned long *_freq,
return err; return err;
} }
static int exynos5_get_busier_dmc(struct busfreq_data_int *data) static int exynos5_get_busier_dmc(struct busfreq_ppmu_data *ppmu_data)
{ {
int i, j; int i, j;
int busy = 0; int busy = 0;
unsigned int temp = 0; unsigned int temp = 0;
for (i = PPMU_RIGHT; i < PPMU_END; i++) { for (i = 0; i < ppmu_data->ppmu_end; i++) {
for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) { for (j = PPMU_PMNCNT0; j < PPMU_PMNCNT_MAX; j++) {
if (data->ppmu[i].count[j] > temp) { if (ppmu_data->ppmu[i].count[j] > temp) {
temp = data->ppmu[i].count[j]; temp = ppmu_data->ppmu[i].count[j];
busy = i; busy = i;
} }
} }
@ -209,17 +214,18 @@ static int exynos5_int_get_dev_status(struct device *dev,
struct platform_device *pdev = container_of(dev, struct platform_device, struct platform_device *pdev = container_of(dev, struct platform_device,
dev); dev);
struct busfreq_data_int *data = platform_get_drvdata(pdev); struct busfreq_data_int *data = platform_get_drvdata(pdev);
struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
int busier_dmc; int busier_dmc;
exynos5_read_ppmu(data); exynos5_read_ppmu(ppmu_data);
busier_dmc = exynos5_get_busier_dmc(data); busier_dmc = exynos5_get_busier_dmc(ppmu_data);
stat->current_frequency = data->curr_freq; stat->current_frequency = data->curr_freq;
/* Number of cycles spent on memory access */ /* Number of cycles spent on memory access */
stat->busy_time = data->ppmu[busier_dmc].count[PPMU_PMNCNT3]; stat->busy_time = ppmu_data->ppmu[busier_dmc].count[PPMU_PMNCNT3];
stat->busy_time *= 100 / INT_BUS_SATURATION_RATIO; stat->busy_time *= 100 / INT_BUS_SATURATION_RATIO;
stat->total_time = data->ppmu[busier_dmc].ccnt; stat->total_time = ppmu_data->ppmu[busier_dmc].ccnt;
return 0; return 0;
} }
@ -315,6 +321,7 @@ static int exynos5_busfreq_int_pm_notifier_event(struct notifier_block *this,
static int exynos5_busfreq_int_probe(struct platform_device *pdev) static int exynos5_busfreq_int_probe(struct platform_device *pdev)
{ {
struct busfreq_data_int *data; struct busfreq_data_int *data;
struct busfreq_ppmu_data *ppmu_data;
struct dev_pm_opp *opp; struct dev_pm_opp *opp;
struct device *dev = &pdev->dev; struct device *dev = &pdev->dev;
struct device_node *np; struct device_node *np;
@ -330,16 +337,26 @@ static int exynos5_busfreq_int_probe(struct platform_device *pdev)
return -ENOMEM; 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;
}
np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-ppmu"); np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-ppmu");
if (np == NULL) { if (np == NULL) {
pr_err("Unable to find PPMU node\n"); pr_err("Unable to find PPMU node\n");
return -ENOENT; return -ENOENT;
} }
for (i = PPMU_RIGHT; i < PPMU_END; i++) { for (i = 0; i < ppmu_data->ppmu_end; i++) {
/* map PPMU memory region */ /* map PPMU memory region */
data->ppmu[i].hw_base = of_iomap(np, i); ppmu_data->ppmu[i].hw_base = of_iomap(np, i);
if (data->ppmu[i].hw_base == NULL) { if (ppmu_data->ppmu[i].hw_base == NULL) {
dev_err(&pdev->dev, "failed to map memory region\n"); dev_err(&pdev->dev, "failed to map memory region\n");
return -ENOMEM; return -ENOMEM;
} }
@ -390,7 +407,7 @@ static int exynos5_busfreq_int_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data); platform_set_drvdata(pdev, data);
busfreq_mon_reset(data); busfreq_mon_reset(ppmu_data);
data->devfreq = devfreq_add_device(dev, &exynos5_devfreq_int_profile, data->devfreq = devfreq_add_device(dev, &exynos5_devfreq_int_profile,
"simple_ondemand", NULL); "simple_ondemand", NULL);
@ -435,8 +452,9 @@ static int exynos5_busfreq_int_resume(struct device *dev)
struct platform_device *pdev = container_of(dev, struct platform_device, struct platform_device *pdev = container_of(dev, struct platform_device,
dev); dev);
struct busfreq_data_int *data = platform_get_drvdata(pdev); struct busfreq_data_int *data = platform_get_drvdata(pdev);
struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
busfreq_mon_reset(data); busfreq_mon_reset(ppmu_data);
return 0; return 0;
} }
static const struct dev_pm_ops exynos5_busfreq_int_pm = { static const struct dev_pm_ops exynos5_busfreq_int_pm = {