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Date: Fri, 21 Mar 2014 18:31:45 +0100
From: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
To: cw00.choi@...sung.com, myungjoo.ham@...sung.com
Cc: kyungmin.park@...sung.com, rafael.j.wysocki@...el.com,
t.figa@...sung.com, linux-samsung-soc@...r.kernel.org,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
b.zolnierkie@...sung.com
Subject: [PATCH 3/4] devfreq: exynos5: introduce struct busfreq_ppmu_data
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@...sung.com>
---
drivers/devfreq/exynos/exynos5_bus.c | 72 ++++++++++++++++++++++--------------
1 file changed, 45 insertions(+), 27 deletions(-)
diff --git a/drivers/devfreq/exynos/exynos5_bus.c b/drivers/devfreq/exynos/exynos5_bus.c
index af6213f..b8ab32a 100644
--- a/drivers/devfreq/exynos/exynos5_bus.c
+++ b/drivers/devfreq/exynos/exynos5_bus.c
@@ -46,11 +46,16 @@ enum exynos_ppmu_list {
PPMU_END,
};
+struct busfreq_ppmu_data {
+ struct exynos_ppmu *ppmu;
+ int ppmu_end;
+};
+
struct busfreq_data_int {
struct device *dev;
struct devfreq *devfreq;
struct regulator *vdd_int;
- struct exynos_ppmu ppmu[PPMU_END];
+ struct busfreq_ppmu_data ppmu_data;
unsigned long curr_freq;
bool disabled;
@@ -75,47 +80,47 @@ static struct int_bus_opp_table exynos5_int_opp_table[] = {
{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;
- for (i = PPMU_RIGHT; 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 exynos5_read_ppmu(struct busfreq_data_int *data)
+static void exynos5_read_ppmu(struct busfreq_ppmu_data *ppmu_data)
{
int i, j;
- for (i = PPMU_RIGHT; 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 exynos5_int_setvolt(struct busfreq_data_int *data,
@@ -185,16 +190,16 @@ out:
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 busy = 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++) {
- 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;
}
}
@@ -209,17 +214,18 @@ static int exynos5_int_get_dev_status(struct device *dev,
struct platform_device *pdev = container_of(dev, struct platform_device,
dev);
struct busfreq_data_int *data = platform_get_drvdata(pdev);
+ struct busfreq_ppmu_data *ppmu_data = &data->ppmu_data;
int busier_dmc;
- exynos5_read_ppmu(data);
- busier_dmc = exynos5_get_busier_dmc(data);
+ exynos5_read_ppmu(ppmu_data);
+ busier_dmc = exynos5_get_busier_dmc(ppmu_data);
stat->current_frequency = data->curr_freq;
/* 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->total_time = data->ppmu[busier_dmc].ccnt;
+ stat->total_time = ppmu_data->ppmu[busier_dmc].ccnt;
return 0;
}
@@ -315,6 +321,7 @@ unlock:
static int exynos5_busfreq_int_probe(struct platform_device *pdev)
{
struct busfreq_data_int *data;
+ struct busfreq_ppmu_data *ppmu_data;
struct dev_pm_opp *opp;
struct device *dev = &pdev->dev;
struct device_node *np;
@@ -330,16 +337,26 @@ static int exynos5_busfreq_int_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;
+ }
+
np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-ppmu");
if (np == NULL) {
pr_err("Unable to find PPMU node\n");
return -ENOENT;
}
- for (i = PPMU_RIGHT; i < PPMU_END; i++) {
+ for (i = 0; i < ppmu_data->ppmu_end; i++) {
/* map PPMU memory region */
- data->ppmu[i].hw_base = of_iomap(np, i);
- if (data->ppmu[i].hw_base == NULL) {
+ ppmu_data->ppmu[i].hw_base = of_iomap(np, i);
+ if (ppmu_data->ppmu[i].hw_base == NULL) {
dev_err(&pdev->dev, "failed to map memory region\n");
return -ENOMEM;
}
@@ -390,7 +407,7 @@ static int exynos5_busfreq_int_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);
- busfreq_mon_reset(data);
+ busfreq_mon_reset(ppmu_data);
data->devfreq = devfreq_add_device(dev, &exynos5_devfreq_int_profile,
"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,
dev);
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;
}
static const struct dev_pm_ops exynos5_busfreq_int_pm = {
--
1.8.2.3
--
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