[PATCH v3 3/3] PM / devfreq: event: Change prototype of devfreq_event_get_edev_by_phandle function
Chanwoo Choi
cw00.choi at samsung.com
Tue Sep 8 06:24:47 EDT 2020
Previously, devfreq core support 'devfreq-events' property in order to get
the devfreq-event device by phandle. But, 'devfreq-events' property name is
not proper on devicetree binding because this name doesn't mean
the any h/w attribute.
The devfreq-event core hand over the rights to decide the property name
for getting the devfreq-event device on devicetree. Each devfreq-event driver
will decide the property name on devicetree binding and then pass
the their own property name to devfreq_event_get_edev_by_phandle function.
And change the prototype of devfreq_event_get_edev_count function
because of used deprecated 'devfreq-events' property.
Signed-off-by: Chanwoo Choi <cw00.choi at samsung.com>
---
drivers/devfreq/devfreq-event.c | 14 ++++++++------
drivers/devfreq/exynos-bus.c | 5 +++--
drivers/devfreq/rk3399_dmc.c | 2 +-
drivers/memory/samsung/exynos5422-dmc.c | 6 ++++--
include/linux/devfreq-event.h | 14 ++++++++++----
5 files changed, 26 insertions(+), 15 deletions(-)
diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c
index 56efbeb7851e..6765c03334bc 100644
--- a/drivers/devfreq/devfreq-event.c
+++ b/drivers/devfreq/devfreq-event.c
@@ -213,20 +213,21 @@ EXPORT_SYMBOL_GPL(devfreq_event_reset_event);
* devfreq_event_get_edev_by_phandle() - Get the devfreq-event dev from
* devicetree.
* @dev : the pointer to the given device
+ * @phandle_name: name of property holding a phandle value
* @index : the index into list of devfreq-event device
*
* Note that this function return the pointer of devfreq-event device.
*/
struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev,
- int index)
+ const char *phandle_name, int index)
{
struct device_node *node;
struct devfreq_event_dev *edev;
- if (!dev->of_node)
+ if (!dev->of_node || !phandle_name)
return ERR_PTR(-EINVAL);
- node = of_parse_phandle(dev->of_node, "devfreq-events", index);
+ node = of_parse_phandle(dev->of_node, phandle_name, index);
if (!node)
return ERR_PTR(-ENODEV);
@@ -258,19 +259,20 @@ EXPORT_SYMBOL_GPL(devfreq_event_get_edev_by_phandle);
/**
* devfreq_event_get_edev_count() - Get the count of devfreq-event dev
* @dev : the pointer to the given device
+ * @phandle_name: name of property holding a phandle value
*
* Note that this function return the count of devfreq-event devices.
*/
-int devfreq_event_get_edev_count(struct device *dev)
+int devfreq_event_get_edev_count(struct device *dev, const char *phandle_name)
{
int count;
- if (!dev->of_node) {
+ if (!dev->of_node || !phandle_name) {
dev_err(dev, "device does not have a device node entry\n");
return -EINVAL;
}
- count = of_property_count_elems_of_size(dev->of_node, "devfreq-events",
+ count = of_property_count_elems_of_size(dev->of_node, phandle_name,
sizeof(u32));
if (count < 0) {
dev_err(dev,
diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
index 58dbf51f0983..1e684a448c9e 100644
--- a/drivers/devfreq/exynos-bus.c
+++ b/drivers/devfreq/exynos-bus.c
@@ -193,7 +193,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
* Get the devfreq-event devices to get the current utilization of
* buses. This raw data will be used in devfreq ondemand governor.
*/
- count = devfreq_event_get_edev_count(dev);
+ count = devfreq_event_get_edev_count(dev, "devfreq-events");
if (count < 0) {
dev_err(dev, "failed to get the count of devfreq-event dev\n");
ret = count;
@@ -209,7 +209,8 @@ static int exynos_bus_parent_parse_of(struct device_node *np,
}
for (i = 0; i < count; i++) {
- bus->edev[i] = devfreq_event_get_edev_by_phandle(dev, i);
+ bus->edev[i] = devfreq_event_get_edev_by_phandle(dev,
+ "devfreq-events", i);
if (IS_ERR(bus->edev[i])) {
ret = -EPROBE_DEFER;
goto err_regulator;
diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c
index 027769e39f9b..2e912166a993 100644
--- a/drivers/devfreq/rk3399_dmc.c
+++ b/drivers/devfreq/rk3399_dmc.c
@@ -341,7 +341,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev)
return PTR_ERR(data->dmc_clk);
}
- data->edev = devfreq_event_get_edev_by_phandle(dev, 0);
+ data->edev = devfreq_event_get_edev_by_phandle(dev, "devfreq-events", 0);
if (IS_ERR(data->edev))
return -EPROBE_DEFER;
diff --git a/drivers/memory/samsung/exynos5422-dmc.c b/drivers/memory/samsung/exynos5422-dmc.c
index b9c7956e5031..714d1f6f077c 100644
--- a/drivers/memory/samsung/exynos5422-dmc.c
+++ b/drivers/memory/samsung/exynos5422-dmc.c
@@ -1293,7 +1293,8 @@ static int exynos5_performance_counters_init(struct exynos5_dmc *dmc)
int counters_size;
int ret, i;
- dmc->num_counters = devfreq_event_get_edev_count(dmc->dev);
+ dmc->num_counters = devfreq_event_get_edev_count(dmc->dev,
+ "devfreq-events");
if (dmc->num_counters < 0) {
dev_err(dmc->dev, "could not get devfreq-event counters\n");
return dmc->num_counters;
@@ -1306,7 +1307,8 @@ static int exynos5_performance_counters_init(struct exynos5_dmc *dmc)
for (i = 0; i < dmc->num_counters; i++) {
dmc->counter[i] =
- devfreq_event_get_edev_by_phandle(dmc->dev, i);
+ devfreq_event_get_edev_by_phandle(dmc->dev,
+ "devfreq-events", i);
if (IS_ERR_OR_NULL(dmc->counter[i]))
return -EPROBE_DEFER;
}
diff --git a/include/linux/devfreq-event.h b/include/linux/devfreq-event.h
index f14f17f8cb7f..4a50a5c71a5f 100644
--- a/include/linux/devfreq-event.h
+++ b/include/linux/devfreq-event.h
@@ -106,8 +106,11 @@ extern int devfreq_event_get_event(struct devfreq_event_dev *edev,
struct devfreq_event_data *edata);
extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
- struct device *dev, int index);
-extern int devfreq_event_get_edev_count(struct device *dev);
+ struct device *dev,
+ const char *phandle_name,
+ int index);
+extern int devfreq_event_get_edev_count(struct device *dev,
+ const char *phandle_name);
extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
struct devfreq_event_desc *desc);
extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
@@ -152,12 +155,15 @@ static inline int devfreq_event_reset_event(struct devfreq_event_dev *edev)
}
static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
- struct device *dev, int index)
+ struct device *dev,
+ const char *phandle_name,
+ int index)
{
return ERR_PTR(-EINVAL);
}
-static inline int devfreq_event_get_edev_count(struct device *dev)
+static inline int devfreq_event_get_edev_count(struct device *dev,
+ const char *phandle_name)
{
return -EINVAL;
}
--
2.17.1
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