On 29-03-19, 14:46, Andrew-sh.Cheng wrote:
> This API will get voltage as input parameter.
> Search all opp items for the item which with max frequency,
> and the voltae is smaller than provided voltage.
>
> Signed-off-by: Andrew-sh.Cheng <andrew-sh.ch...@mediatek.com>
> ---
> drivers/opp/core.c | 55
> ++++++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/pm_opp.h | 8 ++++++++
> 2 files changed, 63 insertions(+)
I have applied this patch with some modifications, here is the diff:
---
drivers/opp/core.c | 29 ++++++++++++++---------------
include/linux/pm_opp.h | 8 ++++----
2 files changed, 18 insertions(+), 19 deletions(-)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 7323cd9aabf9..0e7703fe733f 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -527,31 +527,30 @@ struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct
device *dev,
EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor);
/**
- * dev_pm_opp_find_max_freq_by_volt() - Search for a opp with max freq
- * under provided voltage
- * @dev: device for which we do this operation
- * @u_volt: provided voltage
+ * dev_pm_opp_find_freq_ceil_by_volt() - Find OPP with highest frequency for
+ * target voltage.
+ * @dev: Device for which we do this operation.
+ * @u_volt: Target voltage.
+ *
+ * Search for OPP with highest (ceil) frequency and has voltage <= u_volt.
*
- * Search for the matching available OPP which provide voltage can support.
+ * Return: matching *opp, else returns ERR_PTR in case of error which should be
+ * handled using IS_ERR.
*
- * Return: matching *opp, else returns ERR_PTR in case of error
- * and should be handled using IS_ERR.
* Error return values can be:
- * EINVAL: for bad pointer
- * ERANGE: no match found for search
- * ENODEV: if device not found in list of registered devices
+ * EINVAL: bad parameters
*
* The callers are required to call dev_pm_opp_put() for the returned OPP after
* use.
*/
-struct dev_pm_opp *dev_pm_opp_find_max_freq_by_volt(struct device *dev,
- unsigned long u_volt)
+struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
+ unsigned long u_volt)
{
struct opp_table *opp_table;
struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE);
if (!dev || !u_volt) {
- dev_err(dev, "%s: Invalid argument volt=%d\n", __func__,
+ dev_err(dev, "%s: Invalid argument volt=%lu\n", __func__,
u_volt);
return ERR_PTR(-EINVAL);
}
@@ -564,7 +563,6 @@ struct dev_pm_opp *dev_pm_opp_find_max_freq_by_volt(struct
device *dev,
list_for_each_entry(temp_opp, &opp_table->opp_list, node) {
if (temp_opp->available) {
- /* go to the next node, before choosing prev */
if (temp_opp->supplies[0].u_volt > u_volt)
break;
opp = temp_opp;
@@ -574,12 +572,13 @@ struct dev_pm_opp
*dev_pm_opp_find_max_freq_by_volt(struct device *dev,
/* Increment the reference count of OPP */
if (!IS_ERR(opp))
dev_pm_opp_get(opp);
+
mutex_unlock(&opp_table->lock);
dev_pm_opp_put_opp_table(opp_table);
return opp;
}
-EXPORT_SYMBOL_GPL(dev_pm_opp_find_max_freq_by_volt);
+EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_by_volt);
static int _set_opp_voltage(struct device *dev, struct regulator *reg,
struct dev_pm_opp_supply *supply)
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 57deef9cf5d3..b150fe97ce5a 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -102,8 +102,8 @@ struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device
*dev,
struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev,
unsigned long *freq);
-struct dev_pm_opp *dev_pm_opp_find_max_freq_by_volt(struct device *dev,
- unsigned long u_volt);
+struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct device *dev,
+ unsigned long u_volt);
struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev,
unsigned long *freq);
@@ -209,8 +209,8 @@ static inline struct dev_pm_opp
*dev_pm_opp_find_freq_floor(struct device *dev,
return ERR_PTR(-ENOTSUPP);
}
-static inline struct dev_pm_opp *dev_pm_opp_find_max_freq_by_volt(struct
device *dev,
- unsigned long u_volt)
+static inline struct dev_pm_opp *dev_pm_opp_find_freq_ceil_by_volt(struct
device *dev,
+ unsigned long u_volt)
{
return ERR_PTR(-ENOTSUPP);
}
