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PM / OPP: Implement dev_pm_opp_of_add_table_indexed()

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The "operating-points-v2" property can contain a list of phandles now,
specifically for the power domain providers that provide multiple
domains.

Add support to parse that.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Viresh Kumar 2017-04-26 10:45:46 +05:30
parent a1e8c13600
commit fa9b274f8a
2 changed files with 47 additions and 9 deletions
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50
drivers/opp/of.c
View File

@ -250,20 +250,17 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_remove_table);
/* Returns opp descriptor node for a device node, caller must
* do of_node_put() */
static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np)
static struct device_node *_opp_of_get_opp_desc_node(struct device_node *np,
int index)
{
/*
* There should be only ONE phandle present in "operating-points-v2"
* property.
*/
return of_parse_phandle(np, "operating-points-v2", 0);
/* "operating-points-v2" can be an array for power domain providers */
return of_parse_phandle(np, "operating-points-v2", index);
}
/* Returns opp descriptor node for a device, caller must do of_node_put() */
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
{
return _opp_of_get_opp_desc_node(dev->of_node);
return _opp_of_get_opp_desc_node(dev->of_node, 0);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
@ -517,6 +514,41 @@ int dev_pm_opp_of_add_table(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
/**
* dev_pm_opp_of_add_table_indexed() - Initialize indexed opp table from device tree
* @dev: device pointer used to lookup OPP table.
* @index: Index number.
*
* Register the initial OPP table with the OPP library for given device only
* using the "operating-points-v2" property.
*
* Return:
* 0 On success OR
* Duplicate OPPs (both freq and volt are same) and opp->available
* -EEXIST Freq are same and volt are different OR
* Duplicate OPPs (both freq and volt are same) and !opp->available
* -ENOMEM Memory allocation failure
* -ENODEV when 'operating-points' property is not found or is invalid data
* in device node.
* -ENODATA when empty 'operating-points' property is found
* -EINVAL when invalid entries are found in opp-v2 table
*/
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
struct device_node *opp_np;
int ret;
opp_np = _opp_of_get_opp_desc_node(dev->of_node, index);
if (!opp_np)
return -ENODEV;
ret = _of_add_opp_table_v2(dev, opp_np);
of_node_put(opp_np);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table_indexed);
/* CPU device specific helpers */
/**
@ -621,7 +653,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev,
}
/* Get OPP descriptor node */
tmp_np = _opp_of_get_opp_desc_node(cpu_np);
tmp_np = _opp_of_get_opp_desc_node(cpu_np, 0);
of_node_put(cpu_np);
if (!tmp_np) {
pr_err("%pOF: Couldn't find opp node\n", cpu_np);

6
include/linux/pm_opp.h
View File

@ -303,6 +303,7 @@ static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask
#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
int dev_pm_opp_of_add_table(struct device *dev);
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
void dev_pm_opp_of_remove_table(struct device *dev);
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
@ -314,6 +315,11 @@ static inline int dev_pm_opp_of_add_table(struct device *dev)
return -ENOTSUPP;
}
static inline int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
return -ENOTSUPP;
}
static inline void dev_pm_opp_of_remove_table(struct device *dev)
{
}