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OPP: Add and export helper to set bandwidth
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Add and export 'dev_pm_opp_set_bw' to set the bandwidth
levels associated with an OPP.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
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Sibi Sankar authored and Viresh Kumar committed Jul 30, 2020
1 parent fb09180 commit 3ae1f39
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Showing 2 changed files with 37 additions and 0 deletions.
31 changes: 31 additions & 0 deletions drivers/opp/core.c
Original file line number Diff line number Diff line change
Expand Up @@ -831,6 +831,37 @@ static int _set_required_opps(struct device *dev,
return ret;
}

/**
* dev_pm_opp_set_bw() - sets bandwidth levels corresponding to an opp
* @dev: device for which we do this operation
* @opp: opp based on which the bandwidth levels are to be configured
*
* This configures the bandwidth to the levels specified by the OPP. However
* if the OPP specified is NULL the bandwidth levels are cleared out.
*
* Return: 0 on success or a negative error value.
*/
int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
{
struct opp_table *opp_table;
int ret;

opp_table = _find_opp_table(dev);
if (IS_ERR(opp_table)) {
dev_err(dev, "%s: device opp table doesn't exist\n", __func__);
return PTR_ERR(opp_table);
}

if (opp)
ret = _set_opp_bw(opp_table, opp, dev, false);
else
ret = _set_opp_bw(opp_table, NULL, dev, true);

dev_pm_opp_put_opp_table(opp_table);
return ret;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_set_bw);

/**
* dev_pm_opp_set_rate() - Configure new OPP based on frequency
* @dev: device for which we do this operation
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6 changes: 6 additions & 0 deletions include/linux/pm_opp.h
Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,7 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names
void dev_pm_opp_detach_genpd(struct opp_table *opp_table);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp);
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
void dev_pm_opp_remove_table(struct device *dev);
Expand Down Expand Up @@ -342,6 +343,11 @@ static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_f
return -ENOTSUPP;
}

static inline int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
{
return -EOPNOTSUPP;
}

static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
{
return -ENOTSUPP;
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