OPP: Add and export helper to set bandwidth (3ae1f39a) · Commits · 戴 / test

drivers/opp/core.c

+31 −0

Original line number	Diff line number	Diff line
		@@ -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

+6 −0

Original line number	Diff line number	Diff line
		@@ -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);
		@@ -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;