Add and export 'dev_pm_opp_set_bw' to set the bandwidth levels associated with an OPP. Signed-off-by: Sibi Sankar <sibis@xxxxxxxxxxxxxx> --- v5: https://lkml.org/lkml/2020/5/27/7 * Rework the patch based on ^^ v4: https://patchwork.kernel.org/patch/11019737/ * Pass device opp to set bw levels [Bjorn] drivers/opp/core.c | 31 +++++++++++++++++++++++++++++++ include/linux/pm_opp.h | 6 ++++++ 2 files changed, 37 insertions(+) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index df12c38045330..c87e69f26e976 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -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, opp, 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 diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index d5c4a329321dd..ae68417c0ae00 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -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; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
