This patch adds an API in the opp layer to get the opp table entry corresponding to the voltage passed as the parameter.
Signed-off-by: Thara Gopinath <[email protected]> --- drivers/base/power/opp.c | 28 ++++++++++++++++++++++++++++ include/linux/opp.h | 8 ++++++++ 2 files changed, 36 insertions(+), 0 deletions(-) diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 2bb9b4c..60b4478 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c @@ -354,6 +354,34 @@ struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq) } /** + * opp_find_voltage() - search for an exact voltage + * @dev: device pointer associated with the opp type + * @volt: voltage to search for + * + * Searches for exact match in the opp list and returns handle to the matching + * opp if found, else returns ERR_PTR in case of error and should be handled + * using IS_ERR. + */ +struct opp *opp_find_voltage(struct device *dev, unsigned long volt) +{ + struct device_opp *dev_opp; + struct opp *temp_opp, *opp = ERR_PTR(-ENODEV); + + dev_opp = find_device_opp(dev); + if (IS_ERR(dev_opp)) + return opp; + + list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) { + if (temp_opp->available && temp_opp->u_volt == volt) { + opp = temp_opp; + break; + } + } + + return opp; +} + +/** * opp_add() - Add an OPP table from a table definitions * @dev: device for which we do this operation * @freq: Frequency in Hz for this OPP diff --git a/include/linux/opp.h b/include/linux/opp.h index 5449945..4977d5c 100644 --- a/include/linux/opp.h +++ b/include/linux/opp.h @@ -34,6 +34,8 @@ struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq); struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq); +struct opp *opp_find_voltage(struct device *dev, unsigned long volt); + int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt); int opp_enable(struct device *dev, unsigned long freq); @@ -74,6 +76,12 @@ static inline struct opp *opp_find_freq_ceil(struct device *dev, return ERR_PTR(-EINVAL); } +static inline struct opp *opp_find_voltage(struct device *dev, + unsigned long volt) +{ + return ERR_PTR(-EINVAL); +} + static inline int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) { -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
