[Resending because the previous attempt did not reach the mailing lists.] This new API is needed for a downstream GPU driver, but posting it as an RFC to make sure that we implement it in a potentially upstreamable way or in case someone needs it for an upstream user later.
Add API to get voltage for multiple supplies from opp table Signed-off-by: Nick Fan <[email protected]> --- drivers/opp/core.c | 28 ++++++++++++++++++++++++++++ include/linux/pm_opp.h | 3 +++ 2 files changed, 31 insertions(+) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 2c2df4e..ee73546 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -113,6 +113,34 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage); /** + * dev_pm_opp_get_voltage_supply() - Gets the voltage corresponding to an opp + * with index + * @opp: opp for which voltage has to be returned for + * @index: index to specify the returned supplies + * + * Return: voltage in micro volt corresponding to the opp with index, else + * return 0 + * + * This is useful for devices with multiple power supplies. + */ +unsigned long dev_pm_opp_get_voltage_supply(struct dev_pm_opp *opp, + unsigned int index) +{ + if (IS_ERR_OR_NULL(opp)) { + pr_err("%s: Invalid parameters\n", __func__); + return 0; + } + + if (index >= opp->opp_table->regulator_count) { + pr_err("%s: Invalid supply index: %u\n", __func__, index); + return 0; + } + + return opp->supplies[index].u_volt; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage_supply); + +/** * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp * @opp: opp for which frequency has to be returned for * diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h index 5d399eee..2f1c2a8 100644 --- a/include/linux/pm_opp.h +++ b/include/linux/pm_opp.h @@ -84,6 +84,9 @@ struct dev_pm_set_opp_data { unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp); +unsigned long dev_pm_opp_get_voltage_supply(struct dev_pm_opp *opp, + unsigned int index); + unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp); bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp); -- 1.9.1
