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OPP: Add dev_pm_opp_get_supplies()

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We already have an API for getting voltage information for a single
regulator, dev_pm_opp_get_voltage(), but there is nothing available for
multiple regulator case.

This patch adds a new API, dev_pm_opp_get_supplies(), to get all
information related to the supplies for an OPP.

Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2022-05-31 13:24:21 +05:30
parent c522ce8a08
commit 69b1af178a
2 changed files with 32 additions and 0 deletions
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25
drivers/opp/core.c
View file

@ -117,6 +117,31 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage);
/**
* dev_pm_opp_get_supplies() - Gets the supply information corresponding to an opp
* @opp: opp for which voltage has to be returned for
* @supplies: Placeholder for copying the supply information.
*
* Return: negative error number on failure, 0 otherwise on success after
* setting @supplies.
*
* This can be used for devices with any number of power supplies. The caller
* must ensure the @supplies array must contain space for each regulator.
*/
int dev_pm_opp_get_supplies(struct dev_pm_opp *opp,
struct dev_pm_opp_supply *supplies)
{
if (IS_ERR_OR_NULL(opp) || !supplies) {
pr_err("%s: Invalid parameters\n", __func__);
return -EINVAL;
}
memcpy(supplies, opp->supplies,
sizeof(*supplies) * opp->opp_table->regulator_count);
return 0;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_supplies);
/**
* dev_pm_opp_get_power() - Gets the power corresponding to an opp
* @opp: opp for which power has to be returned for

7
include/linux/pm_opp.h
View file

@ -129,6 +129,8 @@ void dev_pm_opp_put_opp_table(struct opp_table *opp_table);
unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, struct dev_pm_opp_supply *supplies);
unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp);
unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
@ -217,6 +219,11 @@ static inline unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
return 0;
}
static inline int dev_pm_opp_get_supplies(struct dev_pm_opp *opp, struct dev_pm_opp_supply *supplies)
{
return -EOPNOTSUPP;
}
static inline unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp)
{
return 0;