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Message-Id: <e149ff64602f4aba95547add0e96dbf947b5cfdb.1656935522.git.viresh.kumar@linaro.org>
Date: Mon, 4 Jul 2022 17:37:56 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
Stephen Boyd <sboyd@...nel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
Vincent Guittot <vincent.guittot@...aro.org>,
Dmitry Osipenko <dmitry.osipenko@...labora.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH V3 18/20] OPP: Add dev_pm_opp_get_supplies()
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@...labora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
drivers/opp/core.c | 25 +++++++++++++++++++++++++
include/linux/pm_opp.h | 7 +++++++
2 files changed, 32 insertions(+)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 5ecf077b6b17..3a794bff2ba1 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -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
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 9f2f9a792a19..1e2b33d79ba6 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -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;
--
2.31.1.272.g89b43f80a514
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