From: Saravana Kannan <saravanak@google.com>
To: Georgi Djakov <georgi.djakov@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
Stephen Boyd <sboyd@kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
MyungJoo Ham <myungjoo.ham@samsung.com>,
Kyungmin Park <kyungmin.park@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>
Cc: Saravana Kannan <saravanak@google.com>,
Rajendra Nayak <rnayak@codeaurora.org>,
Jordan Crouse <jcrouse@codeaurora.org>,
vincent.guittot@linaro.org, bjorn.andersson@linaro.org,
amit.kucheria@linaro.org, seansw@qti.qualcomm.com,
daidavid1@codeaurora.org, evgreen@chromium.org,
sibis@codeaurora.org, kernel-team@android.com,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 07/11] OPP: Add API to find an OPP table from its DT node
Date: Thu, 13 Jun 2019 21:17:29 -0700 [thread overview]
Message-ID: <20190614041733.120807-8-saravanak@google.com> (raw)
In-Reply-To: <20190614041733.120807-1-saravanak@google.com>
This allows finding a device's OPP table (when it has multiple) from a
phandle to the OPP table in DT.
Signed-off-by: Saravana Kannan <saravanak@google.com>
---
drivers/opp/of.c | 42 ++++++++++++++++++++++++++++++++++--------
include/linux/pm_opp.h | 7 +++++++
2 files changed, 41 insertions(+), 8 deletions(-)
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index d5815289518a..e8697a4ca3bc 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -42,14 +42,9 @@ struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_get_opp_desc_node);
-struct opp_table *_managed_opp(struct device *dev, int index)
+struct opp_table *_find_opp_table_from_node(struct device_node *np)
{
struct opp_table *opp_table, *managed_table = NULL;
- struct device_node *np;
-
- np = _opp_of_get_opp_desc_node(dev->of_node, index);
- if (!np)
- return NULL;
list_for_each_entry(opp_table, &opp_tables, node) {
if (opp_table->np == np) {
@@ -69,11 +64,42 @@ struct opp_table *_managed_opp(struct device *dev, int index)
}
}
- of_node_put(np);
-
return managed_table;
}
+/**
+ * dev_pm_opp_of_find_table_from_node() - Find OPP table from its DT node
+ * @np: DT node used for finding the OPP table
+ *
+ * Return: OPP table corresponding to the DT node, else NULL on failure.
+ *
+ * The caller needs to put the node with of_node_put() after using it.
+ */
+struct opp_table *dev_pm_opp_of_find_table_from_node(struct device_node *np)
+{
+ struct opp_table *opp_table;
+
+ mutex_lock(&opp_table_lock);
+ opp_table = _find_opp_table_from_node(np);
+ mutex_unlock(&opp_table_lock);
+ return opp_table;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_of_find_table_from_node);
+
+struct opp_table *_managed_opp(struct device *dev, int index)
+{
+ struct device_node *np;
+ struct opp_table *opp_table;
+
+ np = _opp_of_get_opp_desc_node(dev->of_node, index);
+ if (!np)
+ return NULL;
+
+ opp_table = _find_opp_table_from_node(np);
+ of_node_put(np);
+ return opp_table;
+}
+
/* The caller must call dev_pm_opp_put() after the OPP is used */
static struct dev_pm_opp *_find_opp_of_np(struct opp_table *opp_table,
struct device_node *opp_np)
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 2e122af26b8e..d9156b62d966 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -370,6 +370,7 @@ int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
+struct opp_table *dev_pm_opp_of_find_table_from_node(struct device_node *np);
struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
int of_get_required_opp_performance_state(struct device_node *np, int index);
void dev_pm_opp_of_register_em(struct cpumask *cpus);
@@ -407,6 +408,12 @@ static inline struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device
return NULL;
}
+static inline struct opp_table *dev_pm_opp_of_find_table_from_node(
+ struct device_node *np)
+{
+ return NULL;
+}
+
static inline struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp)
{
return NULL;
--
2.22.0.rc2.383.gf4fbbf30c2-goog
next prev parent reply other threads:[~2019-06-14 4:18 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-14 4:17 [PATCH v2 00/11] Introduce Bandwidth OPPs & interconnect devfreq driver Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 01/11] OPP: Allow required-opps even if the device doesn't have power-domains Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 02/11] OPP: Add function to look up required OPP's for a given OPP Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 03/11] PM / devfreq: Add required OPPs support to passive governor Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 04/11] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 05/11] OPP: Add support for bandwidth OPP tables Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 06/11] OPP: Add helper function " Saravana Kannan
2019-06-14 4:17 ` Saravana Kannan [this message]
2019-06-14 4:17 ` [PATCH v2 08/11] dt-bindings: interconnect: Add interconnect-opp-table property Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 09/11] interconnect: Add OPP table support for interconnects Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 10/11] OPP: Allow copying OPPs tables between devices Saravana Kannan
2019-06-14 4:17 ` [PATCH v2 11/11] interconnect: Add devfreq support Saravana Kannan
2019-06-17 15:43 ` Georgi Djakov
2019-06-17 21:18 ` Saravana Kannan
2019-07-16 18:12 ` Sibi Sankar
2019-07-16 19:17 ` Saravana Kannan
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