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>
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 v1 7/9] OPP: Add function to look up required OPP's for a given OPP
Date: Fri, 7 Jun 2019 21:43:37 -0700 [thread overview]
Message-ID: <20190608044339.115026-8-saravanak@google.com> (raw)
In-Reply-To: <20190608044339.115026-1-saravanak@google.com>
Add a function that allows looking up required OPPs given a source OPP
table, destination OPP table and the source OPP.
Signed-off-by: Saravana Kannan <saravanak@google.com>
---
drivers/opp/core.c | 50 ++++++++++++++++++++++++++++++++++++++++++
include/linux/pm_opp.h | 11 ++++++++++
2 files changed, 61 insertions(+)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 89a2ece88480..d96d5746eb47 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1881,6 +1881,56 @@ void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table,
dev_err(virt_dev, "Failed to find required device entry\n");
}
+/**
+ * dev_pm_opp_xlate_opp() - Find required OPP for src_table OPP.
+ * @src_table: OPP table which has dst_table as one of its required OPP table.
+ * @dst_table: Required OPP table of the src_table.
+ * @pstate: OPP of the src_table.
+ *
+ * This function returns the OPP (present in @dst_table) pointed out by the
+ * "required-opps" property of the OPP (present in @src_table).
+ *
+ * Return: destination table OPP on success, otherwise NULL on errors.
+ */
+struct dev_pm_opp *dev_pm_opp_xlate_opp(struct opp_table *src_table,
+ struct opp_table *dst_table,
+ struct dev_pm_opp *src_opp)
+{
+ struct dev_pm_opp *opp, *dest_opp = NULL;
+ int i;
+
+ if (!src_table || !dst_table || !src_opp)
+ return NULL;
+
+ for (i = 0; i < src_table->required_opp_count; i++) {
+ if (src_table->required_opp_tables[i]->np == dst_table->np)
+ break;
+ }
+
+ if (unlikely(i == src_table->required_opp_count)) {
+ pr_err("%s: Couldn't find matching OPP table (%p: %p)\n",
+ __func__, src_table, dst_table);
+ return NULL;
+ }
+
+ mutex_lock(&src_table->lock);
+
+ list_for_each_entry(opp, &src_table->opp_list, node) {
+ if (opp == src_opp) {
+ dest_opp = opp->required_opps[i];
+ goto unlock;
+ }
+ }
+
+ pr_err("%s: Couldn't find matching OPP (%p: %p)\n", __func__, src_table,
+ dst_table);
+
+unlock:
+ mutex_unlock(&src_table->lock);
+
+ return dest_opp;
+}
+
/**
* dev_pm_opp_xlate_performance_state() - Find required OPP's pstate for src_table.
* @src_table: OPP table which has dst_table as one of its required OPP table.
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 3f30ce55e8eb..13381dc3dd39 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -137,6 +137,9 @@ void dev_pm_opp_unregister_set_opp_helper(struct opp_table *opp_table);
struct opp_table *dev_pm_opp_set_genpd_virt_dev(struct device *dev, struct device *virt_dev, int index);
void dev_pm_opp_put_genpd_virt_dev(struct opp_table *opp_table, struct device *virt_dev);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
+struct dev_pm_opp *dev_pm_opp_xlate_opp(struct opp_table *src_table,
+ struct opp_table *dst_table,
+ struct dev_pm_opp *src_opp);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask);
int dev_pm_opp_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpumask);
@@ -321,6 +324,14 @@ static inline int dev_pm_opp_xlate_performance_state(struct opp_table *src_table
return -ENOTSUPP;
}
+static inline struct dev_pm_opp *dev_pm_opp_xlate_opp(
+ struct opp_table *src_table,
+ struct opp_table *dst_table,
+ struct dev_pm_opp *src_opp)
+{
+ return NULL;
+}
+
static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
{
return -ENOTSUPP;
--
2.22.0.rc2.383.gf4fbbf30c2-goog
next prev parent reply other threads:[~2019-06-08 4:44 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-08 4:43 [PATCH v1 0/9] Introduce Bandwidth OPPs & interconnect devfreq driver Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 1/9] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 2/9] OPP: Add support for bandwidth OPP tables Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 3/9] OPP: Add helper function " Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 4/9] OPP: Add API to find an OPP table from its DT node Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 5/9] dt-bindings: interconnect: Add interconnect-opp-table property Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 6/9] interconnect: Add OPP table support for interconnects Saravana Kannan
2019-06-08 4:43 ` Saravana Kannan [this message]
2019-06-08 4:43 ` [PATCH v1 8/9] OPP: Allow copying OPPs tables between devices Saravana Kannan
2019-06-08 4:43 ` [PATCH v1 9/9] interconnect: Add devfreq support Saravana Kannan
2019-06-08 5:47 ` [PATCH v1 0/9] Introduce Bandwidth OPPs & interconnect devfreq driver Bjorn Andersson
2019-06-08 20:34 ` Saravana Kannan
2019-06-10 23:12 ` [Example code] crypto: qcom-rng: Add interconnect devfreq support Saravana Kannan
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