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Message-Id: <20200527202153.11659-4-sibis@codeaurora.org>
Date: Thu, 28 May 2020 01:51:51 +0530
From: Sibi Sankar <sibis@...eaurora.org>
To: viresh.kumar@...aro.org, sboyd@...nel.org,
georgi.djakov@...aro.org, saravanak@...gle.com, mka@...omium.org
Cc: nm@...com, bjorn.andersson@...aro.org, agross@...nel.org,
rjw@...ysocki.net, linux-arm-msm@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
dianders@...omium.org, vincent.guittot@...aro.org,
amit.kucheria@...aro.org, lukasz.luba@....com,
sudeep.holla@....com, smasetty@...eaurora.org,
Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v5 3/5] OPP: Add and export helper to set bandwidth
Add and export 'dev_pm_opp_set_bw' to set the bandwidth
levels associated with an OPP.
Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
v5:
https://lkml.org/lkml/2020/5/27/7
* Rework the patch based on ^^
v4:
https://patchwork.kernel.org/patch/11019737/
* Pass device opp to set bw levels [Bjorn]
drivers/opp/core.c | 31 +++++++++++++++++++++++++++++++
include/linux/pm_opp.h | 6 ++++++
2 files changed, 37 insertions(+)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index df12c38045330..c87e69f26e976 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -831,6 +831,37 @@ static int _set_required_opps(struct device *dev,
return ret;
}
+/**
+ * dev_pm_opp_set_bw() - sets bandwidth levels corresponding to an opp
+ * @dev: device for which we do this operation
+ * @opp: opp based on which the bandwidth levels are to be configured
+ *
+ * This configures the bandwidth to the levels specified by the OPP. However
+ * if the OPP specified is NULL the bandwidth levels are cleared out.
+ *
+ * Return: 0 on success or a negative error value.
+ */
+int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
+{
+ struct opp_table *opp_table;
+ int ret;
+
+ opp_table = _find_opp_table(dev);
+ if (IS_ERR(opp_table)) {
+ dev_err(dev, "%s: device opp table doesn't exist\n", __func__);
+ return PTR_ERR(opp_table);
+ }
+
+ if (opp)
+ ret = _set_opp_bw(opp_table, opp, dev, false);
+ else
+ ret = _set_opp_bw(opp_table, opp, dev, true);
+
+ dev_pm_opp_put_opp_table(opp_table);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_set_bw);
+
/**
* dev_pm_opp_set_rate() - Configure new OPP based on frequency
* @dev: device for which we do this operation
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index d5c4a329321dd..ae68417c0ae00 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -151,6 +151,7 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names
void dev_pm_opp_detach_genpd(struct opp_table *opp_table);
int dev_pm_opp_xlate_performance_state(struct opp_table *src_table, struct opp_table *dst_table, unsigned int pstate);
int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq);
+int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp);
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);
void dev_pm_opp_remove_table(struct device *dev);
@@ -342,6 +343,11 @@ static inline int dev_pm_opp_set_rate(struct device *dev, unsigned long target_f
return -ENOTSUPP;
}
+static inline int dev_pm_opp_set_bw(struct device *dev, struct dev_pm_opp *opp)
+{
+ return -EOPNOTSUPP;
+}
+
static inline int dev_pm_opp_set_sharing_cpus(struct device *cpu_dev, const struct cpumask *cpumask)
{
return -ENOTSUPP;
--
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