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[3/6] OPP: Introduce dev_pm_opp_get_freq_indexed() API

Message ID 93dc0fb7d0c51908ce1a1c35bec846afa7596e65.1689932341.git.viresh.kumar@linaro.org
State Accepted
Commit 5f756d03e2c7db63c1df7148d7b1739f29ff1532
Headers show
Series OPP: Indexed searching based on frequency | expand

Commit Message

Viresh Kumar July 21, 2023, 9:40 a.m. UTC 
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

In the case of devices with multiple clocks, drivers need to specify the
frequency index for the OPP framework to get the specific frequency within
the required OPP. So let's introduce the dev_pm_opp_get_freq_indexed() API
accepting the frequency index as an argument.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/opp/core.c     | 22 ++++++++++++++++++++++
 include/linux/pm_opp.h |  7 +++++++
 2 files changed, 29 insertions(+)
diff mbox series

Patch

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index cb4f47b341f9..00638d40353f 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -197,6 +197,28 @@  unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
 
+/**
+ * dev_pm_opp_get_freq_indexed() - Gets the frequency corresponding to an
+ *				   available opp with specified index
+ * @opp: opp for which frequency has to be returned for
+ * @index: index of the frequency within the required opp
+ *
+ * Return: frequency in hertz corresponding to the opp with specified index,
+ * else return 0
+ */
+unsigned long dev_pm_opp_get_freq_indexed(struct dev_pm_opp *opp, u32 index)
+{
+	struct opp_table *opp_table = opp->opp_table;
+
+	if (IS_ERR_OR_NULL(opp) || index >= opp_table->clk_count) {
+		pr_err("%s: Invalid parameters\n", __func__);
+		return 0;
+	}
+
+	return opp->rates[index];
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq_indexed);
+
 /**
  * dev_pm_opp_get_level() - Gets the level corresponding to an available opp
  * @opp:	opp for which level value has to be returned for
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 2617f2c51f29..a13a1705df57 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -105,6 +105,8 @@  unsigned long dev_pm_opp_get_power(struct dev_pm_opp *opp);
 
 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
 
+unsigned long dev_pm_opp_get_freq_indexed(struct dev_pm_opp *opp, u32 index);
+
 unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
 
 unsigned int dev_pm_opp_get_required_pstate(struct dev_pm_opp *opp,
@@ -213,6 +215,11 @@  static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
 	return 0;
 }
 
+static inline unsigned long dev_pm_opp_get_freq_indexed(struct dev_pm_opp *opp, u32 index)
+{
+	return 0;
+}
+
 static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
 {
 	return 0;