The GENI Serial Engine (SE) drivers (I2C, SPI, and SERIAL) currently
manage performance levels and operating points directly. This resulting
in code duplication across drivers. such as configuring a specific level
or find and apply an OPP based on a clock frequency.

Introduce two new helper APIs, geni_se_set_perf_level() and
geni_se_set_perf_opp(), addresses this issue by providing a streamlined
method for the GENI Serial Engine (SE) drivers to find and set the OPP
based on the desired performance level, thereby eliminating redundancy.

Signed-off-by: Praveen Talari <praveen.talari@oss.qualcomm.com>
---
 drivers/soc/qcom/qcom-geni-se.c  | 50 ++++++++++++++++++++++++++++++++
 include/linux/soc/qcom/geni-se.h |  4 +++
 2 files changed, 54 insertions(+)

diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
index 30b58f2f2e5d..292afa18b86c 100644
--- a/drivers/soc/qcom/qcom-geni-se.c
+++ b/drivers/soc/qcom/qcom-geni-se.c
@@ -282,6 +282,12 @@ struct se_fw_hdr {
 #define geni_setbits32(_addr, _v) writel(readl(_addr) |  (_v), _addr)
 #define geni_clrbits32(_addr, _v) writel(readl(_addr) & ~(_v), _addr)
 
+enum domain_idx {
+	DOMAIN_IDX_POWER,
+	DOMAIN_IDX_PERF,
+	DOMAIN_IDX_MAX
+};
+
 /**
  * geni_se_get_qup_hw_version() - Read the QUP wrapper Hardware version
  * @se:	Pointer to the corresponding serial engine.
@@ -1075,6 +1081,50 @@ int geni_se_resources_state(struct geni_se *se, bool power_on)
 }
 EXPORT_SYMBOL_GPL(geni_se_resources_state);
 
+/**
+ * geni_se_set_perf_level() - Set performance level for GENI SE.
+ * @se: Pointer to the struct geni_se instance.
+ * @level: The desired performance level.
+ *
+ * Sets the performance level by directly calling dev_pm_opp_set_level
+ * on the performance device associated with the SE.
+ *
+ * Return: 0 on success, or a negative error code on failure.
+ */
+int geni_se_set_perf_level(struct geni_se *se, unsigned long level)
+{
+	return dev_pm_opp_set_level(se->pd_list->pd_devs[DOMAIN_IDX_PERF], level);
+}
+EXPORT_SYMBOL_GPL(geni_se_set_perf_level);
+
+/**
+ * geni_se_set_perf_opp() - Set performance OPP for GENI SE by frequency.
+ * @se: Pointer to the struct geni_se instance.
+ * @clk_freq: The requested clock frequency.
+ *
+ * Finds the nearest operating performance point (OPP) for the given
+ * clock frequency and applies it to the SE's performance device.
+ *
+ * Return: 0 on success, or a negative error code on failure.
+ */
+int geni_se_set_perf_opp(struct geni_se *se, unsigned long clk_freq)
+{
+	struct device *perf_dev = se->pd_list->pd_devs[DOMAIN_IDX_PERF];
+	struct dev_pm_opp *opp;
+	int ret;
+
+	opp = dev_pm_opp_find_freq_floor(perf_dev, &clk_freq);
+	if (IS_ERR(opp)) {
+		dev_err(se->dev, "failed to find opp for freq %lu\n", clk_freq);
+		return PTR_ERR(opp);
+	}
+
+	ret = dev_pm_opp_set_opp(perf_dev, opp);
+	dev_pm_opp_put(opp);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(geni_se_set_perf_opp);
+
 /**
  * geni_se_domain_attach() - Attach power domains to a GENI SE device.
  * @se: Pointer to the geni_se structure representing the GENI SE device.
diff --git a/include/linux/soc/qcom/geni-se.h b/include/linux/soc/qcom/geni-se.h
index 8c9b847aaf20..cac999d6ca31 100644
--- a/include/linux/soc/qcom/geni-se.h
+++ b/include/linux/soc/qcom/geni-se.h
@@ -548,5 +548,9 @@ int geni_se_resources_state(struct geni_se *se, bool power_on);
 int geni_load_se_firmware(struct geni_se *se, enum geni_se_protocol_type protocol);
 
 int geni_se_domain_attach(struct geni_se *se);
+
+int geni_se_set_perf_level(struct geni_se *se, unsigned long level);
+
+int geni_se_set_perf_opp(struct geni_se *se, unsigned long clk_freq);
 #endif
 #endif
-- 
2.34.1