clk: qcom: common: Handle runtime power management in qcom_cc_really_probe

Add support for runtime power management in qcom_cc_really_probe() to
commonize it across all the clock controllers. The runtime power management
is not required for all clock controllers, hence handle the rpm based on
use_rpm flag in clock controller descriptor.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Jagadeesh Kona <quic_jkona@quicinc.com>
Link: https://lore.kernel.org/r/20250530-videocc-pll-multi-pd-voting-v5-5-02303b3a582d@quicinc.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 9e3380fd718198c9fe63d7361615a91c3ecb3d60..9cbf1c5296dad3ee5477a2f5a445488707663b9d 100644 (file)
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -9,6 +9,7 @@
 #include <linux/platform_device.h>
 #include <linux/clk-provider.h>
 #include <linux/interconnect-clk.h>
+#include <linux/pm_runtime.h>
 #include <linux/reset-controller.h>
 #include <linux/of.h>
 
@@ -304,6 +305,16 @@ int qcom_cc_really_probe(struct device *dev,
        if (ret < 0 && ret != -EEXIST)
                return ret;
 
+       if (desc->use_rpm) {
+               ret = devm_pm_runtime_enable(dev);
+               if (ret)
+                       return ret;
+
+               ret = pm_runtime_resume_and_get(dev);
+               if (ret)
+                       return ret;
+       }
+
        reset = &cc->reset;
        reset->rcdev.of_node = dev->of_node;
        reset->rcdev.ops = &qcom_reset_ops;
@@ -314,23 +325,25 @@ int qcom_cc_really_probe(struct device *dev,
 
        ret = devm_reset_controller_register(dev, &reset->rcdev);
        if (ret)
-               return ret;
+               goto put_rpm;
 
        if (desc->gdscs && desc->num_gdscs) {
                scd = devm_kzalloc(dev, sizeof(*scd), GFP_KERNEL);
-               if (!scd)
-                       return -ENOMEM;
+               if (!scd) {
+                       ret = -ENOMEM;
+                       goto put_rpm;
+               }
                scd->dev = dev;
                scd->scs = desc->gdscs;
                scd->num = desc->num_gdscs;
                scd->pd_list = cc->pd_list;
                ret = gdsc_register(scd, &reset->rcdev, regmap);
                if (ret)
-                       return ret;
+                       goto put_rpm;
                ret = devm_add_action_or_reset(dev, qcom_cc_gdsc_unregister,
                                               scd);
                if (ret)
-                       return ret;
+                       goto put_rpm;
        }
 
        cc->rclks = rclks;
@@ -341,7 +354,7 @@ int qcom_cc_really_probe(struct device *dev,
        for (i = 0; i < num_clk_hws; i++) {
                ret = devm_clk_hw_register(dev, clk_hws[i]);
                if (ret)
-                       return ret;
+                       goto put_rpm;
        }
 
        for (i = 0; i < num_clks; i++) {
@@ -350,14 +363,20 @@ int qcom_cc_really_probe(struct device *dev,
 
                ret = devm_clk_register_regmap(dev, rclks[i]);
                if (ret)
-                       return ret;
+                       goto put_rpm;
        }
 
        ret = devm_of_clk_add_hw_provider(dev, qcom_cc_clk_hw_get, cc);
        if (ret)
-               return ret;
+               goto put_rpm;
+
+       ret = qcom_cc_icc_register(dev, desc);
+
+put_rpm:
+       if (desc->use_rpm)
+               pm_runtime_put(dev);
 
-       return qcom_cc_icc_register(dev, desc);
+       return ret;
 }
 EXPORT_SYMBOL_GPL(qcom_cc_really_probe);
 

diff --git a/drivers/clk/qcom/common.h b/drivers/clk/qcom/common.h
index 7ace5d7f5836aa81431153ba92d8f14f2ffe8147..9c10bc8c197cd7dfa25ccd245763ad6acb081523 100644 (file)
--- a/drivers/clk/qcom/common.h
+++ b/drivers/clk/qcom/common.h
@@ -38,6 +38,7 @@ struct qcom_cc_desc {
        const struct qcom_icc_hws_data *icc_hws;
        size_t num_icc_hws;
        unsigned int icc_first_node_id;
+       bool use_rpm;
 };
 
 /**