linux-kernel - [PATCH v3 05/18] clk: qcom: common: Handle runtime power management in qcom_cc_really

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250327-videocc-pll-multi-pd-voting-v3-5-895fafd62627@quicinc.com>
Date: Thu, 27 Mar 2025 15:22:25 +0530
From: Jagadeesh Kona <quic_jkona@...cinc.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette
	<mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        "Vladimir
 Zapolskiy" <vladimir.zapolskiy@...aro.org>,
        Dmitry Baryshkov
	<lumag@...nel.org>
CC: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik
	<quic_imrashai@...cinc.com>,
        Taniya Das <quic_tdas@...cinc.com>,
        "Satya Priya
 Kakitapalli" <quic_skakitap@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski@...aro.org>,
        Jagadeesh Kona <quic_jkona@...cinc.com>,
        Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Subject: [PATCH v3 05/18] 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.

Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
---
 drivers/clk/qcom/common.c | 37 ++++++++++++++++++++++++++++---------
 drivers/clk/qcom/common.h |  1 +
 2 files changed, 29 insertions(+), 9 deletions(-)

diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 9e3380fd718198c9fe63d7361615a91c3ecb3d60..9cbf1c5296dad3ee5477a2f5a445488707663b9d 100644
--- 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
--- 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;
 };
 
 /**

-- 
2.34.1