linux-kernel - [PATCH 5/5] thermal: intel: int340x: Add suspend and resume callbacks

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: <20250813185530.635096-6-srinivas.pandruvada@linux.intel.com>
Date: Wed, 13 Aug 2025 11:55:30 -0700
From: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To: rafael@...nel.org,
	daniel.lezcano@...aro.org,
	lukasz.luba@....com
Cc: linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
Subject: [PATCH 5/5] thermal: intel: int340x: Add suspend and resume callbacks

During system suspend callback save slider register and restore during
resume callback.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
---
 .../int340x_thermal/processor_thermal_device.c    | 10 ++++++++++
 .../int340x_thermal/processor_thermal_device.h    |  2 ++
 .../processor_thermal_soc_slider.c                | 15 +++++++++++++++
 3 files changed, 27 insertions(+)

diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
index 4aea5c9baae9..a772c187bedb 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.c
@@ -338,10 +338,17 @@ static int tcc_offset_save = -1;
 
 int proc_thermal_suspend(struct device *dev)
 {
+	struct proc_thermal_device *proc_dev;
+
 	tcc_offset_save = intel_tcc_get_offset(-1);
 	if (tcc_offset_save < 0)
 		dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save);
 
+	proc_dev = dev_get_drvdata(dev);
+
+	if (proc_dev->mmio_feature_mask & PROC_THERMAL_FEATURE_SOC_POWER_SLIDER)
+		proc_thermal_soc_power_slider_suspend(proc_dev);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(proc_thermal_suspend);
@@ -357,6 +364,9 @@ int proc_thermal_resume(struct device *dev)
 	if (tcc_offset_save >= 0)
 		intel_tcc_set_offset(-1, tcc_offset_save);
 
+	if (proc_dev->mmio_feature_mask & PROC_THERMAL_FEATURE_SOC_POWER_SLIDER)
+		proc_thermal_soc_power_slider_resume(proc_dev);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(proc_thermal_resume);
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h
index ba3f64742f2f..30760475102f 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_device.h
@@ -130,5 +130,7 @@ int proc_thermal_ptc_add(struct pci_dev *pdev, struct proc_thermal_device *proc_
 void proc_thermal_ptc_remove(struct pci_dev *pdev);
 
 int proc_thermal_soc_power_slider_add(struct pci_dev *pdev, struct proc_thermal_device *proc_priv);
+void proc_thermal_soc_power_slider_suspend(struct proc_thermal_device *proc_priv);
+void proc_thermal_soc_power_slider_resume(struct proc_thermal_device *proc_priv);
 
 #endif
diff --git a/drivers/thermal/intel/int340x_thermal/processor_thermal_soc_slider.c b/drivers/thermal/intel/int340x_thermal/processor_thermal_soc_slider.c
index bd4ff26a488b..268bf9124d95 100644
--- a/drivers/thermal/intel/int340x_thermal/processor_thermal_soc_slider.c
+++ b/drivers/thermal/intel/int340x_thermal/processor_thermal_soc_slider.c
@@ -248,6 +248,21 @@ int proc_thermal_soc_power_slider_add(struct pci_dev *pdev, struct proc_thermal_
 }
 EXPORT_SYMBOL_NS_GPL(proc_thermal_soc_power_slider_add, "INT340X_THERMAL");
 
+static u64 soc_slider_save;
+
+void proc_thermal_soc_power_slider_suspend(struct proc_thermal_device *proc_priv)
+{
+	soc_slider_save = readq(proc_priv->mmio_base + SOC_POWER_SLIDER_OFFSET);
+
+}
+EXPORT_SYMBOL_NS_GPL(proc_thermal_soc_power_slider_suspend, "INT340X_THERMAL");
+
+void proc_thermal_soc_power_slider_resume(struct proc_thermal_device *proc_priv)
+{
+	writeq(soc_slider_save, proc_priv->mmio_base + SOC_POWER_SLIDER_OFFSET);
+}
+EXPORT_SYMBOL_NS_GPL(proc_thermal_soc_power_slider_resume, "INT340X_THERMAL");
+
 MODULE_IMPORT_NS("INT340X_THERMAL");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Processor Thermal Power Slider Interface");
-- 
2.43.0