Commit c4fcf1ad authored by Antoine Tenart's avatar Antoine Tenart Committed by Daniel Lezcano
Browse files

thermal/drivers/int340x: Improve the tcc offset saving for suspend/resume 



When the driver resumes, the tcc offset is set back to its previous
value. But this only works if the value was user defined as otherwise
the offset isn't saved. This asymmetric logic is harder to maintain and
introduced some issues.

Improve the logic by saving the tcc offset in a suspend op, so the right
value is always restored after a resume.

Signed-off-by: default avatarAntoine Tenart <atenart@kernel.org>
Reviewed-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Tested-by: default avatarSrinivas Pandruvada &lt;srinivas.pI <andruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20210909085613.5577-3-atenart@kernel.org


Signed-off-by: default avatarDaniel Lezcano <daniel.lezcano@linaro.org>
parent fb6de59d

drivers/thermal/intel/int340x_thermal/int3401_thermal.c

+7 −1
Original line number Diff line number Diff line
@@ -44,15 +44,21 @@ static int int3401_remove(struct platform_device *pdev) 
}



#ifdef CONFIG_PM_SLEEP

static int int3401_thermal_suspend(struct device *dev)

{

	return proc_thermal_suspend(dev);

}

static int int3401_thermal_resume(struct device *dev)

{

	return proc_thermal_resume(dev);

}

#else

#define int3401_thermal_suspend NULL

#define int3401_thermal_resume NULL

#endif



static SIMPLE_DEV_PM_OPS(int3401_proc_thermal_pm, NULL, int3401_thermal_resume);

static SIMPLE_DEV_PM_OPS(int3401_proc_thermal_pm, int3401_thermal_suspend,

			 int3401_thermal_resume);



static struct platform_driver int3401_driver = {

	.probe = int3401_add,

drivers/thermal/intel/int340x_thermal/processor_thermal_device.c

+28 −8
Original line number Diff line number Diff line
@@ -68,8 +68,7 @@ static const struct attribute_group power_limit_attribute_group = { 
	.name = "power_limits"

};



static ssize_t tcc_offset_degree_celsius_show(struct device *dev,

			       struct device_attribute *attr, char *buf)

static int tcc_get_offset(void)

{

	u64 val;

	int err;
@@ -78,8 +77,20 @@ static ssize_t tcc_offset_degree_celsius_show(struct device *dev, 
	if (err)

		return err;



	val = (val >> 24) & 0x3f;

	return sprintf(buf, "%d\n", (int)val);

	return (val >> 24) & 0x3f;

}



static ssize_t tcc_offset_degree_celsius_show(struct device *dev,

					      struct device_attribute *attr,

					      char *buf)

{

	int tcc;



	tcc = tcc_get_offset();

	if (tcc < 0)

		return tcc;



	return sprintf(buf, "%d\n", tcc);

}



static int tcc_offset_update(unsigned int tcc)
@@ -107,8 +118,6 @@ static int tcc_offset_update(unsigned int tcc) 
	return 0;

}



static int tcc_offset_save = -1;



static ssize_t tcc_offset_degree_celsius_store(struct device *dev,

				struct device_attribute *attr, const char *buf,

				size_t count)
@@ -131,8 +140,6 @@ static ssize_t tcc_offset_degree_celsius_store(struct device *dev, 
	if (err)

		return err;



	tcc_offset_save = tcc;



	return count;

}
@@ -345,6 +352,18 @@ void proc_thermal_remove(struct proc_thermal_device *proc_priv) 
}

EXPORT_SYMBOL_GPL(proc_thermal_remove);



static int tcc_offset_save = -1;



int proc_thermal_suspend(struct device *dev)

{

	tcc_offset_save = tcc_get_offset();

	if (tcc_offset_save < 0)

		dev_warn(dev, "failed to save offset (%d)\n", tcc_offset_save);



	return 0;

}

EXPORT_SYMBOL_GPL(proc_thermal_suspend);



int proc_thermal_resume(struct device *dev)

{

	struct proc_thermal_device *proc_dev;
@@ -352,6 +371,7 @@ int proc_thermal_resume(struct device *dev) 
	proc_dev = dev_get_drvdata(dev);

	proc_thermal_read_ppcc(proc_dev);



	/* Do not update if saving failed */

	if (tcc_offset_save >= 0)

		tcc_offset_update(tcc_offset_save);

drivers/thermal/intel/int340x_thermal/processor_thermal_device.h

+1 −0
Original line number Diff line number Diff line
@@ -83,6 +83,7 @@ void proc_thermal_mbox_remove(struct pci_dev *pdev); 
int processor_thermal_send_mbox_cmd(struct pci_dev *pdev, u16 cmd_id, u32 cmd_data, u32 *cmd_resp);

int proc_thermal_add(struct device *dev, struct proc_thermal_device *priv);

void proc_thermal_remove(struct proc_thermal_device *proc_priv);

int proc_thermal_suspend(struct device *dev);

int proc_thermal_resume(struct device *dev);

int proc_thermal_mmio_add(struct pci_dev *pdev,

			  struct proc_thermal_device *proc_priv,

drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci.c

+17 −1
Original line number Diff line number Diff line
@@ -314,6 +314,20 @@ static void proc_thermal_pci_remove(struct pci_dev *pdev) 
}



#ifdef CONFIG_PM_SLEEP

static int proc_thermal_pci_suspend(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);

	struct proc_thermal_device *proc_priv;

	struct proc_thermal_pci *pci_info;



	proc_priv = pci_get_drvdata(pdev);

	pci_info = proc_priv->priv_data;



	if (!pci_info->no_legacy)

		return proc_thermal_suspend(dev);



	return 0;

}

static int proc_thermal_pci_resume(struct device *dev)

{

	struct pci_dev *pdev = to_pci_dev(dev);
@@ -335,10 +349,12 @@ static int proc_thermal_pci_resume(struct device *dev) 
	return 0;

}

#else

#define proc_thermal_pci_suspend NULL

#define proc_thermal_pci_resume NULL

#endif



static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, NULL, proc_thermal_pci_resume);

static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, proc_thermal_pci_suspend,

			 proc_thermal_pci_resume);



static const struct pci_device_id proc_thermal_pci_ids[] = {

	{ PCI_DEVICE_DATA(INTEL, ADL_THERMAL, PROC_THERMAL_FEATURE_RAPL | PROC_THERMAL_FEATURE_FIVR | PROC_THERMAL_FEATURE_DVFS | PROC_THERMAL_FEATURE_MBOX) },

drivers/thermal/intel/int340x_thermal/processor_thermal_device_pci_legacy.c

+7 −1
Original line number Diff line number Diff line
@@ -107,15 +107,21 @@ static void proc_thermal_pci_remove(struct pci_dev *pdev) 
}



#ifdef CONFIG_PM_SLEEP

static int proc_thermal_pci_suspend(struct device *dev)

{

	return proc_thermal_suspend(dev);

}

static int proc_thermal_pci_resume(struct device *dev)

{

	return proc_thermal_resume(dev);

}

#else

#define proc_thermal_pci_suspend NULL

#define proc_thermal_pci_resume NULL

#endif



static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, NULL, proc_thermal_pci_resume);

static SIMPLE_DEV_PM_OPS(proc_thermal_pci_pm, proc_thermal_pci_suspend,

			 proc_thermal_pci_resume);



static const struct pci_device_id proc_thermal_pci_ids[] = {

	{ PCI_DEVICE_DATA(INTEL, BDW_THERMAL, 0) },