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Commit 4d0dd6c1 authored by Srinivas Pandruvada's avatar Srinivas Pandruvada Committed by Zhang Rui
Browse files

Thermal/int340x/processor_thermal: Enable auxiliary DTS for Braswell 



Support two auxiliary DTS present on Braswell platform using side band
IOSF interface. This supports two read write trips, which can be used
to get notification on trip violation.

Signed-off-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
parent 3a2419f8

drivers/thermal/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -278,6 +278,7 @@ config INT340X_THERMAL 
	select THERMAL_GOV_USER_SPACE

	select ACPI_THERMAL_REL

	select ACPI_FAN

	select INTEL_SOC_DTS_IOSF_CORE

	help

	  Newer laptops and tablets that use ACPI may have thermal sensors and

	  other devices with thermal control capabilities outside the core

drivers/thermal/int340x_thermal/processor_thermal_device.c

+54 −1
Original line number Diff line number Diff line
@@ -16,10 +16,12 @@ 
#include <linux/module.h>

#include <linux/init.h>

#include <linux/pci.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/acpi.h>

#include <linux/thermal.h>

#include "int340x_thermal_zone.h"

#include "../intel_soc_dts_iosf.h"



/* Broadwell-U/HSB thermal reporting device */

#define PCI_DEVICE_ID_PROC_BDW_THERMAL	0x1603
@@ -42,6 +44,7 @@ struct proc_thermal_device { 
	struct acpi_device *adev;

	struct power_config power_limits[2];

	struct int34x_thermal_zone *int340x_zone;

	struct intel_soc_dts_sensors *soc_dts;

};



enum proc_thermal_emum_mode_type {
@@ -308,6 +311,18 @@ static int int3401_remove(struct platform_device *pdev) 
	return 0;

}



static irqreturn_t proc_thermal_pci_msi_irq(int irq, void *devid)

{

	struct proc_thermal_device *proc_priv;

	struct pci_dev *pdev = devid;



	proc_priv = pci_get_drvdata(pdev);



	intel_soc_dts_iosf_interrupt_handler(proc_priv->soc_dts);



	return IRQ_HANDLED;

}



static int  proc_thermal_pci_probe(struct pci_dev *pdev,

				   const struct pci_device_id *unused)

{
@@ -334,12 +349,50 @@ static int proc_thermal_pci_probe(struct pci_dev *pdev, 
	pci_set_drvdata(pdev, proc_priv);

	proc_thermal_emum_mode = PROC_THERMAL_PCI;



	if (pdev->device == PCI_DEVICE_ID_PROC_BSW_THERMAL) {

		/*

		 * Enumerate additional DTS sensors available via IOSF.

		 * But we are not treating as a failure condition, if

		 * there are no aux DTSs enabled or fails. This driver

		 * already exposes sensors, which can be accessed via

		 * ACPI/MSR. So we don't want to fail for auxiliary DTSs.

		 */

		proc_priv->soc_dts = intel_soc_dts_iosf_init(

					INTEL_SOC_DTS_INTERRUPT_MSI, 2, 0);



		if (proc_priv->soc_dts && pdev->irq) {

			ret = pci_enable_msi(pdev);

			if (!ret) {

				ret = request_threaded_irq(pdev->irq, NULL,

						proc_thermal_pci_msi_irq,

						IRQF_ONESHOT, "proc_thermal",

						pdev);

				if (ret) {

					intel_soc_dts_iosf_exit(

							proc_priv->soc_dts);

					pci_disable_msi(pdev);

					proc_priv->soc_dts = NULL;

				}

			}

		} else

			dev_err(&pdev->dev, "No auxiliary DTSs enabled\n");

	}



	return 0;

}



static void  proc_thermal_pci_remove(struct pci_dev *pdev)

{

	proc_thermal_remove(pci_get_drvdata(pdev));

	struct proc_thermal_device *proc_priv = pci_get_drvdata(pdev);



	if (proc_priv->soc_dts) {

		intel_soc_dts_iosf_exit(proc_priv->soc_dts);

		if (pdev->irq) {

			free_irq(pdev->irq, pdev);

			pci_disable_msi(pdev);

		}

	}

	proc_thermal_remove(proc_priv);

	pci_disable_device(pdev);

}