1 files changed, 32 insertions, 0 deletions

diff --git a/drivers/pwm/pwm-lpss-pci.c b/drivers/pwm/pwm-lpss-pci.c
index c15bc6d00f1a..7160e8ab38a4 100644
--- a/drivers/pwm/pwm-lpss-pci.c
+++ b/drivers/pwm/pwm-lpss-pci.c
@@ -13,6 +13,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/pci.h>
+#include <linux/pm_runtime.h>
 
 #include "pwm-lpss.h"
 
@@ -33,6 +34,10 @@ static int pwm_lpss_probe_pci(struct pci_dev *pdev,
                 return PTR_ERR(lpwm);
 
         pci_set_drvdata(pdev, lpwm);
+
+        pm_runtime_put(&pdev->dev);
+        pm_runtime_allow(&pdev->dev);
+
         return 0;
 }
 
@@ -40,9 +45,33 @@ static void pwm_lpss_remove_pci(struct pci_dev *pdev)
 {
         struct pwm_lpss_chip *lpwm = pci_get_drvdata(pdev);
 
+        pm_runtime_forbid(&pdev->dev);
+        pm_runtime_get_sync(&pdev->dev);
+
         pwm_lpss_remove(lpwm);
 }
 
+#ifdef CONFIG_PM
+static int pwm_lpss_runtime_suspend_pci(struct device *dev)
+{
+        /*
+         * The PCI core will handle transition to D3 automatically. We only
+         * need to provide runtime PM hooks for that to happen.
+         */
+        return 0;
+}
+
+static int pwm_lpss_runtime_resume_pci(struct device *dev)
+{
+        return 0;
+}
+#endif
+
+static const struct dev_pm_ops pwm_lpss_pci_pm = {
+        SET_RUNTIME_PM_OPS(pwm_lpss_runtime_suspend_pci,
+                           pwm_lpss_runtime_resume_pci, NULL)
+};
+
 static const struct pci_device_id pwm_lpss_pci_ids[] = {
         { PCI_VDEVICE(INTEL, 0x0ac8), (unsigned long)&pwm_lpss_bxt_info},
         { PCI_VDEVICE(INTEL, 0x0f08), (unsigned long)&pwm_lpss_byt_info},
@@ -60,6 +89,9 @@ static struct pci_driver pwm_lpss_driver_pci = {
         .id_table = pwm_lpss_pci_ids,
         .probe = pwm_lpss_probe_pci,
         .remove = pwm_lpss_remove_pci,
+        .driver = {
+                .pm = &pwm_lpss_pci_pm,
+        },
 };
 module_pci_driver(pwm_lpss_driver_pci);