Merge branch 'topic/huang-d3cold-v7' into next

* topic/huang-d3cold-v7:
  PCI/PM: add PCIe runtime D3cold support
  PCI: do not call pci_set_power_state with PCI_D3cold
  PCI/PM: add runtime PM support to PCIe port
  ACPI/PM: specify lowest allowed state for device sleep state

1 files changed, 29 insertions, 0 deletions

diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index a0b435f20bd6..6869009c7393 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -28,6 +28,7 @@
 #include <linux/pci-aspm.h>
 #include <linux/slab.h>
 #include <linux/vgaarb.h>
+#include <linux/pm_runtime.h>
 #include "pci.h"
 
 static int sysfs_initialized;   /* = 0 */
@@ -378,6 +379,31 @@ dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
 
 #endif
 
+#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
+static ssize_t d3cold_allowed_store(struct device *dev,
+                                    struct device_attribute *attr,
+                                    const char *buf, size_t count)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        unsigned long val;
+
+        if (strict_strtoul(buf, 0, &val) < 0)
+                return -EINVAL;
+
+        pdev->d3cold_allowed = !!val;
+        pm_runtime_resume(dev);
+
+        return count;
+}
+
+static ssize_t d3cold_allowed_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+        struct pci_dev *pdev = to_pci_dev(dev);
+        return sprintf (buf, "%u\n", pdev->d3cold_allowed);
+}
+#endif
+
 struct device_attribute pci_dev_attrs[] = {
         __ATTR_RO(resource),
         __ATTR_RO(vendor),
@@ -402,6 +428,9 @@ struct device_attribute pci_dev_attrs[] = {
         __ATTR(remove, (S_IWUSR|S_IWGRP), NULL, remove_store),
         __ATTR(rescan, (S_IWUSR|S_IWGRP), NULL, dev_rescan_store),
 #endif
+#if defined(CONFIG_PM_RUNTIME) && defined(CONFIG_ACPI)
+        __ATTR(d3cold_allowed, 0644, d3cold_allowed_show, d3cold_allowed_store),
+#endif
         __ATTR_NULL,
 };