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authorBjorn Helgaas <bhelgaas@google.com>2012-06-23 11:59:43 -0600
committerBjorn Helgaas <bhelgaas@google.com>2012-06-23 11:59:43 -0600
commit35e7f73c32ad44a931d918d04e317a7fb0c63e6e (patch)
treee3cb8c89c8230aaa45a0f1b101decdc3b9831938 /drivers/pci/pci-sysfs.c
parente5028b52e46eb1379d78d136bd0890705f331183 (diff)
parent448bd857d48e69b33ef323739dc6d8ca20d4cda7 (diff)
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
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
-rw-r--r--drivers/pci/pci-sysfs.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index a0b435f20bd..6869009c739 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,
};