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| author | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-23 11:59:43 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-06-23 11:59:43 -0600 |
| commit | 35e7f73c32ad44a931d918d04e317a7fb0c63e6e (patch) | |
| tree | e3cb8c89c8230aaa45a0f1b101decdc3b9831938 /drivers/pci/pci-sysfs.c | |
| parent | e5028b52e46eb1379d78d136bd0890705f331183 (diff) | |
| parent | 448bd857d48e69b33ef323739dc6d8ca20d4cda7 (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.c | 29 |
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, }; |