diff options
Diffstat (limited to 'drivers/pci/pci-sysfs.c')
| -rw-r--r-- | drivers/pci/pci-sysfs.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 86c63fe45d11..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, }; @@ -1112,7 +1141,7 @@ static struct bin_attribute pcie_config_attr = { .write = pci_write_config, }; -int __attribute__ ((weak)) pcibios_add_platform_entries(struct pci_dev *dev) +int __weak pcibios_add_platform_entries(struct pci_dev *dev) { return 0; } |