ACPI/PCI: PCIe ASPM _OSC support capabilities called when root bridge added
The _OSC capabilities OSC_ACTIVE_STATE_PWR_SUPPORT and
OSC_CLOCK_PWR_CAPABILITY_SUPPORT are set when the root bridge is added
with pci_acpi_osc_support(), so we no longer need to do it in the ASPM
driver. Also add the function pcie_aspm_enabled, which returns true if
pcie_aspm=off is not on the kernel command-line.
Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/drivers/pci/pcie/aspm.c b/drivers/pci/pcie/aspm.c
index 9aad608..e361c7d 100644
--- a/drivers/pci/pcie/aspm.c
+++ b/drivers/pci/pcie/aspm.c
@@ -857,24 +857,15 @@
aspm_disabled = 1;
}
-#ifdef CONFIG_ACPI
-#include <acpi/acpi_bus.h>
-#include <linux/pci-acpi.h>
-static void pcie_aspm_platform_init(void)
+/**
+ * pcie_aspm_enabled - is PCIe ASPM enabled?
+ *
+ * Returns true if ASPM has not been disabled by the command-line option
+ * pcie_aspm=off.
+ **/
+int pcie_aspm_enabled(void)
{
- pcie_osc_support_set(OSC_ACTIVE_STATE_PWR_SUPPORT|
- OSC_CLOCK_PWR_CAPABILITY_SUPPORT);
+ return !aspm_disabled;
}
-#else
-static inline void pcie_aspm_platform_init(void) { }
-#endif
+EXPORT_SYMBOL(pcie_aspm_enabled);
-static int __init pcie_aspm_init(void)
-{
- if (aspm_disabled)
- return 0;
- pcie_aspm_platform_init();
- return 0;
-}
-
-fs_initcall(pcie_aspm_init);