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ACPI/PCI: PCIe ASPM _OSC support capabilities called when root bridge added

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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>
This commit is contained in:
Andrew Patterson
2008-11-10 15:30:55 -07:00
committed by Jesse Barnes
parent 0ef5f8f615
commit 3e1b16002a
3 changed files with 21 additions and 18 deletions
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27
drivers/pci/pcie/aspm.c
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@@ -857,24 +857,15 @@ void pcie_no_aspm(void)
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);