PCI/ASPM: Add pci_enable_link_state()

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Add pci_enable_link_state() to allow devices to change the default BIOS
configured states. Clears the BIOS default settings then sets the new
states and reconfigures the link under the semaphore. Also add
PCIE_LINK_STATE_ALL macro for convenience for callers that want to enable
all link states.

Link: https://lore.kernel.org/r/20230120031522.2304439-2-david.e.box@linux.intel.com
Signed-off-by: Michael Bottini <michael.a.bottini@linux.intel.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>

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Michael Bottini 2023-01-19 19:15:19 -08:00 • committed by Lorenzo Pieralisi

parent 1b929c02af

commit de82f60f9c

2 changed files with 61 additions and 0 deletions

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54

drivers/pci/pcie/aspm.c

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7

include/linux/pci.h

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