PCI: brcmstb: Disable L0s component of ASPM if requested

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Some informal internal experiments has shown that the BrcmSTB ASPM L0s
savings may introduce an undesirable noise signal on some customers'
boards.  In addition, L0s was found lacking in realized power savings,
especially relative to the L1 ASPM component.  This is BrcmSTB's
experience and may not hold for others.  At any rate, if the
'aspm-no-l0s' property is present L0s will be disabled.

Link: https://lore.kernel.org/r/20200507201544.43432-5-james.quinlan@broadcom.com
Signed-off-by: Jim Quinlan <jquinlan@broadcom.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

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Jim Quinlan 2020-05-07 16:15:43 -04:00 • committed by Lorenzo Pieralisi

parent 420c517b1e

commit caab002d50

1 changed files with 13 additions and 1 deletions

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drivers/pci/controller/pcie-brcmstb.c

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