usb: host: xhci-tegra: Implement basic ELPG support

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This implements basic engine-level powergate support which allows the
XUSB controller to be put into a low power mode on system sleep and get
it out of that low power mode again on resume.

Based on work by JC Kuo <jckuo@nvidia.com>.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20191206140653.2085561-11-thierry.reding@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Thierry Reding 2019-12-06 15:06:53 +01:00 • committed by Greg Kroah-Hartman

parent 9ccae88e57

commit cad0a5c74e

1 changed files with 119 additions and 8 deletions

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drivers/usb/host/xhci-tegra.c

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