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author | Richard Zhu <r65037@freescale.com> | 2013-10-15 06:44:54 +0400 |
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committer | Tejun Heo <tj@kernel.org> | 2013-10-15 16:47:00 +0400 |
commit | 8b789d89813fae01908ecc825c9dfc0ec90647ad (patch) | |
tree | b14d0e8c5212e85f2d44fc9cde292ec5eb499a3a /drivers/virtio | |
parent | 89951f2245e5c31d6b74dea1570db716175a74fe (diff) | |
download | linux-8b789d89813fae01908ecc825c9dfc0ec90647ad.tar.xz |
ahci: imx: setup power saving methods
In order to save power consumption as much as possible.
* Disable sata phy internal pll reference clock when sysetem enter
into suspend mode, enable it after resume.
* Setup module parameter used to enable imx ahci test power down
mode(PDDQ) or not, when there is no device detected on the port
* minor modifications:
- The format of the copyright is changed, because that the original
one can't pass fsl internal patch reivew without the character
'(c)'.
- Exports ahci_platform_ops and ahci_error_handler().
NOTE:
* The hot-plug can't be supported when PDDQ mode is ever enabled.
* module parameter usage how-to:
- default: enable PDDQ mode when no device detected.
- add "ahci-imx.hotplug=1" into kernel command line if your don't
want to enable PDDQ mode when no device detected on the port.
tj: Slightly updated description and comments.
Signed-off-by: Richard Zhu <r65037@freescale.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'drivers/virtio')
0 files changed, 0 insertions, 0 deletions