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authorRichard Zhu <r65037@freescale.com>2013-10-15 06:44:54 +0400
committerTejun Heo <tj@kernel.org>2013-10-15 16:47:00 +0400
commit8b789d89813fae01908ecc825c9dfc0ec90647ad (patch)
treeb14d0e8c5212e85f2d44fc9cde292ec5eb499a3a /drivers/virtio
parent89951f2245e5c31d6b74dea1570db716175a74fe (diff)
downloadlinux-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>
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