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| author | Richard Zhu <r65037@freescale.com> | 2013-10-15 06:44:54 +0400 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2013-10-15 16:47:00 +0400 |
| commit | 8b789d89813fae01908ecc825c9dfc0ec90647ad (patch) | |
| tree | b14d0e8c5212e85f2d44fc9cde292ec5eb499a3a /drivers/ata/ahci_platform.c | |
| 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/ata/ahci_platform.c')
| -rw-r--r-- | drivers/ata/ahci_platform.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c index 2daaee05cab1..7708ca71f14e 100644 --- a/drivers/ata/ahci_platform.c +++ b/drivers/ata/ahci_platform.c @@ -49,10 +49,11 @@ static struct platform_device_id ahci_devtype[] = { }; MODULE_DEVICE_TABLE(platform, ahci_devtype); -static struct ata_port_operations ahci_platform_ops = { +struct ata_port_operations ahci_platform_ops = { .inherits = &ahci_ops, .host_stop = ahci_host_stop, }; +EXPORT_SYMBOL_GPL(ahci_platform_ops); static struct ata_port_operations ahci_platform_retry_srst_ops = { .inherits = &ahci_pmp_retry_srst_ops, |