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authorRichard Zhu <r65037@freescale.com>2013-10-15 10:44:54 +0800
committerTejun Heo <tj@kernel.org>2013-10-15 08:47:00 -0400
commit8b789d89813fae01908ecc825c9dfc0ec90647ad (patch)
treeb14d0e8c5212e85f2d44fc9cde292ec5eb499a3a /drivers/ata/ahci_platform.c
parent89951f2245e5c31d6b74dea1570db716175a74fe (diff)
downloadop-kernel-dev-8b789d89813fae01908ecc825c9dfc0ec90647ad.zip
op-kernel-dev-8b789d89813fae01908ecc825c9dfc0ec90647ad.tar.gz
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.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 2daaee0..7708ca7 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,
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