From 8b789d89813fae01908ecc825c9dfc0ec90647ad Mon Sep 17 00:00:00 2001 From: Richard Zhu Date: Tue, 15 Oct 2013 10:44:54 +0800 Subject: 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 Signed-off-by: Tejun Heo --- drivers/ata/ahci_platform.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/ata/ahci_platform.c') 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, -- cgit v1.1