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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/ata/ahci.h
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>
Diffstat (limited to 'drivers/ata/ahci.h')
-rw-r--r--drivers/ata/ahci.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 11456371f29b..2289efdf8203 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -339,6 +339,7 @@ extern struct device_attribute *ahci_sdev_attrs[];
.sdev_attrs = ahci_sdev_attrs
extern struct ata_port_operations ahci_ops;
+extern struct ata_port_operations ahci_platform_ops;
extern struct ata_port_operations ahci_pmp_retry_srst_ops;
unsigned int ahci_dev_classify(struct ata_port *ap);
@@ -368,6 +369,7 @@ irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance);
irqreturn_t ahci_thread_fn(int irq, void *dev_instance);
void ahci_print_info(struct ata_host *host, const char *scc_s);
int ahci_host_activate(struct ata_host *host, int irq, unsigned int n_msis);
+void ahci_error_handler(struct ata_port *ap);
static inline void __iomem *__ahci_port_base(struct ata_host *host,
unsigned int port_no)