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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.h | |
| 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.h')
| -rw-r--r-- | drivers/ata/ahci.h | 2 |
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) |