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libata: identify and init ZPODD devices

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The ODD can be enabled for ZPODD if the following three conditions are
satisfied:
1 The ODD supports device attention;
2 The platform can runtime power off the ODD through ACPI;
3 The ODD is either slot type or drawer type.
For such ODDs, zpodd_init is called and a new structure is allocated for
it to store ZPODD related stuffs.

And the zpodd_dev_enabled function is used to test if ZPODD is currently
enabled for this ODD.

A new config CONFIG_SATA_ZPODD is added to selectively build ZPODD code.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Aaron Lu
2013-01-15 17:20:58 +08:00
committed by Jeff Garzik
parent 1757d902b0
commit afe7595118
8 changed files with 170 additions and 1 deletions
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4
drivers/ata/libata-core.c
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@@ -2401,8 +2401,10 @@ int ata_dev_configure(struct ata_device *dev)
dma_dir_string = ", DMADIR";
}
if (ata_id_has_da(dev->id))
if (ata_id_has_da(dev->id)) {
dev->flags |= ATA_DFLAG_DA;
zpodd_init(dev);
}
/* print device info to dmesg */
if (ata_msg_drv(ap) && print_info)