On Wed, 26 Jul 2006 15:35:45 +0800 zhao, forrest wrote: > Hello, all > > In ACPI spec 3.0, section 9.9 defines 4 objects for PATA/SATA: > > _GTF is for both PATA and SATA, which is used to return ATA task file > needed to re-init the drive; > _SDD is SATA-only object, which is used to inform the platform of the > type of device attached to a port; > _GTM and _STM are PATA-only objects, which are used to get/set PATA > timing information(i.e. PIO and DMA speed). > > In this patch set, > ata_acpi_exec_tfs() is for getting ATA task file from _GTF and executing > them for a given drive; > ata_acpi_push_id() is for setting _SDD. > > > NOTE: this patch doesn't include the support for _GTM and _STM because > libata defines ->set_piomode(), ->set_dmamode() callbacks for LLDD, > which do the same work as _GTM and _STM. So I think it's not necessary > to provide redundant functionality by _GTM and _STM. Do LLDDs use set_piomode() and set_dmamode() to save those modes before suspend and restore them on resume? Thanks, --- ~Randy - : send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
