We can use the ACPI mode information with several drivers as a hint to
cable type. If the ACPI mode set by the BIOS is faster than UDMA33 then
we know the BIOS thinks there are 80wire cables. If it doesn't set such a
mode or it has no ACPI method then we get no further information and can
rely on existing approaches
Introduce the function headers needed. Null it out for non ACPI boxes
Signed-off-by: Alan Cox <alan@xxxxxxxxxx>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.23rc1-mm1/include/linux/libata.h linux-2.6.23rc1-mm1/include/linux/libata.h
--- linux.vanilla-2.6.23rc1-mm1/include/linux/libata.h 2007-07-26 15:02:58.000000000 +0100
+++ linux-2.6.23rc1-mm1/include/linux/libata.h 2007-07-26 15:37:59.000000000 +0100
@@ -883,6 +916,12 @@
ATA_TIMING_CYCLE | ATA_TIMING_UDMA,
};
+/* libata-acpi.c */
+#ifdef CONFIG_ATA_ACPI
+extern int ata_acpi_cbl_80wire(struct ata_port *ap);
+#else
+static inline int ata_acpi_cbl_80wire(struct ata_port *ap) { return 0; }
+#endif
#ifdef CONFIG_PCI
struct pci_bits {
-
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