libata: make SFF support optional

Now that SFF support is completely separated out from the core layer,
it can be made optional.  Add CONFIG_ATA_SFF and let SFF drivers
depend on it.  If CONFIG_ATA_SFF isn't set, all codes in libata-sff.c
and data structures for SFF support are disabled.  This saves good
number of bytes for small systems.

Signed-off-by: Tejun Heo <htejun@gmail.com>

1 files changed, 27 insertions, 17 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index ea665c249035..48c8fc55391e 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -49,6 +49,32 @@ config SATA_AHCI
 
           If unsure, say N.
 
+config SATA_SIL24
+        tristate "Silicon Image 3124/3132 SATA support"
+        depends on PCI
+        help
+          This option enables support for Silicon Image 3124/3132 Serial ATA.
+
+          If unsure, say N.
+
+config SATA_FSL
+        tristate "Freescale 3.0Gbps SATA support"
+        depends on FSL_SOC
+        help
+          This option enables support for Freescale 3.0Gbps SATA controller.
+          It can be found on MPC837x and MPC8315.
+
+          If unsure, say N.
+
+config ATA_SFF
+        bool "ATA SFF support"
+        default y
+        help
+          This option adds support for ATA controllers with SFF
+          compliant or similar programming interface.
+
+if ATA_SFF
+
 config SATA_SVW
         tristate "ServerWorks Frodo / Apple K2 SATA support"
         depends on PCI
@@ -125,14 +151,6 @@ config SATA_SIL
 
           If unsure, say N.
 
-config SATA_SIL24
-        tristate "Silicon Image 3124/3132 SATA support"
-        depends on PCI
-        help
-          This option enables support for Silicon Image 3124/3132 Serial ATA.
-
-          If unsure, say N.
-
 config SATA_SIS
         tristate "SiS 964/965/966/180 SATA support"
         depends on PCI
@@ -183,15 +201,6 @@ config PATA_ACPI
           firmware in the BIOS. This driver can sometimes handle
           otherwise unsupported hardware.
 
-config SATA_FSL
-        tristate "Freescale 3.0Gbps SATA support"
-        depends on FSL_SOC
-        help
-          This option enables support for Freescale 3.0Gbps SATA controller.
-          It can be found on MPC837x and MPC8315.
-
-          If unsure, say N.
-
 config PATA_ALI
         tristate "ALi PATA support (Experimental)"
         depends on PCI && EXPERIMENTAL
@@ -679,4 +688,5 @@ config PATA_BF54X
 
           If unsure, say N.
 
+endif # ATA_SFF
 endif # ATA