[libata] improve Kconfig help text for new PMP, SFF options

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index 3eb6035b61b8..292aa9a0f02f 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -45,7 +45,8 @@ config SATA_PMP
         bool "SATA Port Multiplier support"
         default y
         help
-          This option adds support for SATA Port Multipliers.
+          This option adds support for SATA Port Multipliers
+          (the SATA version of an ethernet hub, or SAS expander).
 
 config SATA_AHCI
         tristate "AHCI SATA support"
@@ -79,6 +80,17 @@ config ATA_SFF
           This option adds support for ATA controllers with SFF
           compliant or similar programming interface.
 
+          SFF is the legacy IDE interface that has been around since
+          the dawn of time.  Almost all PATA controllers have an
+          SFF interface.  Many SATA controllers have an SFF interface
+          when configured into a legacy compatibility mode.
+
+          For users with exclusively modern controllers like AHCI,
+          Silicon Image 3124, or Marvell 6440, you may choose to
+          disable this uneeded SFF support.
+
+          If unsure, say Y.
+
 if ATA_SFF
 
 config SATA_SVW