[PATCH] ARM: i.MX6: clarify usage of /dev/imx-ocotp

[Stefan Christ]

Explain the relationship between the OCOTP addresses from the i.MX6
Reference Manual and the file offset in '/dev/imx-ocotp'.

Signed-off-by: Stefan Christ <s.christ at phytec.de>
---
 arch/arm/mach-imx/Kconfig | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
index f8f6004..147c411 100644
--- a/arch/arm/mach-imx/Kconfig
+++ b/arch/arm/mach-imx/Kconfig
@@ -676,8 +676,10 @@ config IMX_OCOTP_WRITE
 	prompt "Enable write support of i.MX6 CPUs OTP fuses"
 	depends on IMX_OCOTP
 	help
-	  This adds write support to IMX6 On-Chip OTP registers.
-	  Example of set MAC to 12:34:56:78:9A:BC (2 words with offset 0x22 * 4):
+	  This adds write support to IMX6 On-Chip OTP registers. Example of set
+	  MAC to 12:34:56:78:9A:BC (2 words with address 0x22 (OCOTP_MAC0) and
+	  address 0x23 (OCOTP_MAC1)). To calculate the file offset multiply
+	  the value of the address by 4.
 		mw -l -d /dev/imx-ocotp 0x8C 0x00001234
 		mw -l -d /dev/imx-ocotp 0x88 0x56789ABC
 
-- 
1.9.1