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| author | Paul Fertser <fercerpav@gmail.com> | 2011-09-28 13:16:57 +0400 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-09-28 13:47:09 +0200 |
| commit | 3f21c6e8e4635d00e4eff55f85b6c6ede57274ff (patch) | |
| tree | 96b86c7ca478740c4885a7555428be786403baa7 | |
| parent | 7b49dc335ac5f56a4a53c75eba8d9c0ec589b959 (diff) | |
| download | barebox-3f21c6e8e4635d00e4eff55f85b6c6ede57274ff.tar.gz barebox-3f21c6e8e4635d00e4eff55f85b6c6ede57274ff.tar.xz | |
mach-imx: iim: clarify documentation
This adds additional Kconfig help to clarify the way to use barebox
for eFuses handling.
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/mach-imx/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig index 8dc6a24fb5..8d5bd744e8 100644 --- a/arch/arm/mach-imx/Kconfig +++ b/arch/arm/mach-imx/Kconfig @@ -497,6 +497,12 @@ config IMX_IIM Device driver for the IC Identification Module (IIM) fusebox. Use the regular md/mw commands to program and read the fusebox. + Fuses are grouped in "rows", 8 bits per row. When using md/mw commands, + employ the -b switch and consider the region to be specifying the "Fuse + Row Index" rather than "Fuse Row Offset" (which is FRI * 4). You should + consult the documentation for your chip for more elaborate description, + including the eFuse map, e.g. see AN3682 for i.MX25. + config IMX_IIM_FUSE_BLOW bool "IIM fuses blow support" depends on IMX_IIM @@ -507,6 +513,10 @@ config IMX_IIM_FUSE_BLOW Warning: blown fuses can not be unblown. Using this option may damage your CPU, or make it unbootalbe. Use with care. + Before being actually able to blow the fuses, you need to explicitely + enable it: + imx_iim0.permanent_write_enable=1 + endmenu endif |