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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-07-13 16:23:51 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-07-13 16:23:51 -0400 |
| commit | 327309e899662b482c58cf25f574513d38b5788c (patch) | |
| tree | 069de438aa0e92dd9b6ba28e6b207e2cd07151a5 /drivers/mtd/chips/Kconfig | |
| parent | 0c168775709faa74c1b87f1e61046e0c51ade7f3 (diff) | |
| parent | c32511e2718618f0b53479eb36e07439aa363a74 (diff) | |
| download | kernel-crypto-327309e899662b482c58cf25f574513d38b5788c.tar.gz kernel-crypto-327309e899662b482c58cf25f574513d38b5788c.tar.xz kernel-crypto-327309e899662b482c58cf25f574513d38b5788c.zip | |
Merge upstream 2.6.13-rc3 into ieee80211 branch of netdev-2.6.
Diffstat (limited to 'drivers/mtd/chips/Kconfig')
| -rw-r--r-- | drivers/mtd/chips/Kconfig | 29 |
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/mtd/chips/Kconfig b/drivers/mtd/chips/Kconfig index d682dbc8157..b5dc59389bb 100644 --- a/drivers/mtd/chips/Kconfig +++ b/drivers/mtd/chips/Kconfig @@ -1,5 +1,5 @@ # drivers/mtd/chips/Kconfig -# $Id: Kconfig,v 1.13 2004/12/01 15:49:10 nico Exp $ +# $Id: Kconfig,v 1.15 2005/06/06 23:04:35 tpoynor Exp $ menu "RAM/ROM/Flash chip drivers" depends on MTD!=n @@ -155,6 +155,31 @@ config MTD_CFI_I8 If your flash chips are interleaved in eights - i.e. you have eight flash chips addressed by each bus cycle, then say 'Y'. +config MTD_OTP + bool "Protection Registers aka one-time programmable (OTP) bits" + depends on MTD_CFI_ADV_OPTIONS + default n + help + This enables support for reading, writing and locking so called + "Protection Registers" present on some flash chips. + A subset of them are pre-programmed at the factory with a + unique set of values. The rest is user-programmable. + + The user-programmable Protection Registers contain one-time + programmable (OTP) bits; when programmed, register bits cannot be + erased. Each Protection Register can be accessed multiple times to + program individual bits, as long as the register remains unlocked. + + Each Protection Register has an associated Lock Register bit. When a + Lock Register bit is programmed, the associated Protection Register + can only be read; it can no longer be programmed. Additionally, + because the Lock Register bits themselves are OTP, when programmed, + Lock Register bits cannot be erased. Therefore, when a Protection + Register is locked, it cannot be unlocked. + + This feature should therefore be used with extreme care. Any mistake + in the programming of OTP bits will waste them. + config MTD_CFI_INTELEXT tristate "Support for Intel/Sharp flash chips" depends on MTD_GEN_PROBE @@ -275,7 +300,7 @@ config MTD_JEDEC config MTD_XIP bool "XIP aware MTD support" - depends on !SMP && MTD_CFI_INTELEXT && EXPERIMENTAL + depends on !SMP && (MTD_CFI_INTELEXT || MTD_CFI_AMDSTD) && EXPERIMENTAL default y if XIP_KERNEL help This allows MTD support to work with flash memory which is also |