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authorFinn Thain <fthain@telegraphics.com.au>2019-01-15 07:18:56 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-22 12:21:45 +0300
commitf9c3a570f5fc584f2ca2dd222d1b8c8537fc55f6 (patch)
tree0bacf78e4973fea728c05a0c8b69e8afff1209e0 /drivers/char/Kconfig
parent066ac5c3c4bb467d6e8c7255e36c77060efe5ef7 (diff)
downloadlinux-f9c3a570f5fc584f2ca2dd222d1b8c8537fc55f6.tar.xz
powerpc: Enable HAVE_ARCH_NVRAM_OPS and disable GENERIC_NVRAM
Switch PPC32 kernels from the generic_nvram module to the nvram module. Also fix a theoretical bug where CHRP omits the chrp_nvram_init() call when CONFIG_NVRAM_MODULE=m. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char/Kconfig')
-rw-r--r--drivers/char/Kconfig19
1 files changed, 9 insertions, 10 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index ce9979529cf3..72866a004f07 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -244,25 +244,24 @@ source "drivers/char/hw_random/Kconfig"
config NVRAM
tristate "/dev/nvram support"
- depends on X86 || GENERIC_NVRAM || HAVE_ARCH_NVRAM_OPS
- default M68K
+ depends on X86 || HAVE_ARCH_NVRAM_OPS
+ default M68K || PPC
---help---
If you say Y here and create a character special file /dev/nvram
with major number 10 and minor number 144 using mknod ("man mknod"),
- you get read and write access to the extra bytes of non-volatile
- memory in the real time clock (RTC), which is contained in every PC
- and most Ataris. The actual number of bytes varies, depending on the
- nvram in the system, but is usually 114 (128-14 for the RTC).
-
- This memory is conventionally called "CMOS RAM" on PCs and "NVRAM"
- on Ataris. /dev/nvram may be used to view settings there, or to
- change them (with some utility). It could also be used to frequently
+ you get read and write access to the non-volatile memory.
+
+ /dev/nvram may be used to view settings in NVRAM or to change them
+ (with some utility). It could also be used to frequently
save a few bits of very important data that may not be lost over
power-off and for which writing to disk is too insecure. Note
however that most NVRAM space in a PC belongs to the BIOS and you
should NEVER idly tamper with it. See Ralf Brown's interrupt list
for a guide to the use of CMOS bytes by your BIOS.
+ This memory is conventionally called "NVRAM" on PowerPC machines,
+ "CMOS RAM" on PCs, "NVRAM" on Ataris and "PRAM" on Macintoshes.
+
To compile this driver as a module, choose M here: the
module will be called nvram.