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authorMaciej W. Rozycki <macro@codesourcery.com>2012-09-13 21:23:25 +0100
committerRalf Baechle <ralf@linux-mips.org>2012-09-14 17:54:33 +0200
commit636221b86ce0b3b1238c72bad7172d5227d408ac (patch)
tree50ba58b18c704e3078635ec0e3352df02dd53e63 /arch/mips/mti-malta/malta-platform.c
parentaf89fa3986b9d034a286544ab1ed95096496a2f9 (diff)
MIPS: Malta: Remove RTC Data Mode bootstrap breakage
YAMON requires and enforces the RTC Data Mode (Register B, DM bit) to binary, that is the bit is set every time the board goes through the firmware bootstrap sequence. Likewise its calendar manipulation commands interpret or set the RTC registers unconditionally as binary, never actually checking what the value of the DM bit is, under the (correct) assumption that it has been previously set, to indicate the binary mode. A change to Linux a while ago however introduced a platform-specific tweak that clears that bit and therefore forces the data mode to BCD. This causes clock corruption and misinterpretation that has to be fixed up by user-mode tools in system startup scripts as the initial clock is often incorrect according to the BCD interpretation forced. This change removes the hack; a comment included refers to alarm code, but even if it was broken at one point by requiring the BCD mode, it should have been trivially corrected and even if not, given how rarely the alarm feature is used, that was not really a reasonable justification to break the system clock that is indeed used by virtually everything. And either way the alarm code has been since fixed anyway. Signed-off-by: Maciej W. Rozycki <macro@codesourcery.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4336/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mti-malta/malta-platform.c')
-rw-r--r--arch/mips/mti-malta/malta-platform.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/mips/mti-malta/malta-platform.c b/arch/mips/mti-malta/malta-platform.c
index 4c35301720e7..80562b81f0f2 100644
--- a/arch/mips/mti-malta/malta-platform.c
+++ b/arch/mips/mti-malta/malta-platform.c
@@ -138,11 +138,6 @@ static int __init malta_add_devices(void)
if (err)
return err;
- /*
- * Set RTC to BCD mode to support current alarm code.
- */
- CMOS_WRITE(CMOS_READ(RTC_CONTROL) & ~RTC_DM_BINARY, RTC_CONTROL);
-
return 0;
}