Re: system time 20% too fast on QNAP TS-210
On Mon, Jan 25, 2010 at 07:21:04PM +0100, Adi wrote:
> >>I installed debian lenny on a QNAP TS-210, but discovered, that the
> >>system time is 20% too fast. The kernel also set the BogoMIPS wrong
> >>(20% too low)
> >>
> >>Any idea, if I messed something up or if this is a bug?
> >
> >What does
> >
> > dmesg | grep TCLK=
> >
> >say?
> [ 0.260000] Kirkwood: MV88F6281-Rev-Unsupported, TCLK=166666667.
>
> >Does serial work at the right baud rate, if you've tried that?
>
> I measured following Baud rates (with a scope hooked up to the serial
> connector)
> Boot: 138.9 kBaud (should be 115200 Baud)
> test with 9600 Baud, resulted in 11630 Baud
> -> again 20% too high
> (which is also the explanation why qcontrol does not work)
Makes perfect sense.
You'll need this patch backported from upstream:
commit aec1bad326a99a8b0860fa9d518985ee388c9391
Author: Siddarth Gore <gores@marvell.com>
Date: Tue Jun 9 14:41:02 2009 +0530
[ARM] Kirkwood: Add support for 6281-A1
Signed-off-by: Siddarth Gore <gores@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index 0f69198..0acb61f 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -838,7 +838,8 @@ int __init kirkwood_find_tclk(void)
u32 dev, rev;
kirkwood_pcie_id(&dev, &rev);
- if (dev == MV88F6281_DEV_ID && rev == MV88F6281_REV_A0)
+ if (dev == MV88F6281_DEV_ID && (rev == MV88F6281_REV_A0 ||
+ rev == MV88F6281_REV_A1))
return 200000000;
return 166666667;
@@ -872,6 +873,8 @@ static char * __init kirkwood_id(void)
return "MV88F6281-Z0";
else if (rev == MV88F6281_REV_A0)
return "MV88F6281-A0";
+ else if (rev == MV88F6281_REV_A1)
+ return "MV88F6281-A1";
else
return "MV88F6281-Rev-Unsupported";
} else if (dev == MV88F6192_DEV_ID) {
diff --git a/arch/arm/mach-kirkwood/include/mach/kirkwood.h b/arch/arm/mach-kirk
index 07af858..54c1327 100644
--- a/arch/arm/mach-kirkwood/include/mach/kirkwood.h
+++ b/arch/arm/mach-kirkwood/include/mach/kirkwood.h
@@ -101,6 +101,7 @@
#define MV88F6281_DEV_ID 0x6281
#define MV88F6281_REV_Z0 0
#define MV88F6281_REV_A0 2
+#define MV88F6281_REV_A1 3
#define MV88F6192_DEV_ID 0x6192
#define MV88F6192_REV_Z0 0
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