linux.git/arch/ppc/platforms, branch v2.6.12

[PATCH] ppc32: Fix nasty sleep/wakeup problem

2005-06-10T04:33:35+00:00

Despite all the care lately in making the powermac sleep/wakeup as
robust as possible, there is still a nasty related to the use of cpufreq
on PMU based machines.  Unfortunately, it affects paulus old powerbook
so I have to fix it :)

We didn't manage to understand what is precisely going on, it leads to
memory corruption and might have to do with RAM not beeing properly
refreshed when a cpufreq transition is done right before the sleep.

The best workaround (and less intrusive at this point) we could come up
with is included in this patch.  We basically do _not_ force a switch to
high speed on suspend anymore (that is what is causing the problem) on
those machines.  We still force a speed switch on wakeup (since we don't
know what speed we are coming back from sleep at, and that seems to work
fine).

Since, during this short interval, the actual CPU speed might be
incorrect, we also hack around by multiplying loops_per_jiffy by 2 (max
speed factor on those machines) during early wakeup stage to make sure
udelay's during that time aren't too short.

For after 2.6.12, we'll change udelay implementation to use the CPU
timebase (which is always constant) instead like we do on ppc64 and thus
get rid of all those problems.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: i8259 PIC should not be initialized if PCI is not configured

2005-05-28T23:46:16+00:00

Trying to initialize the i8259 PIC will not work if CONFIG_PCI is not
enabled.  The kernel hangs if the initialization is tried.

Signed-off-by: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: Add soft reset to MPC834x

2005-05-28T23:46:16+00:00

This change allows mpc83xx_restart to issue a software reset.

Signed-off-by: Randy Vinson 
Signed-off-by: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: MPC834x BCSR_SIZE too small for use in a BAT.

2005-05-28T23:46:16+00:00

The call to io_block_mapping was creating an invalid BAT entry because the
value of BCSR_SIZE (32K) is too small to be used in a BAT (128K min).  This
change removes the io_block_mapping call since these registers can easily
be mapped using ioremap at the point of use.

Signed-off-by: Randy Vinson 
Signed-off-by: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: Fix building MPC8555 CDS when CONFIG_PCI is disabled

2005-05-28T23:46:16+00:00

The patch that introduced support for the VIA chipset broke building if
CONFIG_PCI is disabled.

Signed-off-by: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: Support for 82xx PQII on-chip PCI bridge

2005-05-28T23:46:15+00:00

This patch adds on-chip PCI bridge support for the PQ2 family.  The
incomplete existent code is updated with interrupt handling stuff and
board-specific bits for 8272ADS and PQ2FADS; the related files were renamed
(from m8260_pci to m82xx_pci) to be of more generic fashion.  This is
tested with 8266ADS and 8272ADS, should work on PQ2FADS as well.

Signed-off-by: Vitaly Bordug 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: Add VIA IDE support to MPC8555 CDS platform

2005-05-28T23:46:15+00:00

Add support for the VIA IDE controller that exists on the MPC8555 CDS
system.  Updated the config for the system to enable support by default.

Signed-off-by: Scott Hall 
Signed-off-by: Kumar Gala 
Cc: Bartlomiej Zolnierkiewicz 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: Fix some minor issues related to FSL Book-E KGDB support

2005-05-28T23:46:15+00:00

Some debug registers needed to be initialized early on to allow proper
support for KGDB.  Additionally, we need to setup the
ppc.md_early_serial_map function pointer on boards that have serial support
for KGDB.

Signed-off-by: Kumar Gala 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: Fix cpufreq vs. sleep issue

2005-05-28T18:14:01+00:00

Recent kernels occasionally trigger a PMU timeout on some mac laptops,
typically on wakeup from sleep.  This seem to be caused by either a too big
latency caused by the cpufreq switch on wakeup from sleep or by an
interrupt beeing lost due to the reset of the interrupt controller done
during wakeup.

This patch makes that code more robust by stopping PMU auto poll activity
around cpufreq changes on machines that use the PMU for such changes (long
latency switching involving a CPU hard reset and flush of all caches) and
by removing the reset of the open pic interrupt controller on wakeup (that
can cause the loss of an interrupt and Darwin doesn't do it, so it must not
be necessary).

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] ppc32: small cpufreq update

2005-05-28T18:13:59+00:00

This patch adds a missing attribute to pmac cpufreq so that
"scaling_available_frequencies" works.  It also cleans up the duplicate
definitions for low and high speed constants.

Signed-off-by: Benjamin Herrenschmidt 
Signed-off-by: John Clemens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds