linux/arch/powerpc/platforms/powermac
Benjamin Herrenschmidt 592a607bbc [POWERPC] Disable G5 NAP mode during SMU commands on U3
It appears that with the U3 northbridge, if the processor is in NAP
mode the whole time while waiting for an SMU command to complete,
then the SMU will fail.  It could be related to the weird backward
mechanism the SMU uses to get to system memory via i2c to the
northbridge that doesn't operate properly when the said bridge is
in napping along with the CPU.  That is on U3 at least, U4 doesn't
seem to be affected.

This didn't show before NO_HZ as the timer wakeup was enough to make
it work it seems, but that is no longer the case.

This fixes it by disabling NAP mode on those machines while
an SMU command is in flight.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2008-02-08 19:52:35 +11:00
..
backlight.c [POWERPC] Remove old interface find_devices 2007-04-24 22:09:02 +10:00
bootx_init.c [POWERPC] Remove old includes from arch/ppc 2007-08-22 22:39:35 -05:00
cache.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
cpufreq_32.c calibrate_delay() must be __cpuinit 2008-02-06 10:41:08 -08:00
cpufreq_64.c [CPUFREQ] move policy's governor initialisation out of low-level drivers into cpufreq core 2007-10-04 18:40:57 -04:00
feature.c [POWERPC] Disable G5 NAP mode during SMU commands on U3 2008-02-08 19:52:35 +11:00
Kconfig [POWERPC] disallow building powermac and tsi108 without PCI 2007-06-29 01:57:00 -05:00
low_i2c.c [POWERPC] powermac: Use machine_*_initcall() hooks in platform code 2008-01-17 14:57:14 +11:00
Makefile [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
nvram.c [POWERPC] Rename device_is_compatible to of_device_is_compatible 2007-05-07 20:31:14 +10:00
pci.c [POWERPC] Improve resource setup of PowerMac G5 HT bridge 2007-12-20 16:18:14 +11:00
pfunc_base.c [POWERPC] powermac: Use machine_*_initcall() hooks in platform code 2008-01-17 14:57:14 +11:00
pfunc_core.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00
pic.c Merge branch 'linux-2.6' 2008-01-31 11:25:51 +11:00
pic.h [POWERPC] Fix up after irq changes 2006-10-07 22:08:26 +10:00
pmac.h [POWERPC] Merge 32 and 64 bits pcibios_enable_device 2007-12-20 16:18:11 +11:00
setup.c [POWERPC] powermac: Use machine_*_initcall() hooks in platform code 2008-01-17 14:57:14 +11:00
sleep.S [POWERPC] Fix build breakage with CONFIG_PPC32 2006-10-23 18:23:17 +10:00
smp.c [POWERPC] Fix per-cpu allocation on oldworld SMP powermacs 2007-06-14 11:56:17 +10:00
time.c [POWERPC] powermac: Fix warning in time.c 2007-12-03 13:56:25 +11:00
udbg_adb.c [POWERPC] Fix section mismatches in udbg_adb.c 2007-08-17 11:02:06 +10:00
udbg_scc.c [POWERPC] Rename get_property to of_get_property: arch/powerpc 2007-04-13 03:55:19 +10:00