Merge tag 'omap-for-v3.9/pm-wfi-take2-signed-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into late/omap

From Tony Lindgren:
omap pm wfi changes via Paul Walmsley <paul@pwsan.com>:

On OMAP2+ devices, standardize and clean up WFI entry and WFI blocking.

Basic test logs are available here:

   http://www.pwsan.com/omap/testlogs/wfi_devel_a_3.9/20130208085027/

Conflicts:
    arch/arm/mach-omap2/pm24xx.c

Note that this is based on earlier omap-for-v3.9/pm-signed because
of a non-trivial merge conflict. This branch also contains a fix
for c1d1cd59 ("ARM: OMAP2+: omap_device: remove obsolete pm_lats
and early_device code").

* tag 'omap-for-v3.9/pm-wfi-take2-signed-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: (25 commits)
  ARM: OMAP2+: fix some omap_device_build() calls that aren't compiled by default
  ARM: OMAP AM3517/05: hwmod data: block WFI when EMAC active
  ARM: OMAP2420: hwmod data/PM: use hwmod to block WFI when I2C active
  ARM: OMAP2+: hwmod: add support for blocking WFI when a device is active
  ARM: OMAP2xxx: PM: enter WFI via inline asm if CORE stays active
  ARM: OMAP2+: powerdomain: fix whitespace, improve flag comments
  ARM: OMAP2+: clockdomain: convert existing atomic usecounts into spinlock-protected shorts/ints
  ARM: OMAP2+: clockdomain: work on wkdep/sleepdep functions
  ARM: OMAP2xxx: CM: remove autodep handling
  ARM: OMAP2+: powerdomain/clockdomain: add a per-powerdomain spinlock
  ARM: OMAP2+: PM/powerdomain: move omap_set_pwrdm_state() to powerdomain code
  ARM: OMAP2: PM/powerdomain: drop unnecessary pwrdm_wait_transition()
  ARM: OMAP2xxx: PM: clean up some crufty powerstate programming code
  ARM: OMAP2+: clockdomain: add pwrdm_state_switch() call to clkdm_sleep()
  ARM: OMAP2+: powerdomain: fix powerdomain trace integration
  ARM: OMAP4: MPUSS PM: remove unnecessary shim functions for powerdomain control
  ARM: OMAP3xxx: CPUIdle: optimize __omap3_enter_idle()
  ARM: OMAP2420: hwmod data/PM: use hwmod to block WFI when I2C active
  ARM: OMAP2+: hwmod: add support for blocking WFI when a device is active
  ARM: OMAP3xxx: CPUIdle: simplify the PER next-state code
  ...

1 files changed, 9 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap_hwmod.h b/arch/arm/mach-omap2/omap_hwmod.h
index 3ae852a522f..80c00e706d6 100644
--- a/arch/arm/mach-omap2/omap_hwmod.h
+++ b/arch/arm/mach-omap2/omap_hwmod.h
@@ -451,6 +451,14 @@ struct omap_hwmod_omap4_prcm {
  *     enabled.  This prevents the hwmod code from being able to
  *     enable and reset the IP block early.  XXX Eventually it should
  *     be possible to query the clock framework for this information.
+ * HWMOD_BLOCK_WFI: Some OMAP peripherals apparently don't work
+ *     correctly if the MPU is allowed to go idle while the
+ *     peripherals are active.  This is apparently true for the I2C on
+ *     OMAP2420, and also the EMAC on AM3517/3505.  It's unlikely that
+ *     this is really true -- we're probably not configuring something
+ *     correctly, or this is being abused to deal with some PM latency
+ *     issues -- but we're currently suffering from a shortage of
+ *     folks who are able to track these issues down properly.
  */
 #define HWMOD_SWSUP_SIDLE			(1 << 0)
 #define HWMOD_SWSUP_MSTANDBY			(1 << 1)
@@ -462,6 +470,7 @@ struct omap_hwmod_omap4_prcm {
 #define HWMOD_CONTROL_OPT_CLKS_IN_RESET		(1 << 7)
 #define HWMOD_16BIT_REG				(1 << 8)
 #define HWMOD_EXT_OPT_MAIN_CLK			(1 << 9)
+#define HWMOD_BLOCK_WFI				(1 << 10)
 
 /*
  * omap_hwmod._int_flags definitions