OMAP3: PM: fix IO daisy chain enable to use PM_WKEN reg

Checking to se if the IO daisy chain is enabled should be checking the PM_WKEN register, not the PM_WKST register. Reading PM_WKST tells us if an event occurred, not whether or not it is enabled.

Apparently, we've been lucky until now in that a pending event has not been there during enable. However, on 3630/Zoom3, I noticed because of the WARN that this timeout was always happening.

---
Applies to mainline v2.6.35-rc1, also in my pm-fixes branch.

 arch/arm/mach-omap2/pm34xx.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

index 2e96771..b88737f 100644
@@ -99,7 +99,7 @@ static void omap3_enable_io_chain(void)
 		/* Do a readback to assure write has been done */
 		prm_read_mod_reg(WKUP_MOD, PM_WKEN);
 
-		while (!(prm_read_mod_reg(WKUP_MOD, PM_WKST) &
+		while (!(prm_read_mod_reg(WKUP_MOD, PM_WKEN) &
 			 OMAP3430_ST_IO_CHAIN_MASK)) {
 			timeout++;
 			if (timeout > 1000) {

@@ -108,7 +108,7 @@ static void omap3_enable_io_chain(void)
 				return;
 			}
 			prm_set_mod_reg_bits(OMAP3430_ST_IO_CHAIN_MASK,
-					     WKUP_MOD, PM_WKST);
+					     WKUP_MOD, PM_WKEN);
 		}
 	}
 }

1.7.0.2

This patch has been applied to the linux-omap
by youw fwiendly patch wobot.

Branch in linux-omap: omap-fixes

Initial commit ID (Likely to change): 4f4348dafd232a570641266e326c044abe5709fe

PatchWorks
http://patchwork.kernel.org/patch/104143/

Git (Likely to change, and takes a while to get mirrored)
http://git.kernel.org/?p=linux/kernel/git/tmlind/linux-omap-2.6.git;a=commit;h=4f4348dafd232a570641266e326c044abe5709fe