From bebf3cb9acf3af05b9806624edb56ce015076551 Mon Sep 17 00:00:00 2001
From: Benoit Cousson <b-cousson@ti.com>
Date: Tue, 21 Sep 2010 18:57:59 +0200
Subject: [PATCH] --- yaml --- r: 216857 b: refs/heads/master c:
 2cb068149c365f1c2b10f2ece6786139527dcc16 h: refs/heads/master i:   216855:
 aafba9d625ff58484384976cb8b71317d52c8ac3 v: v3

---
 [refs]                                        |  2 +-
 trunk/arch/arm/mach-omap2/omap_hwmod.c        | 22 ++++++++++++++-----
 .../arm/plat-omap/include/plat/omap_hwmod.h   |  3 ++-
 3 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/[refs] b/[refs]
index 588cc92160c6..85ba870df83b 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: aee48e3c9cee3698d17b4cf4203551de0a804760
+refs/heads/master: 2cb068149c365f1c2b10f2ece6786139527dcc16
diff --git a/trunk/arch/arm/mach-omap2/omap_hwmod.c b/trunk/arch/arm/mach-omap2/omap_hwmod.c
index 8c279235ea87..5027879b062f 100644
--- a/trunk/arch/arm/mach-omap2/omap_hwmod.c
+++ b/trunk/arch/arm/mach-omap2/omap_hwmod.c
@@ -967,6 +967,12 @@ static int _read_hardreset(struct omap_hwmod *oh, const char *name)
  * enabled for this to work.  Returns -EINVAL if the hwmod cannot be
  * reset this way or if the hwmod is in the wrong state, -ETIMEDOUT if
  * the module did not reset in time, or 0 upon success.
+ *
+ * In OMAP3 a specific SYSSTATUS register is used to get the reset status.
+ * Starting in OMAP4, some IPs does not have SYSSTATUS register and instead
+ * use the SYSCONFIG softreset bit to provide the status.
+ *
+ * Note that some IP like McBSP does have a reset control but no reset status.
  */
 static int _reset(struct omap_hwmod *oh)
 {
@@ -974,8 +980,7 @@ static int _reset(struct omap_hwmod *oh)
 	int c = 0;
 
 	if (!oh->class->sysc ||
-	    !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET) ||
-	    (oh->class->sysc->sysc_flags & SYSS_MISSING))
+	    !(oh->class->sysc->sysc_flags & SYSC_HAS_SOFTRESET))
 		return -EINVAL;
 
 	/* clocks must be on for this operation */
@@ -993,9 +998,16 @@ static int _reset(struct omap_hwmod *oh)
 		return r;
 	_write_sysconfig(v, oh);
 
-	omap_test_timeout((omap_hwmod_readl(oh, oh->class->sysc->syss_offs) &
-			   SYSS_RESETDONE_MASK),
-			  MAX_MODULE_SOFTRESET_WAIT, c);
+	if (oh->class->sysc->sysc_flags & SYSS_HAS_RESET_STATUS)
+		omap_test_timeout((omap_hwmod_readl(oh,
+						    oh->class->sysc->syss_offs)
+				   & SYSS_RESETDONE_MASK),
+				  MAX_MODULE_SOFTRESET_WAIT, c);
+	else if (oh->class->sysc->sysc_flags & SYSC_HAS_RESET_STATUS)
+		omap_test_timeout(!(omap_hwmod_readl(oh,
+						     oh->class->sysc->sysc_offs)
+				   & SYSC_TYPE2_SOFTRESET_MASK),
+				  MAX_MODULE_SOFTRESET_WAIT, c);
 
 	if (c == MAX_MODULE_SOFTRESET_WAIT)
 		pr_warning("omap_hwmod: %s: softreset failed (waited %d usec)\n",
diff --git a/trunk/arch/arm/plat-omap/include/plat/omap_hwmod.h b/trunk/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 7fde44d3c248..faa08273b1e4 100644
--- a/trunk/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/trunk/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -251,8 +251,9 @@ struct omap_hwmod_ocp_if {
 #define SYSC_HAS_CLOCKACTIVITY	(1 << 4)
 #define SYSC_HAS_SIDLEMODE	(1 << 5)
 #define SYSC_HAS_MIDLEMODE	(1 << 6)
-#define SYSS_MISSING		(1 << 7)
+#define SYSS_HAS_RESET_STATUS	(1 << 7)
 #define SYSC_NO_CACHE		(1 << 8)  /* XXX SW flag, belongs elsewhere */
+#define SYSC_HAS_RESET_STATUS	(1 << 9)
 
 /* omap_hwmod_sysconfig.clockact flags */
 #define CLOCKACT_TEST_BOTH	0x0