Merge branch 'hwmod_clockevent_2.6.39' of git://git.pwsan.com/linux-2…

….6 into omap-for-linus

arch/arm/mach-omap2/omap_hwmod.c

@@ -1,7 +1,7 @@
 /*
  * omap_hwmod implementation for OMAP2/3/4
  *
- * Copyright (C) 2009-2010 Nokia Corporation
+ * Copyright (C) 2009-2011 Nokia Corporation
  *
  * Paul Walmsley, Benoît Cousson, Kevin Hilman
  *
@@ -162,9 +162,6 @@ static LIST_HEAD(omap_hwmod_list);
 /* mpu_oh: used to add/remove MPU initiator from sleepdep list */
 static struct omap_hwmod *mpu_oh;
 
-/* inited: 0 if omap_hwmod_init() has not yet been called; 1 otherwise */
-static u8 inited;
-
 
 /* Private functions */
 
@@ -904,18 +901,16 @@ static struct omap_hwmod *_lookup(const char *name)
  * @oh: struct omap_hwmod *
  * @data: not used; pass NULL
  *
- * Called by omap_hwmod_late_init() (after omap2_clk_init()).
- * Resolves all clock names embedded in the hwmod.  Returns -EINVAL if
- * the omap_hwmod has not yet been registered or if the clocks have
- * already been initialized, 0 on success, or a non-zero error on
- * failure.
+ * Called by omap_hwmod_setup_*() (after omap2_clk_init()).
+ * Resolves all clock names embedded in the hwmod.  Returns 0 on
+ * success, or a negative error code on failure.
  */
 static int _init_clocks(struct omap_hwmod *oh, void *data)
 {
 	int ret = 0;
 
-	if (!oh || (oh->_state != _HWMOD_STATE_REGISTERED))
-		return -EINVAL;
+	if (oh->_state != _HWMOD_STATE_REGISTERED)
+		return 0;
 
 	pr_debug("omap_hwmod: %s: looking up clocks\n", oh->name);
 
@@ -1354,14 +1349,16 @@ static int _shutdown(struct omap_hwmod *oh)
  * @oh: struct omap_hwmod *
  *
  * Writes the CLOCKACTIVITY bits @clockact to the hwmod @oh
- * OCP_SYSCONFIG register.  Returns -EINVAL if the hwmod is in the
- * wrong state or returns 0.
+ * OCP_SYSCONFIG register.  Returns 0.
  */
 static int _setup(struct omap_hwmod *oh, void *data)
 {
 	int i, r;
 	u8 postsetup_state;
 
+	if (oh->_state != _HWMOD_STATE_CLKS_INITED)
+		return 0;
+
 	/* Set iclk autoidle mode */
 	if (oh->slaves_cnt > 0) {
 		for (i = 0; i < oh->slaves_cnt; i++) {
@@ -1455,7 +1452,7 @@ static int _setup(struct omap_hwmod *oh, void *data)
  */
 static int __init _register(struct omap_hwmod *oh)
 {
-	int ret, ms_id;
+	int ms_id;
 
 	if (!oh || !oh->name || !oh->class || !oh->class->name ||
 	    (oh->_state != _HWMOD_STATE_UNKNOWN))
@@ -1478,9 +1475,14 @@ static int __init _register(struct omap_hwmod *oh)
 
 	oh->_state = _HWMOD_STATE_REGISTERED;
 
-	ret = 0;
+	/*
+	 * XXX Rather than doing a strcmp(), this should test a flag
+	 * set in the hwmod data, inserted by the autogenerator code.
+	 */
+	if (!strcmp(oh->name, MPU_INITIATOR_NAME))
+		mpu_oh = oh;
 
-	return ret;
+	return 0;
 }
 
 
@@ -1583,51 +1585,45 @@ int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
 	return ret;
 }
 
-
 /**
- * omap_hwmod_init - init omap_hwmod code and register hwmods
+ * omap_hwmod_register - register an array of hwmods
  * @ohs: pointer to an array of omap_hwmods to register
  *
  * Intended to be called early in boot before the clock framework is
  * initialized.  If @ohs is not null, will register all omap_hwmods
- * listed in @ohs that are valid for this chip.  Returns -EINVAL if
- * omap_hwmod_init() has already been called or 0 otherwise.
+ * listed in @ohs that are valid for this chip.  Returns 0.
  */
-int __init omap_hwmod_init(struct omap_hwmod **ohs)
+int __init omap_hwmod_register(struct omap_hwmod **ohs)
 {
-	struct omap_hwmod *oh;
-	int r;
-
-	if (inited)
-		return -EINVAL;
-
-	inited = 1;
+	int r, i;
 
 	if (!ohs)
 		return 0;
 
-	oh = *ohs;
-	while (oh) {
-		if (omap_chip_is(oh->omap_chip)) {
-			r = _register(oh);
-			WARN(r, "omap_hwmod: %s: _register returned "
-			     "%d\n", oh->name, r);
-		}
-		oh = *++ohs;
-	}
+	i = 0;
+	do {
+		if (!omap_chip_is(ohs[i]->omap_chip))
+			continue;
+
+		r = _register(ohs[i]);
+		WARN(r, "omap_hwmod: %s: _register returned %d\n", ohs[i]->name,
+		     r);
+	} while (ohs[++i]);
 
 	return 0;
 }
 
 /*
  * _populate_mpu_rt_base - populate the virtual address for a hwmod
  *
- * Must be called only from omap_hwmod_late_init so ioremap works properly.
+ * Must be called only from omap_hwmod_setup_*() so ioremap works properly.
  * Assumes the caller takes care of locking if needed.
- *
  */
 static int __init _populate_mpu_rt_base(struct omap_hwmod *oh, void *data)
 {
+	if (oh->_state != _HWMOD_STATE_REGISTERED)
+		return 0;
+
 	if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
 		return 0;
 
@@ -1640,31 +1636,81 @@ static int __init _populate_mpu_rt_base(struct omap_hwmod *oh, void *data)
 }
 
 /**
- * omap_hwmod_late_init - do some post-clock framework initialization
+ * omap_hwmod_setup_one - set up a single hwmod
+ * @oh_name: const char * name of the already-registered hwmod to set up
+ *
+ * Must be called after omap2_clk_init().  Resolves the struct clk
+ * names to struct clk pointers for each registered omap_hwmod.  Also
+ * calls _setup() on each hwmod.  Returns -EINVAL upon error or 0 upon
+ * success.
+ */
+int __init omap_hwmod_setup_one(const char *oh_name)
+{
+	struct omap_hwmod *oh;
+	int r;
+
+	pr_debug("omap_hwmod: %s: %s\n", oh_name, __func__);
+
+	if (!mpu_oh) {
+		pr_err("omap_hwmod: %s: cannot setup_one: MPU initiator hwmod %s not yet registered\n",
+		       oh_name, MPU_INITIATOR_NAME);
+		return -EINVAL;
+	}
+
+	oh = _lookup(oh_name);
+	if (!oh) {
+		WARN(1, "omap_hwmod: %s: hwmod not yet registered\n", oh_name);
+		return -EINVAL;
+	}
+
+	if (mpu_oh->_state == _HWMOD_STATE_REGISTERED && oh != mpu_oh)
+		omap_hwmod_setup_one(MPU_INITIATOR_NAME);
+
+	r = _populate_mpu_rt_base(oh, NULL);
+	if (IS_ERR_VALUE(r)) {
+		WARN(1, "omap_hwmod: %s: couldn't set mpu_rt_base\n", oh_name);
+		return -EINVAL;
+	}
+
+	r = _init_clocks(oh, NULL);
+	if (IS_ERR_VALUE(r)) {
+		WARN(1, "omap_hwmod: %s: couldn't init clocks\n", oh_name);
+		return -EINVAL;
+	}
+
+	_setup(oh, NULL);
+
+	return 0;
+}
+
+/**
+ * omap_hwmod_setup - do some post-clock framework initialization
  *
  * Must be called after omap2_clk_init().  Resolves the struct clk names
  * to struct clk pointers for each registered omap_hwmod.  Also calls
- * _setup() on each hwmod.  Returns 0.
+ * _setup() on each hwmod.  Returns 0 upon success.
  */
-static int __init omap_hwmod_late_init(void)
+static int __init omap_hwmod_setup_all(void)
 {
 	int r;
 
+	if (!mpu_oh) {
+		pr_err("omap_hwmod: %s: MPU initiator hwmod %s not yet registered\n",
+		       __func__, MPU_INITIATOR_NAME);
+		return -EINVAL;
+	}
+
 	r = omap_hwmod_for_each(_populate_mpu_rt_base, NULL);
 
-	/* XXX check return value */
 	r = omap_hwmod_for_each(_init_clocks, NULL);
-	WARN(r, "omap_hwmod: omap_hwmod_late_init(): _init_clocks failed\n");
-
-	mpu_oh = omap_hwmod_lookup(MPU_INITIATOR_NAME);
-	WARN(!mpu_oh, "omap_hwmod: could not find MPU initiator hwmod %s\n",
-	     MPU_INITIATOR_NAME);
+	WARN(IS_ERR_VALUE(r),
+	     "omap_hwmod: %s: _init_clocks failed\n", __func__);
 
 	omap_hwmod_for_each(_setup, NULL);
 
 	return 0;
 }
-core_initcall(omap_hwmod_late_init);
+core_initcall(omap_hwmod_setup_all);
 
 /**
  * omap_hwmod_enable - enable an omap_hwmod
@@ -2183,11 +2229,11 @@ int omap_hwmod_for_each_by_class(const char *classname,
  * @oh: struct omap_hwmod *
  * @state: state that _setup() should leave the hwmod in
  *
- * Sets the hwmod state that @oh will enter at the end of _setup() (called by
- * omap_hwmod_late_init()).  Only valid to call between calls to
- * omap_hwmod_init() and omap_hwmod_late_init().  Returns 0 upon success or
- * -EINVAL if there is a problem with the arguments or if the hwmod is
- * in the wrong state.
+ * Sets the hwmod state that @oh will enter at the end of _setup()
+ * (called by omap_hwmod_setup_*()).  Only valid to call between
+ * calling omap_hwmod_register() and omap_hwmod_setup_*().  Returns
+ * 0 upon success or -EINVAL if there is a problem with the arguments
+ * or if the hwmod is in the wrong state.
  */
 int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state)
 {