X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Farm%2Fmach-omap2%2Fomap_hwmod.c;h=84cc0bdda3aecd0d5065f7d3a0b471f3eb524383;hb=333c066bb76f1f270ca77f16afe198e54e352c83;hp=293fa6cd50e14192cf075e1b9f9937c307b7c2e4;hpb=a91f423e598912ab301592c7759cfd89e10682a1;p=pandora-kernel.git

diff --git a/arch/arm/mach-omap2/omap_hwmod.c b/arch/arm/mach-omap2/omap_hwmod.c
index 293fa6cd50e1..84cc0bdda3ae 100644
--- a/arch/arm/mach-omap2/omap_hwmod.c
+++ b/arch/arm/mach-omap2/omap_hwmod.c
@@ -2,6 +2,7 @@
  * omap_hwmod implementation for OMAP2/3/4
  *
  * Copyright (C) 2009-2011 Nokia Corporation
+ * Copyright (C) 2011 Texas Instruments, Inc.
  *
  * Paul Walmsley, Benoît Cousson, Kevin Hilman
  *
@@ -145,9 +146,10 @@
 #include <plat/prcm.h>
 
 #include "cm2xxx_3xxx.h"
-#include "cm44xx.h"
+#include "cminst44xx.h"
 #include "prm2xxx_3xxx.h"
 #include "prm44xx.h"
+#include "prminst44xx.h"
 #include "mux.h"
 
 /* Maximum microseconds to wait for OMAP module to softreset */
@@ -387,11 +389,10 @@ static int _set_module_autoidle(struct omap_hwmod *oh, u8 autoidle,
  */
 static int _enable_wakeup(struct omap_hwmod *oh, u32 *v)
 {
-	u32 wakeup_mask;
-
 	if (!oh->class->sysc ||
 	    !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) ||
-	      (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)))
+	      (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) ||
+	      (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)))
 		return -EINVAL;
 
 	if (!oh->class->sysc->sysc_fields) {
@@ -399,12 +400,13 @@ static int _enable_wakeup(struct omap_hwmod *oh, u32 *v)
 		return -EINVAL;
 	}
 
-	wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift);
-
-	*v |= wakeup_mask;
+	if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)
+		*v |= 0x1 << oh->class->sysc->sysc_fields->enwkup_shift;
 
 	if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
 		_set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
+	if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
+		_set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
 
 	/* XXX test pwrdm_get_wken for this hwmod's subsystem */
 
@@ -422,11 +424,10 @@ static int _enable_wakeup(struct omap_hwmod *oh, u32 *v)
  */
 static int _disable_wakeup(struct omap_hwmod *oh, u32 *v)
 {
-	u32 wakeup_mask;
-
 	if (!oh->class->sysc ||
 	    !((oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP) ||
-	      (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)))
+	      (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP) ||
+	      (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)))
 		return -EINVAL;
 
 	if (!oh->class->sysc->sysc_fields) {
@@ -434,12 +435,13 @@ static int _disable_wakeup(struct omap_hwmod *oh, u32 *v)
 		return -EINVAL;
 	}
 
-	wakeup_mask = (0x1 << oh->class->sysc->sysc_fields->enwkup_shift);
-
-	*v &= ~wakeup_mask;
+	if (oh->class->sysc->sysc_flags & SYSC_HAS_ENAWAKEUP)
+		*v &= ~(0x1 << oh->class->sysc->sysc_fields->enwkup_shift);
 
 	if (oh->class->sysc->idlemodes & SIDLE_SMART_WKUP)
 		_set_slave_idlemode(oh, HWMOD_IDLEMODE_SMART, v);
+	if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
+		_set_master_standbymode(oh, HWMOD_IDLEMODE_SMART_WKUP, v);
 
 	/* XXX test pwrdm_get_wken for this hwmod's subsystem */
 
@@ -677,6 +679,125 @@ static void _disable_optional_clocks(struct omap_hwmod *oh)
 		}
 }
 
+/**
+ * _enable_module - enable CLKCTRL modulemode on OMAP4
+ * @oh: struct omap_hwmod *
+ *
+ * Enables the PRCM module mode related to the hwmod @oh.
+ * No return value.
+ */
+static void _enable_module(struct omap_hwmod *oh)
+{
+	/* The module mode does not exist prior OMAP4 */
+	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+		return;
+
+	if (!oh->clkdm || !oh->prcm.omap4.modulemode)
+		return;
+
+	pr_debug("omap_hwmod: %s: _enable_module: %d\n",
+		 oh->name, oh->prcm.omap4.modulemode);
+
+	omap4_cminst_module_enable(oh->prcm.omap4.modulemode,
+				   oh->clkdm->prcm_partition,
+				   oh->clkdm->cm_inst,
+				   oh->clkdm->clkdm_offs,
+				   oh->prcm.omap4.clkctrl_offs);
+}
+
+/**
+ * _disable_module - enable CLKCTRL modulemode on OMAP4
+ * @oh: struct omap_hwmod *
+ *
+ * Disable the PRCM module mode related to the hwmod @oh.
+ * No return value.
+ */
+static void _disable_module(struct omap_hwmod *oh)
+{
+	/* The module mode does not exist prior OMAP4 */
+	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+		return;
+
+	if (!oh->clkdm || !oh->prcm.omap4.modulemode)
+		return;
+
+	pr_debug("omap_hwmod: %s: _disable_module\n", oh->name);
+
+	omap4_cminst_module_disable(oh->clkdm->prcm_partition,
+				    oh->clkdm->cm_inst,
+				    oh->clkdm->clkdm_offs,
+				    oh->prcm.omap4.clkctrl_offs);
+}
+
+/**
+ * _count_mpu_irqs - count the number of MPU IRQ lines associated with @oh
+ * @oh: struct omap_hwmod *oh
+ *
+ * Count and return the number of MPU IRQs associated with the hwmod
+ * @oh.  Used to allocate struct resource data.  Returns 0 if @oh is
+ * NULL.
+ */
+static int _count_mpu_irqs(struct omap_hwmod *oh)
+{
+	struct omap_hwmod_irq_info *ohii;
+	int i = 0;
+
+	if (!oh || !oh->mpu_irqs)
+		return 0;
+
+	do {
+		ohii = &oh->mpu_irqs[i++];
+	} while (ohii->irq != -1);
+
+	return i;
+}
+
+/**
+ * _count_sdma_reqs - count the number of SDMA request lines associated with @oh
+ * @oh: struct omap_hwmod *oh
+ *
+ * Count and return the number of SDMA request lines associated with
+ * the hwmod @oh.  Used to allocate struct resource data.  Returns 0
+ * if @oh is NULL.
+ */
+static int _count_sdma_reqs(struct omap_hwmod *oh)
+{
+	struct omap_hwmod_dma_info *ohdi;
+	int i = 0;
+
+	if (!oh || !oh->sdma_reqs)
+		return 0;
+
+	do {
+		ohdi = &oh->sdma_reqs[i++];
+	} while (ohdi->dma_req != -1);
+
+	return i;
+}
+
+/**
+ * _count_ocp_if_addr_spaces - count the number of address space entries for @oh
+ * @oh: struct omap_hwmod *oh
+ *
+ * Count and return the number of address space ranges associated with
+ * the hwmod @oh.  Used to allocate struct resource data.  Returns 0
+ * if @oh is NULL.
+ */
+static int _count_ocp_if_addr_spaces(struct omap_hwmod_ocp_if *os)
+{
+	struct omap_hwmod_addr_space *mem;
+	int i = 0;
+
+	if (!os || !os->addr)
+		return 0;
+
+	do {
+		mem = &os->addr[i++];
+	} while (mem->pa_start != mem->pa_end);
+
+	return i;
+}
+
 /**
  * _find_mpu_port_index - find hwmod OCP slave port ID intended for MPU use
  * @oh: struct omap_hwmod *
@@ -722,8 +843,7 @@ static void __iomem * __init _find_mpu_rt_base(struct omap_hwmod *oh, u8 index)
 {
 	struct omap_hwmod_ocp_if *os;
 	struct omap_hwmod_addr_space *mem;
-	int i;
-	int found = 0;
+	int i = 0, found = 0;
 	void __iomem *va_start;
 
 	if (!oh || oh->slaves_cnt == 0)
@@ -731,12 +851,14 @@ static void __iomem * __init _find_mpu_rt_base(struct omap_hwmod *oh, u8 index)
 
 	os = oh->slaves[index];
 
-	for (i = 0, mem = os->addr; i < os->addr_cnt; i++, mem++) {
-		if (mem->flags & ADDR_TYPE_RT) {
+	if (!os->addr)
+		return NULL;
+
+	do {
+		mem = &os->addr[i++];
+		if (mem->flags & ADDR_TYPE_RT)
 			found = 1;
-			break;
-		}
-	}
+	} while (!found && mem->pa_start != mem->pa_end);
 
 	if (found) {
 		va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
@@ -781,8 +903,16 @@ static void _enable_sysc(struct omap_hwmod *oh)
 	}
 
 	if (sf & SYSC_HAS_MIDLEMODE) {
-		idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ?
-			HWMOD_IDLEMODE_NO : HWMOD_IDLEMODE_SMART;
+		if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
+			idlemode = HWMOD_IDLEMODE_NO;
+		} else {
+			if (sf & SYSC_HAS_ENAWAKEUP)
+				_enable_wakeup(oh, &v);
+			if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
+				idlemode = HWMOD_IDLEMODE_SMART_WKUP;
+			else
+				idlemode = HWMOD_IDLEMODE_SMART;
+		}
 		_set_master_standbymode(oh, idlemode, &v);
 	}
 
@@ -840,8 +970,16 @@ static void _idle_sysc(struct omap_hwmod *oh)
 	}
 
 	if (sf & SYSC_HAS_MIDLEMODE) {
-		idlemode = (oh->flags & HWMOD_SWSUP_MSTANDBY) ?
-			HWMOD_IDLEMODE_FORCE : HWMOD_IDLEMODE_SMART;
+		if (oh->flags & HWMOD_SWSUP_MSTANDBY) {
+			idlemode = HWMOD_IDLEMODE_FORCE;
+		} else {
+			if (sf & SYSC_HAS_ENAWAKEUP)
+				_enable_wakeup(oh, &v);
+			if (oh->class->sysc->idlemodes & MSTANDBY_SMART_WKUP)
+				idlemode = HWMOD_IDLEMODE_SMART_WKUP;
+			else
+				idlemode = HWMOD_IDLEMODE_SMART;
+		}
 		_set_master_standbymode(oh, idlemode, &v);
 	}
 
@@ -903,9 +1041,40 @@ static struct omap_hwmod *_lookup(const char *name)
 
 	return oh;
 }
+/**
+ * _init_clkdm - look up a clockdomain name, store pointer in omap_hwmod
+ * @oh: struct omap_hwmod *
+ *
+ * Convert a clockdomain name stored in a struct omap_hwmod into a
+ * clockdomain pointer, and save it into the struct omap_hwmod.
+ * return -EINVAL if clkdm_name does not exist or if the lookup failed.
+ */
+static int _init_clkdm(struct omap_hwmod *oh)
+{
+	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+		return 0;
+
+	if (!oh->clkdm_name) {
+		pr_warning("omap_hwmod: %s: no clkdm_name\n", oh->name);
+		return -EINVAL;
+	}
+
+	oh->clkdm = clkdm_lookup(oh->clkdm_name);
+	if (!oh->clkdm) {
+		pr_warning("omap_hwmod: %s: could not associate to clkdm %s\n",
+			oh->name, oh->clkdm_name);
+		return -EINVAL;
+	}
+
+	pr_debug("omap_hwmod: %s: associated to clkdm %s\n",
+		oh->name, oh->clkdm_name);
+
+	return 0;
+}
 
 /**
- * _init_clocks - clk_get() all clocks associated with this hwmod
+ * _init_clocks - clk_get() all clocks associated with this hwmod. Retrieve as
+ * well the clockdomain.
  * @oh: struct omap_hwmod *
  * @data: not used; pass NULL
  *
@@ -925,9 +1094,12 @@ static int _init_clocks(struct omap_hwmod *oh, void *data)
 	ret |= _init_main_clk(oh);
 	ret |= _init_interface_clks(oh);
 	ret |= _init_opt_clks(oh);
+	ret |= _init_clkdm(oh);
 
 	if (!ret)
 		oh->_state = _HWMOD_STATE_CLKS_INITED;
+	else
+		pr_warning("omap_hwmod: %s: cannot _init_clocks\n", oh->name);
 
 	return ret;
 }
@@ -939,7 +1111,7 @@ static int _init_clocks(struct omap_hwmod *oh, void *data)
  * Wait for a module @oh to leave slave idle.  Returns 0 if the module
  * does not have an IDLEST bit or if the module successfully leaves
  * slave idle; otherwise, pass along the return value of the
- * appropriate *_cm_wait_module_ready() function.
+ * appropriate *_cm*_wait_module_ready() function.
  */
 static int _wait_target_ready(struct omap_hwmod *oh)
 {
@@ -966,7 +1138,13 @@ static int _wait_target_ready(struct omap_hwmod *oh)
 						 oh->prcm.omap2.idlest_reg_id,
 						 oh->prcm.omap2.idlest_idle_bit);
 	} else if (cpu_is_omap44xx()) {
-		ret = omap4_cm_wait_module_ready(oh->prcm.omap4.clkctrl_reg);
+		if (!oh->clkdm)
+			return -EINVAL;
+
+		ret = omap4_cminst_wait_module_ready(oh->clkdm->prcm_partition,
+						     oh->clkdm->cm_inst,
+						     oh->clkdm->clkdm_offs,
+						     oh->prcm.omap4.clkctrl_offs);
 	} else {
 		BUG();
 	};
@@ -974,6 +1152,36 @@ static int _wait_target_ready(struct omap_hwmod *oh)
 	return ret;
 }
 
+/**
+ * _wait_target_disable - wait for a module to be disabled
+ * @oh: struct omap_hwmod *
+ *
+ * Wait for a module @oh to enter slave idle.  Returns 0 if the module
+ * does not have an IDLEST bit or if the module successfully enters
+ * slave idle; otherwise, pass along the return value of the
+ * appropriate *_cm*_wait_module_idle() function.
+ */
+static int _wait_target_disable(struct omap_hwmod *oh)
+{
+	/* TODO: For now just handle OMAP4+ */
+	if (cpu_is_omap24xx() || cpu_is_omap34xx())
+		return 0;
+
+	if (!oh)
+		return -EINVAL;
+
+	if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
+		return 0;
+
+	if (oh->flags & HWMOD_NO_IDLEST)
+		return 0;
+
+	return omap4_cminst_wait_module_idle(oh->clkdm->prcm_partition,
+					     oh->clkdm->cm_inst,
+					     oh->clkdm->clkdm_offs,
+					     oh->prcm.omap4.clkctrl_offs);
+}
+
 /**
  * _lookup_hardreset - fill register bit info for this hwmod/reset line
  * @oh: struct omap_hwmod *
@@ -1030,8 +1238,10 @@ static int _assert_hardreset(struct omap_hwmod *oh, const char *name)
 		return omap2_prm_assert_hardreset(oh->prcm.omap2.module_offs,
 						  ohri.rst_shift);
 	else if (cpu_is_omap44xx())
-		return omap4_prm_assert_hardreset(oh->prcm.omap4.rstctrl_reg,
-						  ohri.rst_shift);
+		return omap4_prminst_assert_hardreset(ohri.rst_shift,
+				  oh->clkdm->pwrdm.ptr->prcm_partition,
+				  oh->clkdm->pwrdm.ptr->prcm_offs,
+				  oh->prcm.omap4.rstctrl_offs);
 	else
 		return -EINVAL;
 }
@@ -1066,8 +1276,10 @@ static int _deassert_hardreset(struct omap_hwmod *oh, const char *name)
 		if (ohri.st_shift)
 			pr_err("omap_hwmod: %s: %s: hwmod data error: OMAP4 does not support st_shift\n",
 			       oh->name, name);
-		ret = omap4_prm_deassert_hardreset(oh->prcm.omap4.rstctrl_reg,
-						   ohri.rst_shift);
+		ret = omap4_prminst_deassert_hardreset(ohri.rst_shift,
+				  oh->clkdm->pwrdm.ptr->prcm_partition,
+				  oh->clkdm->pwrdm.ptr->prcm_offs,
+				  oh->prcm.omap4.rstctrl_offs);
 	} else {
 		return -EINVAL;
 	}
@@ -1102,8 +1314,10 @@ static int _read_hardreset(struct omap_hwmod *oh, const char *name)
 		return omap2_prm_is_hardreset_asserted(oh->prcm.omap2.module_offs,
 						       ohri.st_shift);
 	} else if (cpu_is_omap44xx()) {
-		return omap4_prm_is_hardreset_asserted(oh->prcm.omap4.rstctrl_reg,
-						       ohri.rst_shift);
+		return omap4_prminst_is_hardreset_asserted(ohri.rst_shift,
+				  oh->clkdm->pwrdm.ptr->prcm_partition,
+				  oh->clkdm->pwrdm.ptr->prcm_offs,
+				  oh->prcm.omap4.rstctrl_offs);
 	} else {
 		return -EINVAL;
 	}
@@ -1223,6 +1437,9 @@ static int _reset(struct omap_hwmod *oh)
 static int _enable(struct omap_hwmod *oh)
 {
 	int r;
+	int hwsup = 0;
+
+	pr_debug("omap_hwmod: %s: enabling\n", oh->name);
 
 	if (oh->_state != _HWMOD_STATE_INITIALIZED &&
 	    oh->_state != _HWMOD_STATE_IDLE &&
@@ -1232,11 +1449,10 @@ static int _enable(struct omap_hwmod *oh)
 		return -EINVAL;
 	}
 
-	pr_debug("omap_hwmod: %s: enabling\n", oh->name);
 
 	/*
 	 * If an IP contains only one HW reset line, then de-assert it in order
-	 * to allow to enable the clocks. Otherwise the PRCM will return
+	 * to allow the module state transition. Otherwise the PRCM will return
 	 * Intransition status, and the init will failed.
 	 */
 	if ((oh->_state == _HWMOD_STATE_INITIALIZED ||
@@ -1250,10 +1466,34 @@ static int _enable(struct omap_hwmod *oh)
 		omap_hwmod_mux(oh->mux, _HWMOD_STATE_ENABLED);
 
 	_add_initiator_dep(oh, mpu_oh);
+
+	if (oh->clkdm) {
+		/*
+		 * A clockdomain must be in SW_SUP before enabling
+		 * completely the module. The clockdomain can be set
+		 * in HW_AUTO only when the module become ready.
+		 */
+		hwsup = clkdm_in_hwsup(oh->clkdm);
+		r = clkdm_hwmod_enable(oh->clkdm, oh);
+		if (r) {
+			WARN(1, "omap_hwmod: %s: could not enable clockdomain %s: %d\n",
+			     oh->name, oh->clkdm->name, r);
+			return r;
+		}
+	}
+
 	_enable_clocks(oh);
+	_enable_module(oh);
 
 	r = _wait_target_ready(oh);
 	if (!r) {
+		/*
+		 * Set the clockdomain to HW_AUTO only if the target is ready,
+		 * assuming that the previous state was HW_AUTO
+		 */
+		if (oh->clkdm && hwsup)
+			clkdm_allow_idle(oh->clkdm);
+
 		oh->_state = _HWMOD_STATE_ENABLED;
 
 		/* Access the sysconfig only if the target is ready */
@@ -1266,6 +1506,9 @@ static int _enable(struct omap_hwmod *oh)
 		_disable_clocks(oh);
 		pr_debug("omap_hwmod: %s: _wait_target_ready: %d\n",
 			 oh->name, r);
+
+		if (oh->clkdm)
+			clkdm_hwmod_disable(oh->clkdm, oh);
 	}
 
 	return r;
@@ -1281,18 +1524,33 @@ static int _enable(struct omap_hwmod *oh)
  */
 static int _idle(struct omap_hwmod *oh)
 {
+	int ret;
+
+	pr_debug("omap_hwmod: %s: idling\n", oh->name);
+
 	if (oh->_state != _HWMOD_STATE_ENABLED) {
 		WARN(1, "omap_hwmod: %s: idle state can only be entered from "
 		     "enabled state\n", oh->name);
 		return -EINVAL;
 	}
 
-	pr_debug("omap_hwmod: %s: idling\n", oh->name);
-
 	if (oh->class->sysc)
 		_idle_sysc(oh);
 	_del_initiator_dep(oh, mpu_oh);
+	_disable_module(oh);
+	ret = _wait_target_disable(oh);
+	if (ret)
+		pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
+			oh->name);
+	/*
+	 * The module must be in idle mode before disabling any parents
+	 * clocks. Otherwise, the parent clock might be disabled before
+	 * the module transition is done, and thus will prevent the
+	 * transition to complete properly.
+	 */
 	_disable_clocks(oh);
+	if (oh->clkdm)
+		clkdm_hwmod_disable(oh->clkdm, oh);
 
 	/* Mux pins for device idle if populated */
 	if (oh->mux && oh->mux->pads_dynamic)
@@ -1374,24 +1632,34 @@ static int _shutdown(struct omap_hwmod *oh)
 		}
 	}
 
-	if (oh->class->sysc)
+	if (oh->class->sysc) {
+		if (oh->_state == _HWMOD_STATE_IDLE)
+			_enable(oh);
 		_shutdown_sysc(oh);
-
-	/*
-	 * If an IP contains only one HW reset line, then assert it
-	 * before disabling the clocks and shutting down the IP.
-	 */
-	if (oh->rst_lines_cnt == 1)
-		_assert_hardreset(oh, oh->rst_lines[0].name);
+	}
 
 	/* clocks and deps are already disabled in idle */
 	if (oh->_state == _HWMOD_STATE_ENABLED) {
 		_del_initiator_dep(oh, mpu_oh);
 		/* XXX what about the other system initiators here? dma, dsp */
+		_disable_module(oh);
+		ret = _wait_target_disable(oh);
+		if (ret)
+			pr_warn("omap_hwmod: %s: _wait_target_disable failed\n",
+				oh->name);
 		_disable_clocks(oh);
+		if (oh->clkdm)
+			clkdm_hwmod_disable(oh->clkdm, oh);
 	}
 	/* XXX Should this code also force-disable the optional clocks? */
 
+	/*
+	 * If an IP contains only one HW reset line, then assert it
+	 * after disabling the clocks and before shutting down the IP.
+	 */
+	if (oh->rst_lines_cnt == 1)
+		_assert_hardreset(oh, oh->rst_lines[0].name);
+
 	/* Mux pins to safe mode or use populated off mode values */
 	if (oh->mux)
 		omap_hwmod_mux(oh->mux, _HWMOD_STATE_DISABLED);
@@ -1561,6 +1829,33 @@ void omap_hwmod_write(u32 v, struct omap_hwmod *oh, u16 reg_offs)
 		__raw_writel(v, oh->_mpu_rt_va + reg_offs);
 }
 
+/**
+ * omap_hwmod_softreset - reset a module via SYSCONFIG.SOFTRESET bit
+ * @oh: struct omap_hwmod *
+ *
+ * This is a public function exposed to drivers. Some drivers may need to do
+ * some settings before and after resetting the device.  Those drivers after
+ * doing the necessary settings could use this function to start a reset by
+ * setting the SYSCONFIG.SOFTRESET bit.
+ */
+int omap_hwmod_softreset(struct omap_hwmod *oh)
+{
+	u32 v;
+	int ret;
+
+	if (!oh || !(oh->_sysc_cache))
+		return -EINVAL;
+
+	v = oh->_sysc_cache;
+	ret = _set_softreset(oh, &v);
+	if (ret)
+		goto error;
+	_write_sysconfig(v, oh);
+
+error:
+	return ret;
+}
+
 /**
  * omap_hwmod_set_slave_idlemode - set the hwmod's OCP slave idlemode
  * @oh: struct omap_hwmod *
@@ -1685,9 +1980,6 @@ static int __init _populate_mpu_rt_base(struct omap_hwmod *oh, void *data)
 		return 0;
 
 	oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index);
-	if (!oh->_mpu_rt_va)
-		pr_warning("omap_hwmod: %s found no _mpu_rt_va for %s\n",
-				__func__, oh->name);
 
 	return 0;
 }
@@ -1939,10 +2231,10 @@ int omap_hwmod_count_resources(struct omap_hwmod *oh)
 {
 	int ret, i;
 
-	ret = oh->mpu_irqs_cnt + oh->sdma_reqs_cnt;
+	ret = _count_mpu_irqs(oh) + _count_sdma_reqs(oh);
 
 	for (i = 0; i < oh->slaves_cnt; i++)
-		ret += oh->slaves[i]->addr_cnt;
+		ret += _count_ocp_if_addr_spaces(oh->slaves[i]);
 
 	return ret;
 }
@@ -1959,12 +2251,13 @@ int omap_hwmod_count_resources(struct omap_hwmod *oh)
  */
 int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
 {
-	int i, j;
+	int i, j, mpu_irqs_cnt, sdma_reqs_cnt;
 	int r = 0;
 
 	/* For each IRQ, DMA, memory area, fill in array.*/
 
-	for (i = 0; i < oh->mpu_irqs_cnt; i++) {
+	mpu_irqs_cnt = _count_mpu_irqs(oh);
+	for (i = 0; i < mpu_irqs_cnt; i++) {
 		(res + r)->name = (oh->mpu_irqs + i)->name;
 		(res + r)->start = (oh->mpu_irqs + i)->irq;
 		(res + r)->end = (oh->mpu_irqs + i)->irq;
@@ -1972,7 +2265,8 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
 		r++;
 	}
 
-	for (i = 0; i < oh->sdma_reqs_cnt; i++) {
+	sdma_reqs_cnt = _count_sdma_reqs(oh);
+	for (i = 0; i < sdma_reqs_cnt; i++) {
 		(res + r)->name = (oh->sdma_reqs + i)->name;
 		(res + r)->start = (oh->sdma_reqs + i)->dma_req;
 		(res + r)->end = (oh->sdma_reqs + i)->dma_req;
@@ -1982,10 +2276,12 @@ int omap_hwmod_fill_resources(struct omap_hwmod *oh, struct resource *res)
 
 	for (i = 0; i < oh->slaves_cnt; i++) {
 		struct omap_hwmod_ocp_if *os;
+		int addr_cnt;
 
 		os = oh->slaves[i];
+		addr_cnt = _count_ocp_if_addr_spaces(os);
 
-		for (j = 0; j < os->addr_cnt; j++) {
+		for (j = 0; j < addr_cnt; j++) {
 			(res + r)->name = (os->addr + j)->name;
 			(res + r)->start = (os->addr + j)->pa_start;
 			(res + r)->end = (os->addr + j)->pa_end;