Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp

Conflicts:
	litmus/sched_cedf.c

1 files changed, 153 insertions, 336 deletions

diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index 5d80cb897489..6cb6c03293df 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -13,7 +13,6 @@
  */
 #undef DEBUG
 
-#include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/list.h>
@@ -27,14 +26,8 @@
 
 #include <linux/bitops.h>
 
-#include "prm.h"
-#include "prm-regbits-24xx.h"
-#include "cm.h"
-
 #include <plat/clock.h>
-#include <plat/powerdomain.h>
-#include <plat/clockdomain.h>
-#include <plat/prcm.h>
+#include "clockdomain.h"
 
 /* clkdm_list contains all registered struct clockdomains */
 static LIST_HEAD(clkdm_list);
@@ -42,6 +35,7 @@ static LIST_HEAD(clkdm_list);
 /* array of clockdomain deps to be added/removed when clkdm in hwsup mode */
 static struct clkdm_autodep *autodeps;
 
+static struct clkdm_ops *arch_clkdm;
 
 /* Private functions */
 
@@ -141,6 +135,9 @@ static struct clkdm_dep *_clkdm_deps_lookup(struct clockdomain *clkdm,
  * clockdomain is in hardware-supervised mode.  Meant to be called
  * once at clockdomain layer initialization, since these should remain
  * fixed for a particular architecture.  No return value.
+ *
+ * XXX autodeps are deprecated and should be removed at the earliest
+ * opportunity
  */
 static void _autodep_lookup(struct clkdm_autodep *autodep)
 {
@@ -168,12 +165,15 @@ static void _autodep_lookup(struct clkdm_autodep *autodep)
  * Add the "autodep" sleep & wakeup dependencies to clockdomain 'clkdm'
  * in hardware-supervised mode.  Meant to be called from clock framework
  * when a clock inside clockdomain 'clkdm' is enabled.  No return value.
+ *
+ * XXX autodeps are deprecated and should be removed at the earliest
+ * opportunity
  */
-static void _clkdm_add_autodeps(struct clockdomain *clkdm)
+void _clkdm_add_autodeps(struct clockdomain *clkdm)
 {
         struct clkdm_autodep *autodep;
 
-        if (!autodeps)
+        if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
                 return;
 
         for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
@@ -199,12 +199,15 @@ static void _clkdm_add_autodeps(struct clockdomain *clkdm)
  * Remove the "autodep" sleep & wakeup dependencies from clockdomain 'clkdm'
  * in hardware-supervised mode.  Meant to be called from clock framework
  * when a clock inside clockdomain 'clkdm' is disabled.  No return value.
+ *
+ * XXX autodeps are deprecated and should be removed at the earliest
+ * opportunity
  */
-static void _clkdm_del_autodeps(struct clockdomain *clkdm)
+void _clkdm_del_autodeps(struct clockdomain *clkdm)
 {
         struct clkdm_autodep *autodep;
 
-        if (!autodeps)
+        if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
                 return;
 
         for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
@@ -223,138 +226,39 @@ static void _clkdm_del_autodeps(struct clockdomain *clkdm)
         }
 }
 
-/*
- * _omap2_clkdm_set_hwsup - set the hwsup idle transition bit
- * @clkdm: struct clockdomain *
- * @enable: int 0 to disable, 1 to enable
- *
- * Internal helper for actually switching the bit that controls hwsup
- * idle transitions for clkdm.
- */
-static void _omap2_clkdm_set_hwsup(struct clockdomain *clkdm, int enable)
-{
-        u32 bits, v;
-
-        if (cpu_is_omap24xx()) {
-                if (enable)
-                        bits = OMAP24XX_CLKSTCTRL_ENABLE_AUTO;
-                else
-                        bits = OMAP24XX_CLKSTCTRL_DISABLE_AUTO;
-        } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
-                if (enable)
-                        bits = OMAP34XX_CLKSTCTRL_ENABLE_AUTO;
-                else
-                        bits = OMAP34XX_CLKSTCTRL_DISABLE_AUTO;
-        } else {
-                BUG();
-        }
-
-        bits = bits << __ffs(clkdm->clktrctrl_mask);
-
-        v = __raw_readl(clkdm->clkstctrl_reg);
-        v &= ~(clkdm->clktrctrl_mask);
-        v |= bits;
-        __raw_writel(v, clkdm->clkstctrl_reg);
-
-}
-
 /**
- * _init_wkdep_usecount - initialize wkdep usecounts to match hardware
- * @clkdm: clockdomain to initialize wkdep usecounts
+ * _resolve_clkdm_deps() - resolve clkdm_names in @clkdm_deps to clkdms
+ * @clkdm: clockdomain that we are resolving dependencies for
+ * @clkdm_deps: ptr to array of struct clkdm_deps to resolve
  *
- * Initialize the wakeup dependency usecount variables for clockdomain @clkdm.
- * If a wakeup dependency is present in the hardware, the usecount will be
- * set to 1; otherwise, it will be set to 0.  Software should clear all
- * software wakeup dependencies prior to calling this function if it wishes
- * to ensure that all usecounts start at 0.  No return value.
+ * Iterates through @clkdm_deps, looking up the struct clockdomain named by
+ * clkdm_name and storing the clockdomain pointer in the struct clkdm_dep.
+ * No return value.
  */
-static void _init_wkdep_usecount(struct clockdomain *clkdm)
+static void _resolve_clkdm_deps(struct clockdomain *clkdm,
+                                struct clkdm_dep *clkdm_deps)
 {
-        u32 v;
         struct clkdm_dep *cd;
 
-        if (!clkdm->wkdep_srcs)
-                return;
-
-        for (cd = clkdm->wkdep_srcs; cd->clkdm_name; cd++) {
+        for (cd = clkdm_deps; cd && cd->clkdm_name; cd++) {
                 if (!omap_chip_is(cd->omap_chip))
                         continue;
-
-                if (!cd->clkdm && cd->clkdm_name)
-                        cd->clkdm = _clkdm_lookup(cd->clkdm_name);
-
-                if (!cd->clkdm) {
-                        WARN(!cd->clkdm, "clockdomain: %s: wkdep clkdm %s not "
-                             "found\n", clkdm->name, cd->clkdm_name);
+                if (cd->clkdm)
                         continue;
-                }
-
-                v = prm_read_mod_bits_shift(clkdm->pwrdm.ptr->prcm_offs,
-                                            PM_WKDEP,
-                                            (1 << cd->clkdm->dep_bit));
+                cd->clkdm = _clkdm_lookup(cd->clkdm_name);
 
-                if (v)
-                        pr_debug("clockdomain: %s: wakeup dependency already "
-                                 "set to wake up when %s wakes\n",
-                                 clkdm->name, cd->clkdm->name);
-
-                atomic_set(&cd->wkdep_usecount, (v) ? 1 : 0);
+                WARN(!cd->clkdm, "clockdomain: %s: could not find clkdm %s while resolving dependencies - should never happen",
+                     clkdm->name, cd->clkdm_name);
         }
 }
 
-/**
- * _init_sleepdep_usecount - initialize sleepdep usecounts to match hardware
- * @clkdm: clockdomain to initialize sleepdep usecounts
- *
- * Initialize the sleep dependency usecount variables for clockdomain @clkdm.
- * If a sleep dependency is present in the hardware, the usecount will be
- * set to 1; otherwise, it will be set to 0.  Software should clear all
- * software sleep dependencies prior to calling this function if it wishes
- * to ensure that all usecounts start at 0.  No return value.
- */
-static void _init_sleepdep_usecount(struct clockdomain *clkdm)
-{
-        u32 v;
-        struct clkdm_dep *cd;
-
-        if (!cpu_is_omap34xx())
-                return;
-
-        if (!clkdm->sleepdep_srcs)
-                return;
-
-        for (cd = clkdm->sleepdep_srcs; cd->clkdm_name; cd++) {
-                if (!omap_chip_is(cd->omap_chip))
-                        continue;
-
-                if (!cd->clkdm && cd->clkdm_name)
-                        cd->clkdm = _clkdm_lookup(cd->clkdm_name);
-
-                if (!cd->clkdm) {
-                        WARN(!cd->clkdm, "clockdomain: %s: sleepdep clkdm %s "
-                             "not found\n", clkdm->name, cd->clkdm_name);
-                        continue;
-                }
-
-                v = prm_read_mod_bits_shift(clkdm->pwrdm.ptr->prcm_offs,
-                                            OMAP3430_CM_SLEEPDEP,
-                                            (1 << cd->clkdm->dep_bit));
-
-                if (v)
-                        pr_debug("clockdomain: %s: sleep dependency already "
-                                 "set to prevent from idling until %s "
-                                 "idles\n", clkdm->name, cd->clkdm->name);
-
-                atomic_set(&cd->sleepdep_usecount, (v) ? 1 : 0);
-        }
-};
-
 /* Public functions */
 
 /**
  * clkdm_init - set up the clockdomain layer
  * @clkdms: optional pointer to an array of clockdomains to register
  * @init_autodeps: optional pointer to an array of autodeps to register
+ * @custom_funcs: func pointers for arch specific implementations
  *
  * Set up internal state.  If a pointer to an array of clockdomains
  * @clkdms was supplied, loop through the list of clockdomains,
@@ -363,12 +267,18 @@ static void _init_sleepdep_usecount(struct clockdomain *clkdm)
  * @init_autodeps was provided, register those.  No return value.
  */
 void clkdm_init(struct clockdomain **clkdms,
-                struct clkdm_autodep *init_autodeps)
+                struct clkdm_autodep *init_autodeps,
+                struct clkdm_ops *custom_funcs)
 {
         struct clockdomain **c = NULL;
         struct clockdomain *clkdm;
         struct clkdm_autodep *autodep = NULL;
 
+        if (!custom_funcs)
+                WARN(1, "No custom clkdm functions registered\n");
+        else
+                arch_clkdm = custom_funcs;
+
         if (clkdms)
                 for (c = clkdms; *c; c++)
                         _clkdm_register(*c);
@@ -379,12 +289,20 @@ void clkdm_init(struct clockdomain **clkdms,
                         _autodep_lookup(autodep);
 
         /*
-         * Ensure that the *dep_usecount registers reflect the current
-         * state of the PRCM.
+         * Put all clockdomains into software-supervised mode; PM code
+         * should later enable hardware-supervised mode as appropriate
          */
         list_for_each_entry(clkdm, &clkdm_list, node) {
-                _init_wkdep_usecount(clkdm);
-                _init_sleepdep_usecount(clkdm);
+                if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
+                        clkdm_wakeup(clkdm);
+                else if (clkdm->flags & CLKDM_CAN_DISABLE_AUTO)
+                        clkdm_deny_idle(clkdm);
+
+                _resolve_clkdm_deps(clkdm, clkdm->wkdep_srcs);
+                clkdm_clear_all_wkdeps(clkdm);
+
+                _resolve_clkdm_deps(clkdm, clkdm->sleepdep_srcs);
+                clkdm_clear_all_sleepdeps(clkdm);
         }
 }
 
@@ -480,26 +398,32 @@ struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm)
 int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 {
         struct clkdm_dep *cd;
+        int ret = 0;
 
         if (!clkdm1 || !clkdm2)
                 return -EINVAL;
 
         cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
-        if (IS_ERR(cd)) {
+        if (IS_ERR(cd))
+                ret = PTR_ERR(cd);
+
+        if (!arch_clkdm || !arch_clkdm->clkdm_add_wkdep)
+                ret = -EINVAL;
+
+        if (ret) {
                 pr_debug("clockdomain: hardware cannot set/clear wake up of "
                          "%s when %s wakes up\n", clkdm1->name, clkdm2->name);
-                return PTR_ERR(cd);
+                return ret;
         }
 
         if (atomic_inc_return(&cd->wkdep_usecount) == 1) {
                 pr_debug("clockdomain: hardware will wake up %s when %s wakes "
                          "up\n", clkdm1->name, clkdm2->name);
 
-                prm_set_mod_reg_bits((1 << clkdm2->dep_bit),
-                                     clkdm1->pwrdm.ptr->prcm_offs, PM_WKDEP);
+                ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
         }
 
-        return 0;
+        return ret;
 }
 
 /**
@@ -515,26 +439,32 @@ int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 {
         struct clkdm_dep *cd;
+        int ret = 0;
 
         if (!clkdm1 || !clkdm2)
                 return -EINVAL;
 
         cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
-        if (IS_ERR(cd)) {
+        if (IS_ERR(cd))
+                ret = PTR_ERR(cd);
+
+        if (!arch_clkdm || !arch_clkdm->clkdm_del_wkdep)
+                ret = -EINVAL;
+
+        if (ret) {
                 pr_debug("clockdomain: hardware cannot set/clear wake up of "
                          "%s when %s wakes up\n", clkdm1->name, clkdm2->name);
-                return PTR_ERR(cd);
+                return ret;
         }
 
         if (atomic_dec_return(&cd->wkdep_usecount) == 0) {
                 pr_debug("clockdomain: hardware will no longer wake up %s "
                          "after %s wakes up\n", clkdm1->name, clkdm2->name);
 
-                prm_clear_mod_reg_bits((1 << clkdm2->dep_bit),
-                                       clkdm1->pwrdm.ptr->prcm_offs, PM_WKDEP);
+                ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
         }
 
-        return 0;
+        return ret;
 }
 
 /**
@@ -554,20 +484,26 @@ int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 {
         struct clkdm_dep *cd;
+        int ret = 0;
 
         if (!clkdm1 || !clkdm2)
                 return -EINVAL;
 
         cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
-        if (IS_ERR(cd)) {
+        if (IS_ERR(cd))
+                ret = PTR_ERR(cd);
+
+        if (!arch_clkdm || !arch_clkdm->clkdm_read_wkdep)
+                ret = -EINVAL;
+
+        if (ret) {
                 pr_debug("clockdomain: hardware cannot set/clear wake up of "
                          "%s when %s wakes up\n", clkdm1->name, clkdm2->name);
-                return PTR_ERR(cd);
+                return ret;
         }
 
         /* XXX It's faster to return the atomic wkdep_usecount */
-        return prm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs, PM_WKDEP,
-                                       (1 << clkdm2->dep_bit));
+        return arch_clkdm->clkdm_read_wkdep(clkdm1, clkdm2);
 }
 
 /**
@@ -582,24 +518,13 @@ int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
  */
 int clkdm_clear_all_wkdeps(struct clockdomain *clkdm)
 {
-        struct clkdm_dep *cd;
-        u32 mask = 0;
-
         if (!clkdm)
                 return -EINVAL;
 
-        for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
-                if (!omap_chip_is(cd->omap_chip))
-                        continue;
-
-                /* PRM accesses are slow, so minimize them */
-                mask |= 1 << cd->clkdm->dep_bit;
-                atomic_set(&cd->wkdep_usecount, 0);
-        }
-
-        prm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs, PM_WKDEP);
+        if (!arch_clkdm || !arch_clkdm->clkdm_clear_all_wkdeps)
+                return -EINVAL;
 
-        return 0;
+        return arch_clkdm->clkdm_clear_all_wkdeps(clkdm);
 }
 
 /**
@@ -617,31 +542,33 @@ int clkdm_clear_all_wkdeps(struct clockdomain *clkdm)
 int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 {
         struct clkdm_dep *cd;
-
-        if (!cpu_is_omap34xx())
-                return -EINVAL;
+        int ret = 0;
 
         if (!clkdm1 || !clkdm2)
                 return -EINVAL;
 
         cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
-        if (IS_ERR(cd)) {
+        if (IS_ERR(cd))
+                ret = PTR_ERR(cd);
+
+        if (!arch_clkdm || !arch_clkdm->clkdm_add_sleepdep)
+                ret = -EINVAL;
+
+        if (ret) {
                 pr_debug("clockdomain: hardware cannot set/clear sleep "
                          "dependency affecting %s from %s\n", clkdm1->name,
                          clkdm2->name);
-                return PTR_ERR(cd);
+                return ret;
         }
 
         if (atomic_inc_return(&cd->sleepdep_usecount) == 1) {
                 pr_debug("clockdomain: will prevent %s from sleeping if %s "
                          "is active\n", clkdm1->name, clkdm2->name);
 
-                cm_set_mod_reg_bits((1 << clkdm2->dep_bit),
-                                    clkdm1->pwrdm.ptr->prcm_offs,
-                                    OMAP3430_CM_SLEEPDEP);
+                ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
         }
 
-        return 0;
+        return ret;
 }
 
 /**
@@ -659,19 +586,23 @@ int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 {
         struct clkdm_dep *cd;
-
-        if (!cpu_is_omap34xx())
-                return -EINVAL;
+        int ret = 0;
 
         if (!clkdm1 || !clkdm2)
                 return -EINVAL;
 
         cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
-        if (IS_ERR(cd)) {
+        if (IS_ERR(cd))
+                ret = PTR_ERR(cd);
+
+        if (!arch_clkdm || !arch_clkdm->clkdm_del_sleepdep)
+                ret = -EINVAL;
+
+        if (ret) {
                 pr_debug("clockdomain: hardware cannot set/clear sleep "
                          "dependency affecting %s from %s\n", clkdm1->name,
                          clkdm2->name);
-                return PTR_ERR(cd);
+                return ret;
         }
 
         if (atomic_dec_return(&cd->sleepdep_usecount) == 0) {
@@ -679,12 +610,10 @@ int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
                          "sleeping if %s is active\n", clkdm1->name,
                          clkdm2->name);
 
-                cm_clear_mod_reg_bits((1 << clkdm2->dep_bit),
-                                      clkdm1->pwrdm.ptr->prcm_offs,
-                                      OMAP3430_CM_SLEEPDEP);
+                ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
         }
 
-        return 0;
+        return ret;
 }
 
 /**
@@ -706,25 +635,27 @@ int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
 {
         struct clkdm_dep *cd;
-
-        if (!cpu_is_omap34xx())
-                return -EINVAL;
+        int ret = 0;
 
         if (!clkdm1 || !clkdm2)
                 return -EINVAL;
 
         cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
-        if (IS_ERR(cd)) {
+        if (IS_ERR(cd))
+                ret = PTR_ERR(cd);
+
+        if (!arch_clkdm || !arch_clkdm->clkdm_read_sleepdep)
+                ret = -EINVAL;
+
+        if (ret) {
                 pr_debug("clockdomain: hardware cannot set/clear sleep "
                          "dependency affecting %s from %s\n", clkdm1->name,
                          clkdm2->name);
-                return PTR_ERR(cd);
+                return ret;
         }
 
         /* XXX It's faster to return the atomic sleepdep_usecount */
-        return prm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs,
-                                       OMAP3430_CM_SLEEPDEP,
-                                       (1 << clkdm2->dep_bit));
+        return arch_clkdm->clkdm_read_sleepdep(clkdm1, clkdm2);
 }
 
 /**
@@ -739,54 +670,17 @@ int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
  */
 int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm)
 {
-        struct clkdm_dep *cd;
-        u32 mask = 0;
-
-        if (!cpu_is_omap34xx())
-                return -EINVAL;
-
         if (!clkdm)
                 return -EINVAL;
 
-        for (cd = clkdm->sleepdep_srcs; cd && cd->clkdm_name; cd++) {
-                if (!omap_chip_is(cd->omap_chip))
-                        continue;
-
-                /* PRM accesses are slow, so minimize them */
-                mask |= 1 << cd->clkdm->dep_bit;
-                atomic_set(&cd->sleepdep_usecount, 0);
-        }
-
-        prm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs,
-                               OMAP3430_CM_SLEEPDEP);
-
-        return 0;
-}
-
-/**
- * omap2_clkdm_clktrctrl_read - read the clkdm's current state transition mode
- * @clkdm: struct clkdm * of a clockdomain
- *
- * Return the clockdomain @clkdm current state transition mode from the
- * corresponding domain CM_CLKSTCTRL register.  Returns -EINVAL if @clkdm
- * is NULL or the current mode upon success.
- */
-static int omap2_clkdm_clktrctrl_read(struct clockdomain *clkdm)
-{
-        u32 v;
-
-        if (!clkdm)
+        if (!arch_clkdm || !arch_clkdm->clkdm_clear_all_sleepdeps)
                 return -EINVAL;
 
-        v = __raw_readl(clkdm->clkstctrl_reg);
-        v &= clkdm->clktrctrl_mask;
-        v >>= __ffs(clkdm->clktrctrl_mask);
-
-        return v;
+        return arch_clkdm->clkdm_clear_all_sleepdeps(clkdm);
 }
 
 /**
- * omap2_clkdm_sleep - force clockdomain sleep transition
+ * clkdm_sleep - force clockdomain sleep transition
  * @clkdm: struct clockdomain *
  *
  * Instruct the CM to force a sleep transition on the specified
@@ -794,7 +688,7 @@ static int omap2_clkdm_clktrctrl_read(struct clockdomain *clkdm)
  * clockdomain does not support software-initiated sleep; 0 upon
  * success.
  */
-int omap2_clkdm_sleep(struct clockdomain *clkdm)
+int clkdm_sleep(struct clockdomain *clkdm)
 {
         if (!clkdm)
                 return -EINVAL;
@@ -805,32 +699,16 @@ int omap2_clkdm_sleep(struct clockdomain *clkdm)
                 return -EINVAL;
         }
 
-        pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
-
-        if (cpu_is_omap24xx()) {
-
-                cm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
-                            clkdm->pwrdm.ptr->prcm_offs, OMAP2_PM_PWSTCTRL);
-
-        } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
-
-                u32 bits = (OMAP34XX_CLKSTCTRL_FORCE_SLEEP <<
-                         __ffs(clkdm->clktrctrl_mask));
-
-                u32 v = __raw_readl(clkdm->clkstctrl_reg);
-                v &= ~(clkdm->clktrctrl_mask);
-                v |= bits;
-                __raw_writel(v, clkdm->clkstctrl_reg);
+        if (!arch_clkdm || !arch_clkdm->clkdm_sleep)
+                return -EINVAL;
 
-        } else {
-                BUG();
-        };
+        pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
 
-        return 0;
+        return arch_clkdm->clkdm_sleep(clkdm);
 }
 
 /**
- * omap2_clkdm_wakeup - force clockdomain wakeup transition
+ * clkdm_wakeup - force clockdomain wakeup transition
  * @clkdm: struct clockdomain *
  *
  * Instruct the CM to force a wakeup transition on the specified
@@ -838,7 +716,7 @@ int omap2_clkdm_sleep(struct clockdomain *clkdm)
  * clockdomain does not support software-controlled wakeup; 0 upon
  * success.
  */
-int omap2_clkdm_wakeup(struct clockdomain *clkdm)
+int clkdm_wakeup(struct clockdomain *clkdm)
 {
         if (!clkdm)
                 return -EINVAL;
@@ -849,32 +727,16 @@ int omap2_clkdm_wakeup(struct clockdomain *clkdm)
                 return -EINVAL;
         }
 
-        pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
-
-        if (cpu_is_omap24xx()) {
-
-                cm_clear_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
-                              clkdm->pwrdm.ptr->prcm_offs, OMAP2_PM_PWSTCTRL);
-
-        } else if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
-
-                u32 bits = (OMAP34XX_CLKSTCTRL_FORCE_WAKEUP <<
-                         __ffs(clkdm->clktrctrl_mask));
-
-                u32 v = __raw_readl(clkdm->clkstctrl_reg);
-                v &= ~(clkdm->clktrctrl_mask);
-                v |= bits;
-                __raw_writel(v, clkdm->clkstctrl_reg);
+        if (!arch_clkdm || !arch_clkdm->clkdm_wakeup)
+                return -EINVAL;
 
-        } else {
-                BUG();
-        };
+        pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
 
-        return 0;
+        return arch_clkdm->clkdm_wakeup(clkdm);
 }
 
 /**
- * omap2_clkdm_allow_idle - enable hwsup idle transitions for clkdm
+ * clkdm_allow_idle - enable hwsup idle transitions for clkdm
  * @clkdm: struct clockdomain *
  *
  * Allow the hardware to automatically switch the clockdomain @clkdm into
@@ -883,7 +745,7 @@ int omap2_clkdm_wakeup(struct clockdomain *clkdm)
  * framework, wkdep/sleepdep autodependencies are added; this is so
  * device drivers can read and write to the device.  No return value.
  */
-void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
+void clkdm_allow_idle(struct clockdomain *clkdm)
 {
         if (!clkdm)
                 return;
@@ -894,28 +756,18 @@ void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
                 return;
         }
 
+        if (!arch_clkdm || !arch_clkdm->clkdm_allow_idle)
+                return;
+
         pr_debug("clockdomain: enabling automatic idle transitions for %s\n",
                  clkdm->name);
 
-        /*
-         * XXX This should be removed once TI adds wakeup/sleep
-         * dependency code and data for OMAP4.
-         */
-        if (cpu_is_omap44xx()) {
-                WARN_ONCE(1, "clockdomain: OMAP4 wakeup/sleep dependency "
-                          "support is not yet implemented\n");
-        } else {
-                if (atomic_read(&clkdm->usecount) > 0)
-                        _clkdm_add_autodeps(clkdm);
-        }
-
-        _omap2_clkdm_set_hwsup(clkdm, 1);
-
+        arch_clkdm->clkdm_allow_idle(clkdm);
         pwrdm_clkdm_state_switch(clkdm);
 }
 
 /**
- * omap2_clkdm_deny_idle - disable hwsup idle transitions for clkdm
+ * clkdm_deny_idle - disable hwsup idle transitions for clkdm
  * @clkdm: struct clockdomain *
  *
  * Prevent the hardware from automatically switching the clockdomain
@@ -923,7 +775,7 @@ void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
  * downstream clocks enabled in the clock framework, wkdep/sleepdep
  * autodependencies are removed.  No return value.
  */
-void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
+void clkdm_deny_idle(struct clockdomain *clkdm)
 {
         if (!clkdm)
                 return;
@@ -934,29 +786,20 @@ void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
                 return;
         }
 
+        if (!arch_clkdm || !arch_clkdm->clkdm_deny_idle)
+                return;
+
         pr_debug("clockdomain: disabling automatic idle transitions for %s\n",
                  clkdm->name);
 
-        _omap2_clkdm_set_hwsup(clkdm, 0);
-
-        /*
-         * XXX This should be removed once TI adds wakeup/sleep
-         * dependency code and data for OMAP4.
-         */
-        if (cpu_is_omap44xx()) {
-                WARN_ONCE(1, "clockdomain: OMAP4 wakeup/sleep dependency "
-                          "support is not yet implemented\n");
-        } else {
-                if (atomic_read(&clkdm->usecount) > 0)
-                        _clkdm_del_autodeps(clkdm);
-        }
+        arch_clkdm->clkdm_deny_idle(clkdm);
 }
 
 
 /* Clockdomain-to-clock framework interface code */
 
 /**
- * omap2_clkdm_clk_enable - add an enabled downstream clock to this clkdm
+ * clkdm_clk_enable - add an enabled downstream clock to this clkdm
  * @clkdm: struct clockdomain *
  * @clk: struct clk * of the enabled downstream clock
  *
@@ -969,10 +812,8 @@ void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
  * by on-chip processors.  Returns -EINVAL if passed null pointers;
  * returns 0 upon success or if the clockdomain is in hwsup idle mode.
  */
-int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
+int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
 {
-        int v;
-
         /*
          * XXX Rewrite this code to maintain a list of enabled
          * downstream clocks for debugging purposes?
@@ -981,6 +822,9 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
         if (!clkdm || !clk)
                 return -EINVAL;
 
+        if (!arch_clkdm || !arch_clkdm->clkdm_clk_enable)
+                return -EINVAL;
+
         if (atomic_inc_return(&clkdm->usecount) > 1)
                 return 0;
 
@@ -989,21 +833,7 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
         pr_debug("clockdomain: clkdm %s: clk %s now enabled\n", clkdm->name,
                  clk->name);
 
-        if (!clkdm->clkstctrl_reg)
-                return 0;
-
-        v = omap2_clkdm_clktrctrl_read(clkdm);
-
-        if ((cpu_is_omap34xx() && v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ||
-            (cpu_is_omap24xx() && v == OMAP24XX_CLKSTCTRL_ENABLE_AUTO)) {
-                /* Disable HW transitions when we are changing deps */
-                _omap2_clkdm_set_hwsup(clkdm, 0);
-                _clkdm_add_autodeps(clkdm);
-                _omap2_clkdm_set_hwsup(clkdm, 1);
-        } else {
-                omap2_clkdm_wakeup(clkdm);
-        }
-
+        arch_clkdm->clkdm_clk_enable(clkdm);
         pwrdm_wait_transition(clkdm->pwrdm.ptr);
         pwrdm_clkdm_state_switch(clkdm);
 
@@ -1011,7 +841,7 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
 }
 
 /**
- * omap2_clkdm_clk_disable - remove an enabled downstream clock from this clkdm
+ * clkdm_clk_disable - remove an enabled downstream clock from this clkdm
  * @clkdm: struct clockdomain *
  * @clk: struct clk * of the disabled downstream clock
  *
@@ -1024,10 +854,8 @@ int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
  * is enabled; or returns 0 upon success or if the clockdomain is in
  * hwsup idle mode.
  */
-int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
+int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
 {
-        int v;
-
         /*
          * XXX Rewrite this code to maintain a list of enabled
          * downstream clocks for debugging purposes?
@@ -1036,6 +864,9 @@ int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
         if (!clkdm || !clk)
                 return -EINVAL;
 
+        if (!arch_clkdm || !arch_clkdm->clkdm_clk_disable)
+                return -EINVAL;
+
 #ifdef DEBUG
         if (atomic_read(&clkdm->usecount) == 0) {
                 WARN_ON(1); /* underflow */
@@ -1051,21 +882,7 @@ int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
         pr_debug("clockdomain: clkdm %s: clk %s now disabled\n", clkdm->name,
                  clk->name);
 
-        if (!clkdm->clkstctrl_reg)
-                return 0;
-
-        v = omap2_clkdm_clktrctrl_read(clkdm);
-
-        if ((cpu_is_omap34xx() && v == OMAP34XX_CLKSTCTRL_ENABLE_AUTO) ||
-            (cpu_is_omap24xx() && v == OMAP24XX_CLKSTCTRL_ENABLE_AUTO)) {
-                /* Disable HW transitions when we are changing deps */
-                _omap2_clkdm_set_hwsup(clkdm, 0);
-                _clkdm_del_autodeps(clkdm);
-                _omap2_clkdm_set_hwsup(clkdm, 1);
-        } else {
-                omap2_clkdm_sleep(clkdm);
-        }
-
+        arch_clkdm->clkdm_clk_disable(clkdm);
         pwrdm_clkdm_state_switch(clkdm);
 
         return 0;