pwrdm_add_clkdm(pwrdm, clkdm);
- spin_lock_init(&clkdm->lock);
-
pr_debug("clockdomain: registered %s\n", clkdm->name);
return 0;
return cd;
}
-/*
+/**
* _autodep_lookup - resolve autodep clkdm names to clkdm pointers; store
* @autodep: struct clkdm_autodep * to resolve
*
autodep->clkdm.ptr = clkdm;
}
-/*
- * _clkdm_add_autodeps - add auto sleepdeps/wkdeps to clkdm upon clock enable
- * @clkdm: struct clockdomain *
+/**
+ * _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
*
- * 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.
+ * 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 _resolve_clkdm_deps(struct clockdomain *clkdm,
+ struct clkdm_dep *clkdm_deps)
+{
+ struct clkdm_dep *cd;
+
+ for (cd = clkdm_deps; cd && cd->clkdm_name; cd++) {
+ if (cd->clkdm)
+ continue;
+ cd->clkdm = _clkdm_lookup(cd->clkdm_name);
+
+ WARN(!cd->clkdm, "clockdomain: %s: could not find clkdm %s while resolving dependencies - should never happen",
+ clkdm->name, cd->clkdm_name);
+ }
+}
+
+/**
+ * _clkdm_add_wkdep - add a wakeup dependency from clkdm2 to clkdm1 (lockless)
+ * @clkdm1: wake this struct clockdomain * up (dependent)
+ * @clkdm2: when this struct clockdomain * wakes up (source)
*
- * XXX autodeps are deprecated and should be removed at the earliest
- * opportunity
+ * When the clockdomain represented by @clkdm2 wakes up, wake up
+ * @clkdm1. Implemented in hardware on the OMAP, this feature is
+ * designed to reduce wakeup latency of the dependent clockdomain @clkdm1.
+ * Returns -EINVAL if presented with invalid clockdomain pointers,
+ * -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or 0 upon
+ * success.
*/
-void _clkdm_add_autodeps(struct clockdomain *clkdm)
+static int _clkdm_add_wkdep(struct clockdomain *clkdm1,
+ struct clockdomain *clkdm2)
{
- struct clkdm_autodep *autodep;
+ struct clkdm_dep *cd;
+ int ret = 0;
- if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
- return;
+ if (!clkdm1 || !clkdm2)
+ return -EINVAL;
- for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
- if (IS_ERR(autodep->clkdm.ptr))
- continue;
+ cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
- pr_debug("clockdomain: %s: adding %s sleepdep/wkdep\n",
- clkdm->name, autodep->clkdm.ptr->name);
+ 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 ret;
+ }
+
+ cd->wkdep_usecount++;
+ if (cd->wkdep_usecount == 1) {
+ pr_debug("clockdomain: hardware will wake up %s when %s wakes up\n",
+ clkdm1->name, clkdm2->name);
- clkdm_add_sleepdep(clkdm, autodep->clkdm.ptr);
- clkdm_add_wkdep(clkdm, autodep->clkdm.ptr);
+ ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
}
+
+ return ret;
}
-/*
- * _clkdm_add_autodeps - remove auto sleepdeps/wkdeps from clkdm
- * @clkdm: struct clockdomain *
+/**
+ * _clkdm_del_wkdep - remove a wakeup dep from clkdm2 to clkdm1 (lockless)
+ * @clkdm1: wake this struct clockdomain * up (dependent)
+ * @clkdm2: when this struct clockdomain * wakes up (source)
*
- * 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.
+ * Remove a wakeup dependency causing @clkdm1 to wake up when @clkdm2
+ * wakes up. Returns -EINVAL if presented with invalid clockdomain
+ * pointers, -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or
+ * 0 upon success.
+ */
+static 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))
+ 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 ret;
+ }
+
+ cd->wkdep_usecount--;
+ if (cd->wkdep_usecount == 0) {
+ pr_debug("clockdomain: hardware will no longer wake up %s after %s wakes up\n",
+ clkdm1->name, clkdm2->name);
+
+ ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
+ }
+
+ return ret;
+}
+
+/**
+ * _clkdm_add_sleepdep - add a sleep dependency from clkdm2 to clkdm1 (lockless)
+ * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
+ * @clkdm2: when this struct clockdomain * is active (source)
*
- * XXX autodeps are deprecated and should be removed at the earliest
- * opportunity
+ * Prevent @clkdm1 from automatically going inactive (and then to
+ * retention or off) if @clkdm2 is active. Returns -EINVAL if
+ * presented with invalid clockdomain pointers or called on a machine
+ * that does not support software-configurable hardware sleep
+ * dependencies, -ENOENT if the specified dependency cannot be set in
+ * hardware, or 0 upon success.
*/
-void _clkdm_del_autodeps(struct clockdomain *clkdm)
+static int _clkdm_add_sleepdep(struct clockdomain *clkdm1,
+ struct clockdomain *clkdm2)
{
- struct clkdm_autodep *autodep;
+ struct clkdm_dep *cd;
+ int ret = 0;
- if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
- return;
+ if (!clkdm1 || !clkdm2)
+ return -EINVAL;
- for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
- if (IS_ERR(autodep->clkdm.ptr))
- continue;
+ cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
- pr_debug("clockdomain: %s: removing %s sleepdep/wkdep\n",
- clkdm->name, autodep->clkdm.ptr->name);
+ if (!arch_clkdm || !arch_clkdm->clkdm_add_sleepdep)
+ ret = -EINVAL;
- clkdm_del_sleepdep(clkdm, autodep->clkdm.ptr);
- clkdm_del_wkdep(clkdm, autodep->clkdm.ptr);
+ if (ret) {
+ pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
+ clkdm1->name, clkdm2->name);
+ return ret;
+ }
+
+ cd->sleepdep_usecount++;
+ if (cd->sleepdep_usecount == 1) {
+ pr_debug("clockdomain: will prevent %s from sleeping if %s is active\n",
+ clkdm1->name, clkdm2->name);
+
+ ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
}
+
+ return ret;
}
/**
- * _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
+ * _clkdm_del_sleepdep - remove a sleep dep from clkdm2 to clkdm1 (lockless)
+ * @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
+ * @clkdm2: when this struct clockdomain * is active (source)
*
- * 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.
+ * Allow @clkdm1 to automatically go inactive (and then to retention or
+ * off), independent of the activity state of @clkdm2. Returns -EINVAL
+ * if presented with invalid clockdomain pointers or called on a machine
+ * that does not support software-configurable hardware sleep dependencies,
+ * -ENOENT if the specified dependency cannot be cleared in hardware, or
+ * 0 upon success.
*/
-static void _resolve_clkdm_deps(struct clockdomain *clkdm,
- struct clkdm_dep *clkdm_deps)
+static int _clkdm_del_sleepdep(struct clockdomain *clkdm1,
+ struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
+ int ret = 0;
- for (cd = clkdm_deps; cd && cd->clkdm_name; cd++) {
- if (cd->clkdm)
- continue;
- cd->clkdm = _clkdm_lookup(cd->clkdm_name);
+ if (!clkdm1 || !clkdm2)
+ return -EINVAL;
- WARN(!cd->clkdm, "clockdomain: %s: could not find clkdm %s while resolving dependencies - should never happen",
- clkdm->name, cd->clkdm_name);
+ cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
+ 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 ret;
}
+
+ cd->sleepdep_usecount--;
+ if (cd->sleepdep_usecount == 0) {
+ pr_debug("clockdomain: will no longer prevent %s from sleeping if %s is active\n",
+ clkdm1->name, clkdm2->name);
+
+ ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
+ }
+
+ return ret;
}
/* Public functions */
int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
- int ret = 0;
+ int ret;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
if (IS_ERR(cd))
- ret = PTR_ERR(cd);
+ return 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 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);
-
- ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
- }
+ pwrdm_lock(cd->clkdm->pwrdm.ptr);
+ ret = _clkdm_add_wkdep(clkdm1, clkdm2);
+ pwrdm_unlock(cd->clkdm->pwrdm.ptr);
return ret;
}
int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
- int ret = 0;
+ int ret;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
if (IS_ERR(cd))
- ret = PTR_ERR(cd);
+ return 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 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);
-
- ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
- }
+ pwrdm_lock(cd->clkdm->pwrdm.ptr);
+ ret = _clkdm_del_wkdep(clkdm1, clkdm2);
+ pwrdm_unlock(cd->clkdm->pwrdm.ptr);
return ret;
}
return ret;
}
- /* XXX It's faster to return the atomic wkdep_usecount */
+ /* XXX It's faster to return the wkdep_usecount */
return arch_clkdm->clkdm_read_wkdep(clkdm1, clkdm2);
}
int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
- int ret = 0;
+ int ret;
if (!clkdm1 || !clkdm2)
return -EINVAL;
- cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
+ cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
if (IS_ERR(cd))
- ret = PTR_ERR(cd);
+ return 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 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);
-
- ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
- }
+ pwrdm_lock(cd->clkdm->pwrdm.ptr);
+ ret = _clkdm_add_sleepdep(clkdm1, clkdm2);
+ pwrdm_unlock(cd->clkdm->pwrdm.ptr);
return ret;
}
int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
- int ret = 0;
+ int ret;
if (!clkdm1 || !clkdm2)
return -EINVAL;
- cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
+ cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
if (IS_ERR(cd))
- ret = PTR_ERR(cd);
+ return 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 ret;
- }
-
- if (atomic_dec_return(&cd->sleepdep_usecount) == 0) {
- pr_debug("clockdomain: will no longer prevent %s from sleeping if %s is active\n",
- clkdm1->name, clkdm2->name);
-
- ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
- }
+ pwrdm_lock(cd->clkdm->pwrdm.ptr);
+ ret = _clkdm_del_sleepdep(clkdm1, clkdm2);
+ pwrdm_unlock(cd->clkdm->pwrdm.ptr);
return ret;
}
return ret;
}
- /* XXX It's faster to return the atomic sleepdep_usecount */
+ /* XXX It's faster to return the sleepdep_usecount */
return arch_clkdm->clkdm_read_sleepdep(clkdm1, clkdm2);
}
}
/**
- * clkdm_sleep - force clockdomain sleep transition
+ * clkdm_sleep_nolock - force clockdomain sleep transition (lockless)
* @clkdm: struct clockdomain *
*
* Instruct the CM to force a sleep transition on the specified
- * clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if
- * clockdomain does not support software-initiated sleep; 0 upon
- * success.
+ * clockdomain @clkdm. Only for use by the powerdomain code. Returns
+ * -EINVAL if @clkdm is NULL or if clockdomain does not support
+ * software-initiated sleep; 0 upon success.
*/
-int clkdm_sleep(struct clockdomain *clkdm)
+int clkdm_sleep_nolock(struct clockdomain *clkdm)
{
int ret;
- unsigned long flags;
if (!clkdm)
return -EINVAL;
pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
- spin_lock_irqsave(&clkdm->lock, flags);
clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
ret = arch_clkdm->clkdm_sleep(clkdm);
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ ret |= pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
+
return ret;
}
/**
- * clkdm_wakeup - force clockdomain wakeup transition
+ * clkdm_sleep - force clockdomain sleep transition
* @clkdm: struct clockdomain *
*
- * Instruct the CM to force a wakeup transition on the specified
- * clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if the
- * clockdomain does not support software-controlled wakeup; 0 upon
+ * Instruct the CM to force a sleep transition on the specified
+ * clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if
+ * clockdomain does not support software-initiated sleep; 0 upon
* success.
*/
-int clkdm_wakeup(struct clockdomain *clkdm)
+int clkdm_sleep(struct clockdomain *clkdm)
+{
+ int ret;
+
+ pwrdm_lock(clkdm->pwrdm.ptr);
+ ret = clkdm_sleep_nolock(clkdm);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
+
+ return ret;
+}
+
+/**
+ * clkdm_wakeup_nolock - force clockdomain wakeup transition (lockless)
+ * @clkdm: struct clockdomain *
+ *
+ * Instruct the CM to force a wakeup transition on the specified
+ * clockdomain @clkdm. Only for use by the powerdomain code. Returns
+ * -EINVAL if @clkdm is NULL or if the clockdomain does not support
+ * software-controlled wakeup; 0 upon success.
+ */
+int clkdm_wakeup_nolock(struct clockdomain *clkdm)
{
int ret;
- unsigned long flags;
if (!clkdm)
return -EINVAL;
pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
- spin_lock_irqsave(&clkdm->lock, flags);
clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
ret = arch_clkdm->clkdm_wakeup(clkdm);
- ret |= pwrdm_state_switch(clkdm->pwrdm.ptr);
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ ret |= pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
+
return ret;
}
/**
- * clkdm_allow_idle - enable hwsup idle transitions for clkdm
+ * clkdm_wakeup - force clockdomain wakeup transition
* @clkdm: struct clockdomain *
*
- * Allow the hardware to automatically switch the clockdomain @clkdm into
- * active or idle states, as needed by downstream clocks. If the
+ * Instruct the CM to force a wakeup transition on the specified
+ * clockdomain @clkdm. Returns -EINVAL if @clkdm is NULL or if the
+ * clockdomain does not support software-controlled wakeup; 0 upon
+ * success.
+ */
+int clkdm_wakeup(struct clockdomain *clkdm)
+{
+ int ret;
+
+ pwrdm_lock(clkdm->pwrdm.ptr);
+ ret = clkdm_wakeup_nolock(clkdm);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
+
+ return ret;
+}
+
+/**
+ * clkdm_allow_idle_nolock - enable hwsup idle transitions for clkdm
+ * @clkdm: struct clockdomain *
+ *
+ * Allow the hardware to automatically switch the clockdomain @clkdm
+ * into active or idle states, as needed by downstream clocks. If the
* clockdomain has any downstream clocks enabled in the clock
* framework, wkdep/sleepdep autodependencies are added; this is so
- * device drivers can read and write to the device. No return value.
+ * device drivers can read and write to the device. Only for use by
+ * the powerdomain code. No return value.
*/
-void clkdm_allow_idle(struct clockdomain *clkdm)
+void clkdm_allow_idle_nolock(struct clockdomain *clkdm)
{
- unsigned long flags;
-
if (!clkdm)
return;
pr_debug("clockdomain: enabling automatic idle transitions for %s\n",
clkdm->name);
- spin_lock_irqsave(&clkdm->lock, flags);
clkdm->_flags |= _CLKDM_FLAG_HWSUP_ENABLED;
arch_clkdm->clkdm_allow_idle(clkdm);
- pwrdm_state_switch(clkdm->pwrdm.ptr);
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
+}
+
+/**
+ * clkdm_allow_idle - enable hwsup idle transitions for clkdm
+ * @clkdm: struct clockdomain *
+ *
+ * Allow the hardware to automatically switch the clockdomain @clkdm into
+ * active or idle states, as needed by downstream clocks. If the
+ * clockdomain has any downstream clocks enabled in the clock
+ * framework, wkdep/sleepdep autodependencies are added; this is so
+ * device drivers can read and write to the device. No return value.
+ */
+void clkdm_allow_idle(struct clockdomain *clkdm)
+{
+ pwrdm_lock(clkdm->pwrdm.ptr);
+ clkdm_allow_idle_nolock(clkdm);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
}
/**
* Prevent the hardware from automatically switching the clockdomain
* @clkdm into inactive or idle states. If the clockdomain has
* downstream clocks enabled in the clock framework, wkdep/sleepdep
- * autodependencies are removed. No return value.
+ * autodependencies are removed. Only for use by the powerdomain
+ * code. No return value.
*/
-void clkdm_deny_idle(struct clockdomain *clkdm)
+void clkdm_deny_idle_nolock(struct clockdomain *clkdm)
{
- unsigned long flags;
-
if (!clkdm)
return;
pr_debug("clockdomain: disabling automatic idle transitions for %s\n",
clkdm->name);
- spin_lock_irqsave(&clkdm->lock, flags);
clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
arch_clkdm->clkdm_deny_idle(clkdm);
- pwrdm_state_switch(clkdm->pwrdm.ptr);
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
+}
+
+/**
+ * clkdm_deny_idle - disable hwsup idle transitions for clkdm
+ * @clkdm: struct clockdomain *
+ *
+ * Prevent the hardware from automatically switching the clockdomain
+ * @clkdm into inactive or idle states. If the clockdomain has
+ * downstream clocks enabled in the clock framework, wkdep/sleepdep
+ * autodependencies are removed. No return value.
+ */
+void clkdm_deny_idle(struct clockdomain *clkdm)
+{
+ pwrdm_lock(clkdm->pwrdm.ptr);
+ clkdm_deny_idle_nolock(clkdm);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
}
/**
bool clkdm_in_hwsup(struct clockdomain *clkdm)
{
bool ret;
- unsigned long flags;
if (!clkdm)
return false;
- spin_lock_irqsave(&clkdm->lock, flags);
ret = (clkdm->_flags & _CLKDM_FLAG_HWSUP_ENABLED) ? true : false;
- spin_unlock_irqrestore(&clkdm->lock, flags);
return ret;
}
return (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) ? true : false;
}
+/* Public autodep handling functions (deprecated) */
+
+/**
+ * clkdm_add_autodeps - add auto sleepdeps/wkdeps to clkdm upon clock enable
+ * @clkdm: struct clockdomain *
+ *
+ * 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
+ */
+void clkdm_add_autodeps(struct clockdomain *clkdm)
+{
+ struct clkdm_autodep *autodep;
+
+ if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
+ return;
+
+ for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
+ if (IS_ERR(autodep->clkdm.ptr))
+ continue;
+
+ pr_debug("clockdomain: %s: adding %s sleepdep/wkdep\n",
+ clkdm->name, autodep->clkdm.ptr->name);
+
+ _clkdm_add_sleepdep(clkdm, autodep->clkdm.ptr);
+ _clkdm_add_wkdep(clkdm, autodep->clkdm.ptr);
+ }
+}
+
+/**
+ * clkdm_del_autodeps - remove auto sleepdeps/wkdeps from clkdm
+ * @clkdm: struct clockdomain *
+ *
+ * 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
+ */
+void clkdm_del_autodeps(struct clockdomain *clkdm)
+{
+ struct clkdm_autodep *autodep;
+
+ if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
+ return;
+
+ for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
+ if (IS_ERR(autodep->clkdm.ptr))
+ continue;
+
+ pr_debug("clockdomain: %s: removing %s sleepdep/wkdep\n",
+ clkdm->name, autodep->clkdm.ptr->name);
+
+ _clkdm_del_sleepdep(clkdm, autodep->clkdm.ptr);
+ _clkdm_del_wkdep(clkdm, autodep->clkdm.ptr);
+ }
+}
+
/* Clockdomain-to-clock/hwmod framework interface code */
static int _clkdm_clk_hwmod_enable(struct clockdomain *clkdm)
{
- unsigned long flags;
-
if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_enable)
return -EINVAL;
- spin_lock_irqsave(&clkdm->lock, flags);
+ pwrdm_lock(clkdm->pwrdm.ptr);
/*
* For arch's with no autodeps, clkcm_clk_enable
* should be called for every clock instance or hwmod that is
* enabled, so the clkdm can be force woken up.
*/
- if ((atomic_inc_return(&clkdm->usecount) > 1) && autodeps) {
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ clkdm->usecount++;
+ if (clkdm->usecount > 1 && autodeps) {
+ pwrdm_unlock(clkdm->pwrdm.ptr);
return 0;
}
arch_clkdm->clkdm_clk_enable(clkdm);
- pwrdm_state_switch(clkdm->pwrdm.ptr);
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
pr_debug("clockdomain: %s: enabled\n", clkdm->name);
*/
int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
{
- unsigned long flags;
-
if (!clkdm || !clk || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
return -EINVAL;
- spin_lock_irqsave(&clkdm->lock, flags);
+ pwrdm_lock(clkdm->pwrdm.ptr);
/* corner case: disabling unused clocks */
- if ((__clk_get_enable_count(clk) == 0) &&
- (atomic_read(&clkdm->usecount) == 0))
+ if ((__clk_get_enable_count(clk) == 0) && clkdm->usecount == 0)
goto ccd_exit;
- if (atomic_read(&clkdm->usecount) == 0) {
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ if (clkdm->usecount == 0) {
+ pwrdm_unlock(clkdm->pwrdm.ptr);
WARN_ON(1); /* underflow */
return -ERANGE;
}
- if (atomic_dec_return(&clkdm->usecount) > 0) {
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ clkdm->usecount--;
+ if (clkdm->usecount > 0) {
+ pwrdm_unlock(clkdm->pwrdm.ptr);
return 0;
}
arch_clkdm->clkdm_clk_disable(clkdm);
- pwrdm_state_switch(clkdm->pwrdm.ptr);
+ pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
pr_debug("clockdomain: %s: disabled\n", clkdm->name);
ccd_exit:
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
return 0;
}
*/
int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh)
{
- unsigned long flags;
-
/* The clkdm attribute does not exist yet prior OMAP4 */
if (cpu_is_omap24xx() || cpu_is_omap34xx())
return 0;
if (!clkdm || !oh || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
return -EINVAL;
- spin_lock_irqsave(&clkdm->lock, flags);
+ pwrdm_lock(clkdm->pwrdm.ptr);
- if (atomic_read(&clkdm->usecount) == 0) {
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ if (clkdm->usecount == 0) {
+ pwrdm_unlock(clkdm->pwrdm.ptr);
WARN_ON(1); /* underflow */
return -ERANGE;
}
- if (atomic_dec_return(&clkdm->usecount) > 0) {
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ clkdm->usecount--;
+ if (clkdm->usecount > 0) {
+ pwrdm_unlock(clkdm->pwrdm.ptr);
return 0;
}
arch_clkdm->clkdm_clk_disable(clkdm);
- pwrdm_state_switch(clkdm->pwrdm.ptr);
- spin_unlock_irqrestore(&clkdm->lock, flags);
+ pwrdm_state_switch_nolock(clkdm->pwrdm.ptr);
+ pwrdm_unlock(clkdm->pwrdm.ptr);
pr_debug("clockdomain: %s: disabled\n", clkdm->name);
projects / deliverable / linux.git / blobdiff