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-rw-r--r--arch/arm/mach-omap2/clockdomain.c4
-rw-r--r--arch/arm/mach-omap2/powerdomain.c136
-rw-r--r--arch/arm/plat-omap/include/mach/powerdomain.h16
3 files changed, 156 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c
index f867d8f1d0e..b6ff5aa4726 100644
--- a/arch/arm/mach-omap2/clockdomain.c
+++ b/arch/arm/mach-omap2/clockdomain.c
@@ -219,6 +219,8 @@ int clkdm_register(struct clockdomain *clkdm)
list_add(&clkdm->node, &clkdm_list);
+ pwrdm_add_clkdm(pwrdm, clkdm);
+
pr_debug("clockdomain: registered %s\n", clkdm->name);
ret = 0;
@@ -240,6 +242,8 @@ int clkdm_unregister(struct clockdomain *clkdm)
if (!clkdm)
return -EINVAL;
+ pwrdm_del_clkdm(clkdm->pwrdm, clkdm);
+
mutex_lock(&clkdm_mutex);
list_del(&clkdm->node);
mutex_unlock(&clkdm_mutex);
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c
index 1ec003832ef..9a803492b28 100644
--- a/arch/arm/mach-omap2/powerdomain.c
+++ b/arch/arm/mach-omap2/powerdomain.c
@@ -33,6 +33,7 @@
#include <mach/cpu.h>
#include <mach/powerdomain.h>
+#include <mach/clockdomain.h>
/* pwrdm_list contains all registered struct powerdomains */
static LIST_HEAD(pwrdm_list);
@@ -237,6 +238,141 @@ int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm))
}
/**
+ * pwrdm_add_clkdm - add a clockdomain to a powerdomain
+ * @pwrdm: struct powerdomain * to add the clockdomain to
+ * @clkdm: struct clockdomain * to associate with a powerdomain
+ *
+ * Associate the clockdomain 'clkdm' with a powerdomain 'pwrdm'. This
+ * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if
+ * presented with invalid pointers; -ENOMEM if memory could not be allocated;
+ * or 0 upon success.
+ */
+int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
+{
+ unsigned long flags;
+ int i;
+ int ret = -EINVAL;
+
+ if (!pwrdm || !clkdm)
+ return -EINVAL;
+
+ pr_debug("powerdomain: associating clockdomain %s with powerdomain "
+ "%s\n", clkdm->name, pwrdm->name);
+
+ write_lock_irqsave(&pwrdm_rwlock, flags);
+
+ for (i = 0; i < PWRDM_MAX_CLKDMS; i++) {
+ if (!pwrdm->pwrdm_clkdms[i])
+ break;
+#ifdef DEBUG
+ if (pwrdm->pwrdm_clkdms[i] == clkdm) {
+ ret = -EINVAL;
+ goto pac_exit;
+ }
+#endif
+ }
+
+ if (i == PWRDM_MAX_CLKDMS) {
+ pr_debug("powerdomain: increase PWRDM_MAX_CLKDMS for "
+ "pwrdm %s clkdm %s\n", pwrdm->name, clkdm->name);
+ WARN_ON(1);
+ ret = -ENOMEM;
+ goto pac_exit;
+ }
+
+ pwrdm->pwrdm_clkdms[i] = clkdm;
+
+ ret = 0;
+
+pac_exit:
+ write_unlock_irqrestore(&pwrdm_rwlock, flags);
+
+ return ret;
+}
+
+/**
+ * pwrdm_del_clkdm - remove a clockdomain from a powerdomain
+ * @pwrdm: struct powerdomain * to add the clockdomain to
+ * @clkdm: struct clockdomain * to associate with a powerdomain
+ *
+ * Dissociate the clockdomain 'clkdm' from the powerdomain
+ * 'pwrdm'. Returns -EINVAL if presented with invalid pointers;
+ * -ENOENT if the clkdm was not associated with the powerdomain, or 0
+ * upon success.
+ */
+int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
+{
+ unsigned long flags;
+ int ret = -EINVAL;
+ int i;
+
+ if (!pwrdm || !clkdm)
+ return -EINVAL;
+
+ pr_debug("powerdomain: dissociating clockdomain %s from powerdomain "
+ "%s\n", clkdm->name, pwrdm->name);
+
+ write_lock_irqsave(&pwrdm_rwlock, flags);
+
+ for (i = 0; i < PWRDM_MAX_CLKDMS; i++)
+ if (pwrdm->pwrdm_clkdms[i] == clkdm)
+ break;
+
+ if (i == PWRDM_MAX_CLKDMS) {
+ pr_debug("powerdomain: clkdm %s not associated with pwrdm "
+ "%s ?!\n", clkdm->name, pwrdm->name);
+ ret = -ENOENT;
+ goto pdc_exit;
+ }
+
+ pwrdm->pwrdm_clkdms[i] = NULL;
+
+ ret = 0;
+
+pdc_exit:
+ write_unlock_irqrestore(&pwrdm_rwlock, flags);
+
+ return ret;
+}
+
+/**
+ * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm
+ * @pwrdm: struct powerdomain * to iterate over
+ * @fn: callback function *
+ *
+ * Call the supplied function for each clockdomain in the powerdomain
+ * 'pwrdm'. The callback function can return anything but 0 to bail
+ * out early from the iterator. The callback function is called with
+ * the pwrdm_rwlock held for reading, so no powerdomain structure
+ * manipulation functions should be called from the callback, although
+ * hardware powerdomain control functions are fine. Returns -EINVAL
+ * if presented with invalid pointers; or passes along the last return
+ * value of the callback function, which should be 0 for success or
+ * anything else to indicate failure.
+ */
+int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
+ int (*fn)(struct powerdomain *pwrdm,
+ struct clockdomain *clkdm))
+{
+ unsigned long flags;
+ int ret = 0;
+ int i;
+
+ if (!fn)
+ return -EINVAL;
+
+ read_lock_irqsave(&pwrdm_rwlock, flags);
+
+ for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++)
+ ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]);
+
+ read_unlock_irqrestore(&pwrdm_rwlock, flags);
+
+ return ret;
+}
+
+
+/**
* pwrdm_add_wkdep - add a wakeup dependency from pwrdm2 to pwrdm1
* @pwrdm1: wake this struct powerdomain * up (dependent)
* @pwrdm2: when this struct powerdomain * wakes up (source)
diff --git a/arch/arm/plat-omap/include/mach/powerdomain.h b/arch/arm/plat-omap/include/mach/powerdomain.h
index c8f52c6f8b7..5fa666fa9be 100644
--- a/arch/arm/plat-omap/include/mach/powerdomain.h
+++ b/arch/arm/plat-omap/include/mach/powerdomain.h
@@ -44,9 +44,16 @@
*/
#define PWRDM_MAX_MEM_BANKS 4
+/*
+ * Maximum number of clockdomains that can be associated with a powerdomain.
+ * CORE powerdomain is probably the worst case.
+ */
+#define PWRDM_MAX_CLKDMS 3
+
/* XXX A completely arbitrary number. What is reasonable here? */
#define PWRDM_TRANSITION_BAILOUT 100000
+struct clockdomain;
struct powerdomain;
/* Encodes dependencies between powerdomains - statically defined */
@@ -98,6 +105,9 @@ struct powerdomain {
/* Possible memory bank pwrstates when pwrdm is ON */
const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS];
+ /* Clockdomains in this powerdomain */
+ struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
+
struct list_head node;
};
@@ -111,6 +121,12 @@ struct powerdomain *pwrdm_lookup(const char *name);
int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm));
+int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
+int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
+int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
+ int (*fn)(struct powerdomain *pwrdm,
+ struct clockdomain *clkdm));
+
int pwrdm_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);
int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2);