waterDataStatistics memoryCall.c 朱俊杰 commit at 2021-02-02

waterDataStatistics/dataSharedMemory/memoryCall.c

@@ -820,3 +820,145 @@ int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
 	return ret;
 }
 
+/**
+ * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
+ * @pwrdm: struct powerdomain * to clear
+ *
+ * Clear the powerdomain's previous power state register @pwrdm.
+ * Clears the entire register, including logic and memory bank
+ * previous power states.  Returns -EINVAL if the powerdomain pointer
+ * is null, or returns 0 upon success.
+ */
+int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
+{
+	int ret = -EINVAL;
+
+	if (!pwrdm)
+		return ret;
+
+	/*
+	 * XXX should get the powerdomain's current state here;
+	 * warn & fail if it is not ON.
+	 */
+
+	pr_debug("powerdomain: %s: clearing previous power state reg\n",
+		 pwrdm->name);
+
+	if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst)
+		ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm);
+
+	return ret;
+}
+
+/**
+ * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm
+ * @pwrdm: struct powerdomain *
+ *
+ * Enable automatic context save-and-restore upon power state change
+ * for some devices in the powerdomain @pwrdm.  Warning: this only
+ * affects a subset of devices in a powerdomain; check the TRM
+ * closely.  Returns -EINVAL if the powerdomain pointer is null or if
+ * the powerdomain does not support automatic save-and-restore, or
+ * returns 0 upon success.
+ */
+int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
+{
+	int ret = -EINVAL;
+
+	if (!pwrdm)
+		return ret;
+
+	if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
+		return ret;
+
+	pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n", pwrdm->name);
+
+	if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar)
+		ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm);
+
+	return ret;
+}
+
+/**
+ * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm
+ * @pwrdm: struct powerdomain *
+ *
+ * Disable automatic context save-and-restore upon power state change
+ * for some devices in the powerdomain @pwrdm.  Warning: this only
+ * affects a subset of devices in a powerdomain; check the TRM
+ * closely.  Returns -EINVAL if the powerdomain pointer is null or if
+ * the powerdomain does not support automatic save-and-restore, or
+ * returns 0 upon success.
+ */
+int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
+{
+	int ret = -EINVAL;
+
+	if (!pwrdm)
+		return ret;
+
+	if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
+		return ret;
+
+	pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n", pwrdm->name);
+
+	if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar)
+		ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm);
+
+	return ret;
+}
+
+/**
+ * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
+ * @pwrdm: struct powerdomain *
+ *
+ * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
+ * for some devices, or 0 if it does not.
+ */
+bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
+{
+	return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0;
+}
+
+/**
+ * pwrdm_set_lowpwrstchange - Request a low power state change
+ * @pwrdm: struct powerdomain *
+ *
+ * Allows a powerdomain to transtion to a lower power sleep state
+ * from an existing sleep state without waking up the powerdomain.
+ * Returns -EINVAL if the powerdomain pointer is null or if the
+ * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0
+ * upon success.
+ */
+int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
+{
+	int ret = -EINVAL;
+
+	if (!pwrdm)
+		return -EINVAL;
+
+	if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
+		return -EINVAL;
+
+	pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
+		 pwrdm->name);
+
+	if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange)
+		ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm);
+
+	return ret;
+}
+
+/**
+ * pwrdm_wait_transition - wait for powerdomain power transition to finish
+ * @pwrdm: struct powerdomain * to wait for
+ *
+ * If the powerdomain @pwrdm is in the process of a state transition,
+ * spin until it completes the power transition, or until an iteration
+ * bailout value is reached. Returns -EINVAL if the powerdomain
+ * pointer is null, -EAGAIN if the bailout value was reached, or
+ * returns 0 upon success.
+ */
+int pwrdm_wait_transition(struct powerdomain *pwrdm)
+{
+	int ret = -EINVAL;