efHotAgingTrendMining environmentalHumidityAnalysis.c 朱俊杰 commit at 2021-03-24

efHotAgingTrendMining/analysisOfEnvironmentalFactors/environmentalHumidityAnalysis.c

@@ -895,3 +895,127 @@ bool clkdm_in_hwsup(struct clockdomain *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;
+}
+
+/**
+ * clkdm_missing_idle_reporting - can @clkdm enter autoidle even if in use?
+ * @clkdm: struct clockdomain *
+ *
+ * Returns true if clockdomain @clkdm has the
+ * CLKDM_MISSING_IDLE_REPORTING flag set, or false if not or @clkdm is
+ * null.  More information is available in the documentation for the
+ * CLKDM_MISSING_IDLE_REPORTING macro.
+ */
+bool clkdm_missing_idle_reporting(struct clockdomain *clkdm)
+{
+	if (!clkdm)
+		return false;
+
+	return (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) ? true : false;
+}
+
+/* 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);
+
+	/*
+	 * 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);
+		return 0;
+	}
+
+	arch_clkdm->clkdm_clk_enable(clkdm);
+	pwrdm_state_switch(clkdm->pwrdm.ptr);
+	spin_unlock_irqrestore(&clkdm->lock, flags);
+
+	pr_debug("clockdomain: %s: enabled\n", clkdm->name);
+
+	return 0;
+}
+
+/**
+ * clkdm_clk_enable - add an enabled downstream clock to this clkdm
+ * @clkdm: struct clockdomain *
+ * @clk: struct clk * of the enabled downstream clock
+ *
+ * Increment the usecount of the clockdomain @clkdm and ensure that it
+ * is awake before @clk is enabled.  Intended to be called by
+ * clk_enable() code.  If the clockdomain is in software-supervised
+ * idle mode, force the clockdomain to wake.  If the clockdomain is in
+ * hardware-supervised idle mode, add clkdm-pwrdm autodependencies, to
+ * ensure that devices in the clockdomain can be read from/written to
+ * by on-chip processors.  Returns -EINVAL if passed null pointers;
+ * returns 0 upon success or if the clockdomain is in hwsup idle mode.
+ */
+int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
+{
+	/*
+	 * XXX Rewrite this code to maintain a list of enabled
+	 * downstream clocks for debugging purposes?
+	 */
+
+	if (!clk)
+		return -EINVAL;
+
+	return _clkdm_clk_hwmod_enable(clkdm);
+}
+
+/**
+ * clkdm_clk_disable - remove an enabled downstream clock from this clkdm
+ * @clkdm: struct clockdomain *
+ * @clk: struct clk * of the disabled downstream clock
+ *
+ * Decrement the usecount of this clockdomain @clkdm when @clk is
+ * disabled.  Intended to be called by clk_disable() code.  If the
+ * clockdomain usecount goes to 0, put the clockdomain to sleep
+ * (software-supervised mode) or remove the clkdm autodependencies
+ * (hardware-supervised mode).  Returns -EINVAL if passed null
+ * pointers; -ERANGE if the @clkdm usecount underflows; or returns 0
+ * upon success or if the clockdomain is in hwsup idle mode.
+ */
+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);
+
+	/* corner case: disabling unused clocks */
+	if ((__clk_get_enable_count(clk) == 0) &&
+	    (atomic_read(&clkdm->usecount) == 0))
+		goto ccd_exit;
+
+	if (atomic_read(&clkdm->usecount) == 0) {
+		spin_unlock_irqrestore(&clkdm->lock, flags);
+		WARN_ON(1); /* underflow */
+		return -ERANGE;
+	}
+
+	if (atomic_dec_return(&clkdm->usecount) > 0) {
+		spin_unlock_irqrestore(&clkdm->lock, flags);
+		return 0;
+	}
+
+	arch_clkdm->clkdm_clk_disable(clkdm);
+	pwrdm_state_switch(clkdm->pwrdm.ptr);
+
+	pr_debug("clockdomain: %s: disabled\n", clkdm->name);
+
+ccd_exit: