waterDataDiscreteRateMining memoryOperation.c 袁明明 commit at 2021-03-03

waterDataDiscreteRateMining/dataSharedMemory/memoryOperation.c

@@ -977,3 +977,70 @@ void bfin_gpio_free(unsigned gpio)
 
 	unreserve(gpio, gpio);
 
+	set_label(gpio, "free");
+
+	hard_local_irq_restore(flags);
+}
+EXPORT_SYMBOL(bfin_gpio_free);
+
+#ifdef BFIN_SPECIAL_GPIO_BANKS
+DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES));
+
+int bfin_special_gpio_request(unsigned gpio, const char *label)
+{
+	unsigned long flags;
+
+	flags = hard_local_irq_save();
+
+	/*
+	 * Allow that the identical GPIO can
+	 * be requested from the same driver twice
+	 * Do nothing and return -
+	 */
+
+	if (cmp_label(gpio, label) == 0) {
+		hard_local_irq_restore(flags);
+		return 0;
+	}
+
+	if (unlikely(is_reserved(special_gpio, gpio, 1))) {
+		hard_local_irq_restore(flags);
+		printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
+		       gpio, get_label(gpio));
+
+		return -EBUSY;
+	}
+	if (unlikely(is_reserved(peri, gpio, 1))) {
+		hard_local_irq_restore(flags);
+		printk(KERN_ERR
+		       "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
+		       gpio, get_label(gpio));
+
+		return -EBUSY;
+	}
+
+	reserve(special_gpio, gpio);
+	reserve(peri, gpio);
+
+	set_label(gpio, label);
+	hard_local_irq_restore(flags);
+	port_setup(gpio, GPIO_USAGE);
+
+	return 0;
+}
+EXPORT_SYMBOL(bfin_special_gpio_request);
+
+void bfin_special_gpio_free(unsigned gpio)
+{
+	unsigned long flags;
+
+	might_sleep();
+
+	flags = hard_local_irq_save();
+
+	if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
+		gpio_error(gpio);
+		hard_local_irq_restore(flags);
+		return;
+	}
+