waterDataDiscreteRateMining memoryOperation.c 袁明明 commit at 2020-12-22

waterDataDiscreteRateMining/dataSharedMemory/memoryOperation.c

@@ -728,3 +728,66 @@ unsigned short get_gpio_dir(unsigned gpio)
 }
 EXPORT_SYMBOL(get_gpio_dir);
 
+#endif /* CONFIG_BF54x || CONFIG_BF60x */
+
+/***********************************************************
+*
+* FUNCTIONS:	Blackfin Peripheral Resource Allocation
+*		and PortMux Setup
+*
+* INPUTS/OUTPUTS:
+* per	Peripheral Identifier
+* label	String
+*
+* DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
+*
+* CAUTION:
+*************************************************************
+* MODIFICATION HISTORY :
+**************************************************************/
+
+int peripheral_request(unsigned short per, const char *label)
+{
+	unsigned long flags;
+	unsigned short ident = P_IDENT(per);
+
+	/*
+	 * Don't cares are pins with only one dedicated function
+	 */
+
+	if (per & P_DONTCARE)
+		return 0;
+
+	if (!(per & P_DEFINED))
+		return -ENODEV;
+
+	BUG_ON(ident >= MAX_RESOURCES);
+
+	flags = hard_local_irq_save();
+
+	/* If a pin can be muxed as either GPIO or peripheral, make
+	 * sure it is not already a GPIO pin when we request it.
+	 */
+	if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) {
+		if (system_state == SYSTEM_BOOTING)
+			dump_stack();
+		printk(KERN_ERR
+		       "%s: Peripheral %d is already reserved as GPIO by %s !\n",
+		       __func__, ident, get_label(ident));
+		hard_local_irq_restore(flags);
+		return -EBUSY;
+	}
+
+	if (unlikely(is_reserved(peri, ident, 1))) {
+
+		/*
+		 * Pin functions like AMC address strobes my
+		 * be requested and used by several drivers
+		 */
+
+#if defined(CONFIG_BF54x) || defined(CONFIG_BF60x)
+		if (!((per & P_MAYSHARE) && get_portmux(per) == P_FUNCT2MUX(per))) {
+#else
+		if (!(per & P_MAYSHARE)) {
+#endif
+			/*