Blackfin arch: fix PORT_J BUG for BF537/6 EMAC driver reported by Kalle Pokki <kalle.pokki@iki.fi>

Cc: Kalle Pokki <kalle.pokki@iki.fi>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/kernel/bfin_gpio.c

@@ -180,11 +180,13 @@ static int cmp_label(unsigned short ident, const char *label)
 #ifdef BF537_FAMILY
 static void port_setup(unsigned short gpio, unsigned short usage)
 {
-	if (usage == GPIO_USAGE) {
-		*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
-	} else
-		*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
-	SSYNC();
+	if (!check_gpio(gpio)) {
+		if (usage == GPIO_USAGE) {
+			*port_fer[gpio_bank(gpio)] &= ~gpio_bit(gpio);
+		} else
+			*port_fer[gpio_bank(gpio)] |= gpio_bit(gpio);
+		SSYNC();
+	}
 }
 #else
 # define port_setup(...)  do { } while (0)
@@ -644,11 +646,10 @@ int peripheral_request(unsigned short per, const char *label)
 	if (!(per & P_DEFINED))
 		return -ENODEV;
 
-	if (check_gpio(ident) < 0)
-		return -EINVAL;
-
 	local_irq_save(flags);
 
+	if (!check_gpio(ident)) {
+
 	if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
 		printk(KERN_ERR
 		       "%s: Peripheral %d is already reserved as GPIO by %s !\n",
@@ -658,6 +659,8 @@ int peripheral_request(unsigned short per, const char *label)
 		return -EBUSY;
 	}
 
+	}
+
 	if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {
 
 	/*

include/asm-blackfin/mach-bf537/portmux.h

@@ -106,4 +106,37 @@
 #define P_SPI0_SSEL2	(P_DEFINED | P_IDENT(PORT_PJ11) | P_FUNCT(1))
 #define P_SPI0_SSEL7	(P_DEFINED | P_IDENT(PORT_PJ5) | P_FUNCT(2))
 
-#endif				/* _MACH_PORTMUX_H_ */
+#define P_MII0 {\
+	P_MII0_ETxD0, \
+	P_MII0_ETxD1, \
+	P_MII0_ETxD2, \
+	P_MII0_ETxD3, \
+	P_MII0_ETxEN, \
+	P_MII0_TxCLK, \
+	P_MII0_PHYINT, \
+	P_MII0_COL, \
+	P_MII0_ERxD0, \
+	P_MII0_ERxD1, \
+	P_MII0_ERxD2, \
+	P_MII0_ERxD3, \
+	P_MII0_ERxDV, \
+	P_MII0_ERxCLK, \
+	P_MII0_ERxER, \
+	P_MII0_CRS, \
+	P_MDC, \
+	P_MDIO, 0}
+
+
+#define P_RMII0 {\
+	P_MII0_ETxD0, \
+	P_MII0_ETxD1, \
+	P_MII0_ETxEN, \
+	P_MII0_ERxD0, \
+	P_MII0_ERxD1, \
+	P_MII0_ERxER, \
+	P_RMII0_REF_CLK, \
+	P_RMII0_MDINT, \
+	P_RMII0_CRS_DV, \
+	P_MDC, \
+	P_MDIO, 0}
+#endif			        	/* _MACH_PORTMUX_H_ */