Blackfin arch: fix bug - gpio_bank() macros messed up bank number caculating with positioning a gpio

The whole story:

Before BF51x merged, all the MAX_BLACKFIN_GPIOS are integral multiple of GPIO_BANKSIZE (= 16).
But BF51x provides MAX_BLACKFIN_GPIOS = 40 which includes 3 banks and the 3rd bank has only 8
GPIO pins.

Therefore, gpio_bank() macros is correct when you try to find a GPIO in which bank (GPIO_35 is
in bank 2). But on BF51x gpio_bank(MAX_BLACKFIN_GPIOS) only gives out 2 banks instead of 3
banks for some static array initialization.

This patch add a new macros gpio_bank_n() and GPIO_BANK_NUM to do bank number caculating and
remain the gpio_bank() macros for positioning a gpio in which bank.

Signed-off-by: Bryan Wu <cooloney@kernel.org>

arch/blackfin/include/asm/gpio.h

@@ -85,10 +85,12 @@
 #define __ARCH_BLACKFIN_GPIO_H__
 
 #define gpio_bank(x) ((x) >> 4)
+#define gpio_bank_n(x) ((x) & 0xF ? ((x) >> 4) + 1 : (x) >> 4)
 #define gpio_bit(x)  (1<<((x) & 0xF))
 #define gpio_sub_n(x) ((x) & 0xF)
 
 #define GPIO_BANKSIZE 16
+#define GPIO_BANK_NUM gpio_bank_n(MAX_BLACKFIN_GPIOS)
 
 #define	GPIO_0	0
 #define	GPIO_1	1

arch/blackfin/kernel/bfin_gpio.c

@@ -120,19 +120,19 @@ enum {
 #endif
 
 #if defined(BF533_FAMILY) || defined(BF538_FAMILY)
-static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+static struct gpio_port_t *gpio_bankb[] = {
 	(struct gpio_port_t *) FIO_FLAG_D,
 };
 #endif
 
 #if defined(BF527_FAMILY) || defined(BF537_FAMILY) || defined(BF518_FAMILY)
-static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+static struct gpio_port_t *gpio_bankb[] = {
 	(struct gpio_port_t *) PORTFIO,
 	(struct gpio_port_t *) PORTGIO,
 	(struct gpio_port_t *) PORTHIO,
 };
 
-static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+static unsigned short *port_fer[] = {
 	(unsigned short *) PORTF_FER,
 	(unsigned short *) PORTG_FER,
 	(unsigned short *) PORTH_FER,
@@ -140,7 +140,7 @@ static unsigned short *port_fer[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 #endif
 
 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
-static unsigned short *port_mux[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+static unsigned short *port_mux[] = {
 	(unsigned short *) PORTF_MUX,
 	(unsigned short *) PORTG_MUX,
 	(unsigned short *) PORTH_MUX,
@@ -155,7 +155,7 @@ u8 pmux_offset[][16] =
 #endif
 
 #ifdef BF561_FAMILY
-static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+static struct gpio_port_t *gpio_bankb[] = {
 	(struct gpio_port_t *) FIO0_FLAG_D,
 	(struct gpio_port_t *) FIO1_FLAG_D,
 	(struct gpio_port_t *) FIO2_FLAG_D,
@@ -163,7 +163,7 @@ static struct gpio_port_t *gpio_bankb[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 #endif
 
 #ifdef BF548_FAMILY
-static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
+static struct gpio_port_t *gpio_array[] = {
 	(struct gpio_port_t *)PORTA_FER,
 	(struct gpio_port_t *)PORTB_FER,
 	(struct gpio_port_t *)PORTC_FER,
@@ -177,7 +177,7 @@ static struct gpio_port_t *gpio_array[gpio_bank(MAX_BLACKFIN_GPIOS)] = {
 };
 #endif
 
-static unsigned short reserved_gpio_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static unsigned short reserved_gpio_map[GPIO_BANK_NUM];
 static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
 
 #define RESOURCE_LABEL_SIZE 	16
@@ -188,30 +188,30 @@ static struct str_ident {
 
 #if defined(CONFIG_PM)
 #if defined(CONFIG_BF54x)
-static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
 #else
-static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static unsigned short wakeup_map[GPIO_BANK_NUM];
 static unsigned char wakeup_flags_map[MAX_BLACKFIN_GPIOS];
-static struct gpio_port_s gpio_bank_saved[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static struct gpio_port_s gpio_bank_saved[GPIO_BANK_NUM];
 
 #ifdef BF533_FAMILY
-static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB};
+static unsigned int sic_iwr_irqs[] = {IRQ_PROG_INTB};
 #endif
 
 #ifdef BF537_FAMILY
-static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
+static unsigned int sic_iwr_irqs[] = {IRQ_PROG_INTB, IRQ_PORTG_INTB, IRQ_MAC_TX};
 #endif
 
 #ifdef BF538_FAMILY
-static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB};
+static unsigned int sic_iwr_irqs[] = {IRQ_PORTF_INTB};
 #endif
 
 #if defined(BF527_FAMILY) || defined(BF518_FAMILY)
-static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
+static unsigned int sic_iwr_irqs[] = {IRQ_PORTF_INTB, IRQ_PORTG_INTB, IRQ_PORTH_INTB};
 #endif
 
 #ifdef BF561_FAMILY
-static unsigned int sic_iwr_irqs[gpio_bank(MAX_BLACKFIN_GPIOS)] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
+static unsigned int sic_iwr_irqs[] = {IRQ_PROG0_INTB, IRQ_PROG1_INTB, IRQ_PROG2_INTB};
 #endif
 #endif
 #endif /* CONFIG_PM */

arch/blackfin/mach-common/ints-priority.c

@@ -377,8 +377,8 @@ static inline void bfin_set_irq_handler(unsigned irq, irq_flow_handler_t handle)
 
 #if !defined(CONFIG_BF54x)
 
-static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static unsigned short gpio_enabled[GPIO_BANK_NUM];
-static unsigned short gpio_edge_triggered[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static unsigned short gpio_edge_triggered[GPIO_BANK_NUM];
 
 extern void bfin_gpio_irq_prepare(unsigned gpio);
 
@@ -620,7 +620,7 @@ static unsigned char irq2pint_lut[NR_PINTS];
 static unsigned char pint2irq_lut[NR_PINT_SYS_IRQS * NR_PINT_BITS];
 
 static unsigned int gpio_both_edge_triggered[NR_PINT_SYS_IRQS];
-static unsigned short gpio_enabled[gpio_bank(MAX_BLACKFIN_GPIOS)];
+static unsigned short gpio_enabled[GPIO_BANK_NUM];
 
 
 struct pin_int_t {