[Blackfin] arch: Fix gpio label handling

early serial init also utilizes the peripheral request api - however
at this point bfin_gpio_init didn't allocate memory for the labels.
So we always have two zombies (allocated pin functions without labels)

This happens before the initcalls - We now allocate memory statically.
Define MAX_RESOURCES individually for each cpu.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/kernel/bfin_gpio.c

@@ -179,15 +179,13 @@ 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_peri_map[gpio_bank(MAX_BLACKFIN_GPIOS + 16)];
+static unsigned short reserved_peri_map[gpio_bank(MAX_RESOURCES)];
 
-#define MAX_RESOURCES 		256
 #define RESOURCE_LABEL_SIZE 	16
 
-struct str_ident {
+static struct str_ident {
 	char name[RESOURCE_LABEL_SIZE];
-} *str_ident;
-
+} str_ident[MAX_RESOURCES];
 
 #ifdef CONFIG_PM
 static unsigned short wakeup_map[gpio_bank(MAX_BLACKFIN_GPIOS)];
@@ -251,6 +249,11 @@ static char *get_label(unsigned short ident)
 
 static int cmp_label(unsigned short ident, const char *label)
 {
+	if (label == NULL) {
+		dump_stack();
+		printk(KERN_ERR "Please provide none-null label\n");
+	}
+
 	if (label && str_ident)
 		return strncmp(str_ident[ident].name,
 				 label, strlen(label));
@@ -419,12 +422,6 @@ static void default_gpio(unsigned short gpio)
 
 static int __init bfin_gpio_init(void)
 {
-	str_ident = kcalloc(MAX_RESOURCES,
-				 sizeof(struct str_ident), GFP_KERNEL);
-	if (str_ident == NULL)
-		return -ENOMEM;
-
-	memset(str_ident, 0, MAX_RESOURCES * sizeof(struct str_ident));
 
 	printk(KERN_INFO "Blackfin GPIO Controller\n");
 
@@ -785,6 +782,14 @@ void gpio_pm_restore(void)
 }
 
 #endif
+#else /* BF548_FAMILY */
+
+unsigned short get_gpio_dir(unsigned short gpio)
+{
+	return (0x01 & (gpio_array[gpio_bank(gpio)]->port_dir_clear >> gpio_sub_n(gpio)));
+}
+EXPORT_SYMBOL(get_gpio_dir);
+
 #endif /* BF548_FAMILY */
 
 /***********************************************************
@@ -1204,10 +1209,10 @@ static int gpio_proc_read(char *buf, char **start, off_t offset,
 
 	for (c = 0; c < MAX_RESOURCES; c++) {
 		if (!check_gpio(c) && (reserved_gpio_map[gpio_bank(c)] & gpio_bit(c)))
-			len = sprintf(buf, "GPIO_%d: %s \tGPIO %s\n", c,
+			len = sprintf(buf, "GPIO_%d: %s \t\tGPIO %s\n", c,
 				 get_label(c), get_gpio_dir(c) ? "OUTPUT" : "INPUT");
 		else if (reserved_peri_map[gpio_bank(c)] & gpio_bit(c))
-			len = sprintf(buf, "GPIO_%d: %s \tPeripheral\n", c, get_label(c));
+			len = sprintf(buf, "GPIO_%d: %s \t\tPeripheral\n", c, get_label(c));
 		else
 			continue;
 		buf += len;

include/asm-blackfin/mach-bf527/portmux.h

@@ -1,6 +1,8 @@
 #ifndef _MACH_PORTMUX_H_
 #define _MACH_PORTMUX_H_
 
+#define MAX_RESOURCES 	MAX_BLACKFIN_GPIOS
+
 #define P_PPI0_D0	(P_DEFINED | P_IDENT(GPIO_PF0) | P_FUNCT(0))
 #define P_PPI0_D1	(P_DEFINED | P_IDENT(GPIO_PF1) | P_FUNCT(0))
 #define P_PPI0_D2	(P_DEFINED | P_IDENT(GPIO_PF2) | P_FUNCT(0))

include/asm-blackfin/mach-bf533/portmux.h

@@ -1,6 +1,8 @@
 #ifndef _MACH_PORTMUX_H_
 #define _MACH_PORTMUX_H_
 
+#define MAX_RESOURCES 	MAX_BLACKFIN_GPIOS
+
 #define P_PPI0_CLK	(P_DONTCARE)
 #define P_PPI0_FS1	(P_DONTCARE)
 #define P_PPI0_FS2	(P_DONTCARE)

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

@@ -1,6 +1,8 @@
 #ifndef _MACH_PORTMUX_H_
 #define _MACH_PORTMUX_H_
 
+#define MAX_RESOURCES 	(MAX_BLACKFIN_GPIOS + GPIO_BANKSIZE)	/* We additionally handle PORTJ */
+
 #define P_UART0_TX	(P_DEFINED | P_IDENT(GPIO_PF0) | P_FUNCT(0))
 #define P_UART0_RX	(P_DEFINED | P_IDENT(GPIO_PF1) | P_FUNCT(0))
 #define P_UART1_TX	(P_DEFINED | P_IDENT(GPIO_PF2) | P_FUNCT(0))

include/asm-blackfin/mach-bf548/portmux.h

@@ -1,6 +1,8 @@
 #ifndef _MACH_PORTMUX_H_
 #define _MACH_PORTMUX_H_
 
+#define MAX_RESOURCES 	MAX_BLACKFIN_GPIOS
+
 #define P_SPORT2_TFS	(P_DEFINED | P_IDENT(GPIO_PA0) | P_FUNCT(0))
 #define P_SPORT2_DTSEC	(P_DEFINED | P_IDENT(GPIO_PA1) | P_FUNCT(0))
 #define P_SPORT2_DTPRI	(P_DEFINED | P_IDENT(GPIO_PA2) | P_FUNCT(0))

include/asm-blackfin/mach-bf561/portmux.h

@@ -1,6 +1,8 @@
 #ifndef _MACH_PORTMUX_H_
 #define _MACH_PORTMUX_H_
 
+#define MAX_RESOURCES 	MAX_BLACKFIN_GPIOS
+
 #define P_PPI0_CLK	(P_DONTCARE)
 #define P_PPI0_FS1	(P_DONTCARE)
 #define P_PPI0_FS2	(P_DONTCARE)