[brcm63xx] register gpiochip earlier, allowing gpio-based runtime detection to be performed in board_init callback

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16328 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm63xx/files/arch/mips/bcm63xx/gpio.c

@@ -120,9 +120,8 @@ static struct gpio_chip bcm63xx_gpio_chip = {
 	.ngpio			= BCM63XX_GPIO_COUNT,
 };
 
-static int __init bcm63xx_gpio_init(void)
+int __init bcm63xx_gpio_init(void)
 {
 	printk(KERN_INFO "registering %d GPIOs\n", BCM63XX_GPIO_COUNT);
 	return gpiochip_add(&bcm63xx_gpio_chip);
 }
-arch_initcall(bcm63xx_gpio_init);

target/linux/brcm63xx/files/arch/mips/bcm63xx/prom.c

@@ -13,6 +13,7 @@
 #include <bcm63xx_cpu.h>
 #include <bcm63xx_io.h>
 #include <bcm63xx_regs.h>
+#include <bcm63xx_gpio.h>
 
 void __init prom_init(void)
 {
@@ -42,6 +43,9 @@ void __init prom_init(void)
 	/* assign command line from kernel config */
 	strcpy(arcs_cmdline, CONFIG_CMDLINE);
 
+	/* register gpiochip */
+	bcm63xx_gpio_init();
+
 	/* do low level board init */
 	board_prom_init();
 }

target/linux/brcm63xx/files/include/asm-mips/mach-bcm63xx/bcm63xx_gpio.h

@@ -1,6 +1,10 @@
 #ifndef BCM63XX_GPIO_H
 #define BCM63XX_GPIO_H
 
+#include <linux/init.h>
+
+int __init bcm63xx_gpio_init(void);
+
 /* all helpers will BUG() if gpio count is >= 37. */
 #define BCM63XX_GPIO_COUNT	37