Only init gpio pins of selected i2c bus

Author: popcornmix

drivers/i2c/busses/i2c-bcm2708.c

@@ -97,16 +97,17 @@ struct bcm2708_i2c {
  *
  * FIXME: This is a hack. Use pinmux / pinctrl.
  */
-static void bcm2708_i2c_init_pinmode(void)
+static void bcm2708_i2c_init_pinmode(int id)
 {
 #define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7<<(((g)%10)*3))
 #define SET_GPIO_ALT(g,a) *(gpio+(((g)/10))) |= (((a)<=3?(a)+4:(a)==4?3:2)<<(((g)%10)*3))
 
 	int pin;
 	u32 *gpio = ioremap(0x20200000, SZ_16K);
 
+        BUG_ON(id != 0 && id != 1);
 	/* BSC0 is on GPIO 0 & 1, BSC1 is on GPIO 2 & 3 */
-	for (pin = 0; pin <= 3; pin++) {
+	for (pin = id*2+0; pin <= id*2+1; pin++) {
 		INP_GPIO(pin);		/* set mode to GPIO input first */
 		SET_GPIO_ALT(pin, 0);	/* set mode to ALT 0 */
 	}
@@ -279,7 +280,7 @@ static int __devinit bcm2708_i2c_probe(struct platform_device *pdev)
 		return PTR_ERR(clk);
 	}
 
-	bcm2708_i2c_init_pinmode();
+	bcm2708_i2c_init_pinmode(pdev->id);
 
 	bi = kzalloc(sizeof(*bi), GFP_KERNEL);
 	if (!bi)