mfd: rdc321x: Fix off-by-one for ngpio setting

The valid gpio is GPIO0 ~ GPIO58, so ngpio should be 59.
This patch also renames RDC321X_MAX_GPIO to RDC321X_NUM_GPIO because it
actually means the number of available GPIOs.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/mfd/rdc321x-southbridge.c b/drivers/mfd/rdc321x-southbridge.c
index c79569750be9..6575585f1d1f 100644
--- a/drivers/mfd/rdc321x-southbridge.c
+++ b/drivers/mfd/rdc321x-southbridge.c
@@ -38,7 +38,7 @@ static struct resource rdc321x_wdt_resource[] = {
 };
 
 static struct rdc321x_gpio_pdata rdc321x_gpio_pdata = {
-        .max_gpios      = RDC321X_MAX_GPIO,
+        .max_gpios      = RDC321X_NUM_GPIO,
 };
 
 static struct resource rdc321x_gpio_resources[] = {
diff --git a/include/linux/mfd/rdc321x.h b/include/linux/mfd/rdc321x.h
index 4bdf19c8eedf..442743a8f915 100644
--- a/include/linux/mfd/rdc321x.h
+++ b/include/linux/mfd/rdc321x.h
@@ -12,7 +12,7 @@
 #define RDC321X_GPIO_CTRL_REG2  0x84
 #define RDC321X_GPIO_DATA_REG2  0x88
 
-#define RDC321X_MAX_GPIO        58
+#define RDC321X_NUM_GPIO        59
 
 struct rdc321x_gpio_pdata {
         struct pci_dev *sb_pdev;