gpiolib: Make WM831x GPIO count dynamic

This supports future devices with fewer GPIOs.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

3 files changed, 6 insertions, 3 deletions

diff --git a/drivers/gpio/wm831x-gpio.c b/drivers/gpio/wm831x-gpio.c
index f9c09a54ec7..f5e4934f1da 100644
--- a/drivers/gpio/wm831x-gpio.c
+++ b/drivers/gpio/wm831x-gpio.c
@@ -23,8 +23,6 @@
 #include <linux/mfd/wm831x/pdata.h>
 #include <linux/mfd/wm831x/gpio.h>
 
-#define WM831X_GPIO_MAX 16
-
 struct wm831x_gpio {
         struct wm831x *wm831x;
         struct gpio_chip gpio_chip;
@@ -192,7 +190,7 @@ static int __devinit wm831x_gpio_probe(struct platform_device *pdev)
 
         wm831x_gpio->wm831x = wm831x;
         wm831x_gpio->gpio_chip = template_chip;
-        wm831x_gpio->gpio_chip.ngpio = WM831X_GPIO_MAX;
+        wm831x_gpio->gpio_chip.ngpio = wm831x->num_gpio;
         wm831x_gpio->gpio_chip.dev = &pdev->dev;
         if (pdata && pdata->gpio_base)
                 wm831x_gpio->gpio_chip.base = pdata->gpio_base;
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 8504c6ef4a1..8d386c0c802 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1293,16 +1293,19 @@ static int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
         switch (ret) {
         case WM8310:
                 parent = WM8310;
+                wm831x->num_gpio = 16;
                 dev_info(wm831x->dev, "WM8310 revision %c\n", 'A' + rev);
                 break;
 
         case WM8311:
                 parent = WM8311;
+                wm831x->num_gpio = 16;
                 dev_info(wm831x->dev, "WM8311 revision %c\n", 'A' + rev);
                 break;
 
         case WM8312:
                 parent = WM8312;
+                wm831x->num_gpio = 16;
                 dev_info(wm831x->dev, "WM8312 revision %c\n", 'A' + rev);
                 break;
 
diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h
index 91eb493bf14..c1bc59f6cbf 100644
--- a/include/linux/mfd/wm831x/core.h
+++ b/include/linux/mfd/wm831x/core.h
@@ -253,6 +253,8 @@ struct wm831x {
         unsigned int irq_base;
         int irq_masks[5];
 
+        int num_gpio;
+
         struct mutex auxadc_lock;
 
         /* The WM831x has a security key blocking access to certain