1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/gpio/wm8994-gpio.c b/drivers/gpio/wm8994-gpio.c
index 618398e4ed8e..c822baacd8fc 100644
--- a/drivers/gpio/wm8994-gpio.c
+++ b/drivers/gpio/wm8994-gpio.c
@@ -35,6 +35,29 @@ static inline struct wm8994_gpio *to_wm8994_gpio(struct gpio_chip *chip)
         return container_of(chip, struct wm8994_gpio, gpio_chip);
 }
 
+static int wm8994_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+        struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
+        struct wm8994 *wm8994 = wm8994_gpio->wm8994;
+
+        switch (wm8994->type) {
+        case WM8958:
+                switch (offset) {
+                case 1:
+                case 2:
+                case 3:
+                case 4:
+                case 6:
+                        return -EINVAL;
+                }
+                break;
+        default:
+                break;
+        }
+
+        return 0;
+}
+
 static int wm8994_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
 {
         struct wm8994_gpio *wm8994_gpio = to_wm8994_gpio(chip);
@@ -136,6 +159,7 @@ static void wm8994_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 static struct gpio_chip template_chip = {
         .label                  = "wm8994",
         .owner                  = THIS_MODULE,
+        .request                = wm8994_gpio_request,
         .direction_input        = wm8994_gpio_direction_in,
         .get                    = wm8994_gpio_get,
         .direction_output       = wm8994_gpio_direction_out,