1 files changed, 12 insertions, 5 deletions

diff --git a/drivers/sh/pfc.c b/drivers/sh/pfc.c
index cf0303acab8e..75934e3ea34e 100644
--- a/drivers/sh/pfc.c
+++ b/drivers/sh/pfc.c
@@ -7,6 +7,8 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
@@ -559,10 +561,8 @@ static int sh_gpio_get_value(struct pinmux_info *gpioc, unsigned gpio)
         struct pinmux_data_reg *dr = NULL;
         int bit = 0;
 
-        if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0) {
-                BUG();
-                return 0;
-        }
+        if (!gpioc || get_data_reg(gpioc, gpio, &dr, &bit) != 0)
+                return -EINVAL;
 
         return gpio_read_reg(dr->reg, dr->reg_width, 1, bit);
 }
@@ -581,7 +581,7 @@ int register_pinmux(struct pinmux_info *pip)
 {
         struct gpio_chip *chip = &pip->chip;
 
-        pr_info("sh pinmux: %s handling gpio %d -> %d\n",
+        pr_info("%s handling gpio %d -> %d\n",
                 pip->name, pip->first_gpio, pip->last_gpio);
 
         setup_data_regs(pip);
@@ -602,3 +602,10 @@ int register_pinmux(struct pinmux_info *pip)
 
         return gpiochip_add(chip);
 }
+
+int unregister_pinmux(struct pinmux_info *pip)
+{
+        pr_info("%s deregistering\n", pip->name);
+
+        return gpiochip_remove(&pip->chip);
+}