3 files changed, 17 insertions, 0 deletions

diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index 03af3b12c020..56c363c240a9 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -1301,6 +1301,9 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
 
         switch (mask_rev) {
         case 0:
+                wm8350->pmic.max_dcdc = WM8350_DCDC_6;
+                wm8350->pmic.max_isink = WM8350_ISINK_B;
+
                 switch (chip_rev) {
                 case WM8350_REV_E:
                         dev_info(wm8350->dev, "WM8350 Rev E\n");
@@ -1325,6 +1328,9 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
                 break;
 
         case 2:
+                wm8350->pmic.max_dcdc = WM8350_DCDC_6;
+                wm8350->pmic.max_isink = WM8350_ISINK_B;
+
                 switch (chip_rev) {
                 case 0:
                         dev_info(wm8350->dev, "WM8352 Rev A\n");
diff --git a/drivers/regulator/wm8350-regulator.c b/drivers/regulator/wm8350-regulator.c
index 1f44b17e23b1..c68c496b2c49 100644
--- a/drivers/regulator/wm8350-regulator.c
+++ b/drivers/regulator/wm8350-regulator.c
@@ -1380,6 +1380,13 @@ int wm8350_register_regulator(struct wm8350 *wm8350, int reg,
         if (wm8350->pmic.pdev[reg])
                 return -EBUSY;
 
+        if (reg >= WM8350_DCDC_1 && reg <= WM8350_DCDC_6 &&
+            reg > wm8350->pmic.max_dcdc)
+                return -ENODEV;
+        if (reg >= WM8350_ISINK_A && reg <= WM8350_ISINK_B &&
+            reg > wm8350->pmic.max_isink)
+                return -ENODEV;
+
         pdev = platform_device_alloc("wm8350-regulator", reg);
         if (!pdev)
                 return -ENOMEM;
diff --git a/include/linux/mfd/wm8350/pmic.h b/include/linux/mfd/wm8350/pmic.h
index 69b69e07f62f..96acbfc8aa12 100644
--- a/include/linux/mfd/wm8350/pmic.h
+++ b/include/linux/mfd/wm8350/pmic.h
@@ -701,6 +701,10 @@ struct platform_device;
 struct regulator_init_data;
 
 struct wm8350_pmic {
+        /* Number of regulators of each type on this device */
+        int max_dcdc;
+        int max_isink;
+
         /* ISINK to DCDC mapping */
         int isink_A_dcdc;
         int isink_B_dcdc;