mfd: Support configurable numbers of DCDCs and ISINKs on WM8350

Some WM8350 variants have fewer DCDCs and ISINKs. Identify these at
probe and refuse to use the absent DCDCs when running on these chips.

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

1 files changed, 7 insertions, 0 deletions

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;