mfd: Support additional parent IDs for wm831x

Some newer device revisions add a second parent ID. Support this in
the device validity checks done at startup.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index e1a2f4b78529..76cadcf3b1fe 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1455,7 +1455,11 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
                 dev_err(wm831x->dev, "Failed to read parent ID: %d\n", ret);
                 goto err;
         }
-        if (ret != 0x6204) {
+        switch (ret) {
+        case 0x6204:
+        case 0x6246:
+                break;
+        default:
                 dev_err(wm831x->dev, "Device is not a WM831x: ID %x\n", ret);
                 ret = -EINVAL;
                 goto err;