mfd: Support additional parent IDs for wm831x

commit b93cef556162b0f33399bfe5f307c54f51554e09 upstream.

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>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 1a968f34d67911d5029e97e1c67bbb15ebafb60a..8d7182e2498535f8ebce35f36d673b47a932d6ba 100644 (file)
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1463,7 +1463,11 @@ static 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;