mfd: Test for jack detection when deciding if wm8994 should suspend

The jack detection on WM1811 is often required during system suspend, add
it as another check when deciding if we should suspend.

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

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index 93f8599aba32..9b8d1ad28ee1 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -241,6 +241,20 @@ static int wm8994_suspend(struct device *dev)
                 break;
         }
 
+        switch (wm8994->type) {
+        case WM1811:
+                ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2);
+                if (ret < 0) {
+                        dev_err(dev, "Failed to read jackdet: %d\n", ret);
+                } else if (ret & WM1811_JACKDET_MODE_MASK) {
+                        dev_dbg(dev, "CODEC still active, ignoring suspend\n");
+                        return 0;
+                }
+                break;
+        default:
+                break;
+        }
+
         /* Disable LDO pulldowns while the device is suspended if we
          * don't know that something will be driving them. */
         if (!wm8994->ldo_ena_always_driven)