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>
Cc: stable@vger.kernel.org
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index f117e7fb932194fc174ed52439dadcd57e81684c..a04b3c108c8ca38a06f54ac946f77ce4ec920f0c 100644 (file)
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -256,6 +256,20 @@ 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)