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Subject[ 22/95] mfd: Test for jack detection when deciding if wm8994 should suspend
3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Brown <broonie@opensource.wolfsonmicro.com>

commit e7c248a049c2aac21bded0b0722caee6f0e57256 upstream.

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>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/mfd/wm8994-core.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -252,6 +252,20 @@ static int wm8994_suspend(struct device
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)



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