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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-02-21 01:32:32 +0400
committerSamuel Ortiz <sameo@linux.intel.com>2012-03-06 21:46:41 +0400
commitd2cb87c23e8514ca49c85adc5924999927bb9494 (patch)
treebd939c95f458e6c42a66a87c928622adc36a5360 /drivers/mfd/wm8994-core.c
parentee67b0cd5ed69953a6306efabd6e9e23bff09178 (diff)
downloadlinux-d2cb87c23e8514ca49c85adc5924999927bb9494.tar.xz
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>
Diffstat (limited to 'drivers/mfd/wm8994-core.c')
-rw-r--r--drivers/mfd/wm8994-core.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index c31e6a42b241..ecc3a42160f9 100644
--- 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)