* [PATCH 3.3] mfd: Test for jack detection when deciding if wm8994 should suspend
@ 2012-02-20 21:32 Mark Brown
2012-02-21 10:50 ` Samuel Ortiz
0 siblings, 1 reply; 2+ messages in thread
From: Mark Brown @ 2012-02-20 21:32 UTC (permalink / raw)
To: Samuel Ortiz; +Cc: linux-kernel, Mark Brown, stable
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
---
Samuel, could you please add this to your for-linus branch? It's been
sitting around unloved for some considerable time now...
drivers/mfd/wm8994-core.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index f117e7f..a04b3c1 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)
--
1.7.9
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2012-02-20 21:32 [PATCH 3.3] mfd: Test for jack detection when deciding if wm8994 should suspend Mark Brown
2012-02-21 10:50 ` Samuel Ortiz
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