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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>
This commit is contained in:
Mark Brown 2011-12-01 17:19:44 +00:00
parent d0616bbed1
commit a3462490b4
1 changed files with 14 additions and 0 deletions
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14
drivers/mfd/wm8994-core.c
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@ -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)