From: Mark Brown <broonie@opensource.wolfsonmicro.com>
Date: Mon, 20 Feb 2012 21:32:32 +0000 (+0000)
Subject: mfd: Test for jack detection when deciding if wm8994 should suspend
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d2cb87c23e8514ca49c85adc5924999927bb9494;p=linux-beck.git

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 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)