linux-kernel - [PATCH] mfd: Test for jack detection when deciding if wm8994 should

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Message-Id: <1326217634-9643-1-git-send-email-broonie@opensource.wolfsonmicro.com>
Date:	Tue, 10 Jan 2012 17:47:14 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Samuel Ortiz <sameo@...ux.intel.com>
Cc:	linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.de>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	stable@...r.kernel.org
Subject: [PATCH] mfd: Test for jack detection when deciding if wm8994 should

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@...nsource.wolfsonmicro.com>
Cc: stable@...r.kernel.org
---

This looks not to have made it in - I sent it as a fix for 3.2 but it
doesn't seem to have been applied.  Should I get it included in the ASoC
merge or will you take it?

 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)
-- 
1.7.7.3

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