From d2cb87c23e8514ca49c85adc5924999927bb9494 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Mon, 20 Feb 2012 21:32:32 +0000 Subject: [PATCH] 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 Cc: stable@vger.kernel.org Signed-off-by: Samuel Ortiz --- drivers/mfd/wm8994-core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index c31e6a4..ecc3a42 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) -- 2.7.4