From a3462490b4d354c94031bfe644c65d374fc04aa6 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Thu, 1 Dec 2011 17:19:44 +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 Acked-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 93f8599..9b8d1ad 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -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) -- 2.7.4