From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120309190204.108530339@linuxfoundation.org> Date: Fri, 09 Mar 2012 11:02:24 -0800 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Mark Brown , Samuel Ortiz Subject: [ 22/95] mfd: Test for jack detection when deciding if wm8994 should suspend In-Reply-To: <20120309194424.GA2134@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mark Brown commit e7c248a049c2aac21bded0b0722caee6f0e57256 upstream. 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 Signed-off-by: Samuel Ortiz Signed-off-by: Greg Kroah-Hartman --- drivers/mfd/wm8994-core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -252,6 +252,20 @@ static int wm8994_suspend(struct device 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)