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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-02-21 18:30:31 +0000 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2011-03-23 10:41:49 +0100 |
| commit | f40dff9edbf1daa14068542d60ae22df78e8c74a (patch) | |
| tree | bb2039be7756b764ae52d3b2ea1f11ff202cb551 /drivers/mfd/wm8994-core.c | |
| parent | f66ea457f616258777cb3349f33745b0240e54fd (diff) | |
| download | lwn-f40dff9edbf1daa14068542d60ae22df78e8c74a.tar.gz lwn-f40dff9edbf1daa14068542d60ae22df78e8c74a.zip | |
mfd: Put WM8994 into reset when suspending
Ensure that the chip is in the lowest power mode possible when suspended
by performing a soft reset on it. On early silicon revisions the lowest
power modes can't be entered without using reset so we can't achieve
equivalent results within the individual drivers.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/wm8994-core.c')
| -rw-r--r-- | drivers/mfd/wm8994-core.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index f4016a075fd6..e673bda21f5d 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -271,6 +271,11 @@ static int wm8994_suspend(struct device *dev) if (ret < 0) dev_err(dev, "Failed to save LDO registers: %d\n", ret); + /* Explicitly put the device into reset in case regulators + * don't get disabled in order to ensure consistent restart. + */ + wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 0x8994); + wm8994->suspended = true; ret = regulator_bulk_disable(wm8994->num_supplies, |