diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2013-05-17 14:25:21 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2013-06-18 00:07:49 +0200 |
| commit | f3799e93720b8b722944d86f7a2a0599f5a9d716 (patch) | |
| tree | 2858c0f89bd15296a43bd5bd67d4e31b3c6ec935 /drivers/mfd | |
| parent | mfd: palmas: Remove code which is not necessary for a device tree boot (diff) | |
| download | linux-f3799e93720b8b722944d86f7a2a0599f5a9d716.tar.xz linux-f3799e93720b8b722944d86f7a2a0599f5a9d716.zip | |
mfd: wm8994: Reset device during probe
Ensure that the device is in a known good state. This should have little
practical impact as the runtime PM will reset the device shortly after
probe but it's neater.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/wm8994-core.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c index 00e4fe2f3c75..ccdddf919069 100644 --- a/drivers/mfd/wm8994-core.c +++ b/drivers/mfd/wm8994-core.c @@ -652,6 +652,17 @@ static int wm8994_device_init(struct wm8994 *wm8994, int irq) return ret; } + /* Explicitly put the device into reset in case regulators + * don't get disabled in order to ensure we know the device + * state. + */ + ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, + wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); + if (ret != 0) { + dev_err(wm8994->dev, "Failed to reset device: %d\n", ret); + return ret; + } + if (regmap_patch) { ret = regmap_register_patch(wm8994->regmap, regmap_patch, patch_regs); |