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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>
hifive-unleashed-5.1
Mark Brown 2013-05-17 13:25:21 +01:00 committed by Samuel Ortiz
parent 1ee5d8c85a
commit f3799e9372
1 changed files with 11 additions and 0 deletions
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11
drivers/mfd/wm8994-core.c
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@ -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);