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mfd: Put WM8994 into cache only mode when suspending

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This is required by the ASoC driver for very low power modes where the
device is fully idle but we want to update controls.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown 2012-01-09 00:36:42 -08:00
parent b2ed1b0bc6
commit 3befc925cb
1 changed files with 2 additions and 0 deletions
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2
drivers/mfd/wm8994-core.c
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@ -268,6 +268,7 @@ static int wm8994_suspend(struct device *dev)
wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET,
wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET));
regcache_cache_only(wm8994->regmap, true);
regcache_mark_dirty(wm8994->regmap);
wm8994->suspended = true;
@ -298,6 +299,7 @@ static int wm8994_resume(struct device *dev)
return ret;
}
regcache_cache_only(wm8994->regmap, false);
ret = regcache_sync(wm8994->regmap);
if (ret != 0) {
dev_err(dev, "Failed to restore register map: %d\n", ret);