ASoC: wm8962: Restore device state after reset in runtime resume
After the device has been reset we need to repeat the same
initialisation we do on probe to make sure that the device is in
a known state.
Tested-by: Nicolin Chen <b42378@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 26219ea..7a7a056 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -3756,6 +3756,21 @@
wm8962_reset(wm8962);
+ /* SYSCLK defaults to on; make sure it is off so we can safely
+ * write to registers if the device is declocked.
+ */
+ regmap_update_bits(wm8962->regmap, WM8962_CLOCKING2,
+ WM8962_SYSCLK_ENA, 0);
+
+ /* Ensure we have soft control over all registers */
+ regmap_update_bits(wm8962->regmap, WM8962_CLOCKING2,
+ WM8962_CLKREG_OVD, WM8962_CLKREG_OVD);
+
+ /* Ensure that the oscillator and PLLs are disabled */
+ regmap_update_bits(wm8962->regmap, WM8962_PLL2,
+ WM8962_OSC_ENA | WM8962_PLL2_ENA | WM8962_PLL3_ENA,
+ 0);
+
regcache_sync(wm8962->regmap);
return 0;