From 9c24b1672283644adf871244771ebf387dd73f90 Mon Sep 17 00:00:00 2001 From: Mark Brown Date: Fri, 7 Jun 2013 16:19:58 +0100 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- sound/soc/codecs/wm8962.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) 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 @@ static int wm8962_runtime_resume(struct device *dev) 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; -- 2.7.4