Only fully documented registers are cached in the WM8990 but additional registers exist.
Signed-off-by: Mark Brown broonie@opensource.wolfsonmicro.com --- sound/soc/codecs/wm8990.c | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/codecs/wm8990.c b/sound/soc/codecs/wm8990.c index 572d22b..5c84f02 100644 --- a/sound/soc/codecs/wm8990.c +++ b/sound/soc/codecs/wm8990.c @@ -106,6 +106,7 @@ static const u16 wm8990_reg[] = { 0x0008, /* R60 - PLL1 */ 0x0031, /* R61 - PLL2 */ 0x0026, /* R62 - PLL3 */ + 0x0000, /* R63 - Driver internal */ };
/* @@ -126,10 +127,9 @@ static inline void wm8990_write_reg_cache(struct snd_soc_codec *codec, unsigned int reg, unsigned int value) { u16 *cache = codec->reg_cache; - BUG_ON(reg > (ARRAY_SIZE(wm8990_reg)) - 1);
- /* Reset register is uncached */ - if (reg == 0) + /* Reset register and reserved registers are uncached */ + if (reg == 0 || reg > ARRAY_SIZE(wm8990_reg) - 1) return;
cache[reg] = value;