ASoC: sun4i-i2s: Fix sun8i volatile regs

The FIFO TX reg is volatile and sun8i i2s register
mapping is different from sun4i.

Even if in this case it's doesn't create an issue,
Avoid setting some regs that are undefined in sun8i.

Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
Link: https://lore.kernel.org/r/20201030144648.397824-8-peron.clem@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 786731191d901172083d475558752e267adaca96..003610c0badffbca471fb683e0d214c57695872b 100644 (file)
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c
@@ -1162,12 +1162,19 @@ static bool sun8i_i2s_rd_reg(struct device *dev, unsigned int reg)
 
 static bool sun8i_i2s_volatile_reg(struct device *dev, unsigned int reg)
 {
-       if (reg == SUN8I_I2S_INT_STA_REG)
+       switch (reg) {
+       case SUN4I_I2S_FIFO_CTRL_REG:
+       case SUN4I_I2S_FIFO_RX_REG:
+       case SUN4I_I2S_FIFO_STA_REG:
+       case SUN4I_I2S_RX_CNT_REG:
+       case SUN4I_I2S_TX_CNT_REG:
+       case SUN8I_I2S_FIFO_TX_REG:
+       case SUN8I_I2S_INT_STA_REG:
                return true;
-       if (reg == SUN8I_I2S_FIFO_TX_REG)
-               return false;
 
-       return sun4i_i2s_volatile_reg(dev, reg);
+       default:
+               return false;
+       }
 }
 
 static const struct reg_default sun4i_i2s_reg_defaults[] = {