On Fri, May 28, 2021 at 12:50:59PM +0200, Vincent Knecht wrote:
Add specific init function to poke needed registers & values for this IC
Signed-off-by: Vincent Knecht vincent.knecht@mailoo.org
sound/soc/codecs/tfa989x.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)
diff --git a/sound/soc/codecs/tfa989x.c b/sound/soc/codecs/tfa989x.c index 408e26eee108..6d94865c534b 100644 --- a/sound/soc/codecs/tfa989x.c +++ b/sound/soc/codecs/tfa989x.c @@ -44,6 +44,7 @@ #define TFA989X_CURRENTSENSE4 0x49
#define TFA9895_REVISION 0x12 +#define TFA9897_REVISION 0x97
struct tfa989x_rev { unsigned int rev; @@ -175,6 +176,29 @@ static const struct tfa989x_rev tfa9895_rev = { .init = tfa9895_init, };
+static int tfa9897_init(struct regmap *regmap) +{
- int ret;
- /* Reduce slewrate by clearing iddqtestbst to avoid booster damage */
- ret = regmap_write(regmap, TFA989X_CURRENTSENSE3, 0x0300);
- if (ret)
return ret;- /* Enable clipping */
- ret = regmap_clear_bits(regmap, TFA989X_CURRENTSENSE4, 0x1);
- if (ret)
return ret;- /* Set required TDM configuration */
- return regmap_write(regmap, 0x14, 0x0);
For reference:
Sadly we didn't manage to figure out what exactly this register does. There are several TDM related registers but they are not really documented. Devices usually have fixed register values specified in some configuration file, but it's not clear how to set these in a generic way (e.g. based on dai->set_tdm_slot(), dai->set_tdm_slot() etc).
On the device where we tested TFA9897 it's just used with standard I2S so we didn't need any special TDM configuration(?). I suppose we can leave this open for future improvements if someone needs something different here.
So: Reviewed-by: Stephan Gerhold stephan@gerhold.net
Thanks! Stephan
+}
+static const struct tfa989x_rev tfa9897_rev = {
- .rev = TFA9897_REVISION,
- .init = tfa9897_init,
+};
/*
- Note: At the moment this driver bypasses the "CoolFlux DSP" built into the
- TFA989X amplifiers. Unfortunately, there seems to be absolutely
@@ -280,6 +304,7 @@ static int tfa989x_i2c_probe(struct i2c_client *i2c)
static const struct of_device_id tfa989x_of_match[] = { { .compatible = "nxp,tfa9895", .data = &tfa9895_rev },
- { .compatible = "nxp,tfa9897", .data = &tfa9897_rev }, { }
}; MODULE_DEVICE_TABLE(of, tfa989x_of_match); -- 2.31.1