ASoC: twl6040: Function to fetch the TRIM values

Provide API to fetch the TRIM values (for machine drivers)

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/codecs/twl6040.c b/sound/soc/codecs/twl6040.c
index 7226ae7..0a8728e 100644
--- a/sound/soc/codecs/twl6040.c
+++ b/sound/soc/codecs/twl6040.c
@@ -1072,6 +1072,15 @@
 }
 EXPORT_SYMBOL_GPL(twl6040_get_clk_id);
 
+int twl6040_get_trim_value(struct snd_soc_codec *codec, enum twl6040_trim trim)
+{
+	if (unlikely(trim >= TWL6040_TRIM_INVAL))
+		return -EINVAL;
+
+	return twl6040_read_reg_cache(codec, TWL6040_REG_TRIM1 + trim);
+}
+EXPORT_SYMBOL_GPL(twl6040_get_trim_value);
+
 static const struct snd_kcontrol_new twl6040_snd_controls[] = {
 	/* Capture gains */
 	SOC_DOUBLE_TLV("Capture Preamplifier Volume",