ASoC: tas6424: Add channel fault reporting

The TAS6426 has a register that reports channel faults such as
overcurrent and continuous DC output. Add reporting of this here.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/codecs/tas6424.h b/sound/soc/codecs/tas6424.h
index b5958c4..c67a783 100644
--- a/sound/soc/codecs/tas6424.h
+++ b/sound/soc/codecs/tas6424.h
@@ -116,6 +116,16 @@
 #define TAS6424_LDGBYPASS_MASK		BIT(TAS6424_LDGBYPASS_SHIFT)
 
 /* TAS6424_GLOB_FAULT1_REG */
+#define TAS6424_FAULT_OC_CH1		BIT(7)
+#define TAS6424_FAULT_OC_CH2		BIT(6)
+#define TAS6424_FAULT_OC_CH3		BIT(5)
+#define TAS6424_FAULT_OC_CH4		BIT(4)
+#define TAS6424_FAULT_DC_CH1		BIT(3)
+#define TAS6424_FAULT_DC_CH2		BIT(2)
+#define TAS6424_FAULT_DC_CH3		BIT(1)
+#define TAS6424_FAULT_DC_CH4		BIT(0)
+
+/* TAS6424_GLOB_FAULT1_REG */
 #define TAS6424_FAULT_CLOCK		BIT(4)
 #define TAS6424_FAULT_PVDD_OV		BIT(3)
 #define TAS6424_FAULT_VBAT_OV		BIT(2)